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Ohara N, Shioji T, Matsumoto J, Inomata S, Sakamoto Y, Kajii Y, Shiigi H, Sadanaga Y. Improved continuous measurement system for atmospheric total peroxy and total organic nitrate under the high NOx condition. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2024; 95:045101. [PMID: 38557884 DOI: 10.1063/5.0172219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 03/03/2024] [Indexed: 04/04/2024]
Abstract
We improved the thermal dissociation cavity attenuated phase shift spectroscopy (TD-CAPS) instrument to measure atmospheric total peroxy nitrates (PNs) and organic nitrates (ONs) continuously under the condition of high NOx. In TD-CAPS, PNs and ONs are dissociated in heated quartz tubes to form NO2, and the NO2 concentration is measured by cavity attenuated phase shift spectroscopy (CAPS). The original TD-CAPS system overestimates PN and ON concentrations in the presence of high NO concentrations. Our laboratory experiments and numerical simulations showed that the main cause of the overestimation was NO oxidation to NO2 by peroxy radicals generated in the heated quartz tubes. In the improved system, NO was converted to NO2 by adding excess O3 after the quartz tubes so that CAPS detected NOx (NO and NO2) instead of NO2. The uncertainty of the improved system was less than 20% with ∼15 parts per billion by volume (ppbv) NO and ∼80 ppbv NO2. The estimated detection limit (3σ) was 0.018 ppbv with an integration time of 2 min in the presence of 64 ppbv NO2. The improved system was tested for measurement of PNs and ONs in an urban area, and the results indicated that interference from NO was successfully suppressed.
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Affiliation(s)
- Nagomi Ohara
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Takahiro Shioji
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Jun Matsumoto
- Faculty of Human Sciences, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama 359-1192, Japan
| | - Satoshi Inomata
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yosuke Sakamoto
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honcho, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-honcho, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
| | - Yoshizumi Kajii
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honcho, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-honcho, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Yasuhiro Sadanaga
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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Yu K, Li M, Harkins C, He J, Zhu Q, Verreyken B, Schwantes RH, Cohen RC, McDonald BC, Harley RA. Improved Spatial Resolution in Modeling of Nitrogen Oxide Concentrations in the Los Angeles Basin. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:20689-20698. [PMID: 38033264 PMCID: PMC10720381 DOI: 10.1021/acs.est.3c06158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 12/02/2023]
Abstract
The extent to which emission control technologies and policies have reduced anthropogenic NOx emissions from motor vehicles is large but uncertain. We evaluate a fuel-based emission inventory for southern California during the June 2021 period, coinciding with the Re-Evaluating the Chemistry of Air Pollutants in CAlifornia (RECAP-CA) field campaign. A modified version of the Fuel-based Inventory of Vehicle Emissions (FIVE) is presented, incorporating 1.3 km resolution gridding and a new light-/medium-duty diesel vehicle category. NOx concentrations and weekday-weekend differences were predicted using the WRF-Chem model and evaluated using satellite and aircraft observations. Model performance was similar on weekdays and weekends, indicating appropriate day-of-week scaling of NOx emissions and a reasonable distribution of emissions by sector. Large observed weekend decreases in NOx are mainly due to changes in on-road vehicle emissions. The inventory presented in this study suggests that on-road vehicles were responsible for 55-72% of the NOx emissions in the South Coast Air Basin, compared to the corresponding fraction (43%) in the planning inventory from the South Coast Air Quality Management District. This fuel-based inventory suggests on-road NOx emissions that are 1.5 ± 0.4, 2.8 ± 0.6, and 1.3 ± 0.7 times the reference EMFAC model estimates for on-road gasoline, light- and medium-duty diesel, and heavy-duty diesel, respectively.
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Affiliation(s)
- Katelyn
A. Yu
- Department
of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
| | - Meng Li
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
- Cooperative
Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Colin Harkins
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
- Cooperative
Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Jian He
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
- Cooperative
Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Qindan Zhu
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
- Department
of Chemistry, University of California,
Berkeley, Berkeley, California 94720, United States
| | - Bert Verreyken
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
| | - Rebecca H. Schwantes
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
| | - Ronald C. Cohen
- Department
of Chemistry, University of California,
Berkeley, Berkeley, California 94720, United States
| | - Brian C. McDonald
- Chemical
Sciences Laboratory, NOAA Earth System Research Laboratories, Boulder, Colorado 80305, United States
| | - Robert A. Harley
- Department
of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, California 94720, United States
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3
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Kenagy HS, Romer Present PS, Wooldridge PJ, Nault BA, Campuzano-Jost P, Day DA, Jimenez JL, Zare A, Pye HOT, Yu J, Song CH, Blake DR, Woo JH, Kim Y, Cohen RC. Contribution of Organic Nitrates to Organic Aerosol over South Korea during KORUS-AQ. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16326-16338. [PMID: 34870986 PMCID: PMC8759034 DOI: 10.1021/acs.est.1c05521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The role of anthropogenic NOx emissions in secondary organic aerosol (SOA) production is not fully understood but is important for understanding the contribution of emissions to air quality. Here, we examine the role of organic nitrates (RONO2) in SOA formation over the Korean Peninsula during the Korea-United States Air Quality field study in Spring 2016 as a model for RONO2 aerosol in cities worldwide. We use aircraft-based measurements of the particle phase and total (gas + particle) RONO2 to explore RONO2 phase partitioning. These measurements show that, on average, one-fourth of RONO2 are in the condensed phase, and we estimate that ≈15% of the organic aerosol (OA) mass can be attributed to RONO2. Furthermore, we observe that the fraction of RONO2 in the condensed phase increases with OA concentration, evidencing that equilibrium absorptive partitioning controls the RONO2 phase distribution. Lastly, we model RONO2 chemistry and phase partitioning in the Community Multiscale Air Quality modeling system. We find that known chemistry can account for one-third of the observed RONO2, but there is a large missing source of semivolatile, anthropogenically derived RONO2. We propose that this missing source may result from the oxidation of semi- and intermediate-volatility organic compounds and/or from anthropogenic molecules that undergo autoxidation or multiple generations of OH-initiated oxidation.
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Affiliation(s)
- Hannah S Kenagy
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Paul S Romer Present
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Paul J Wooldridge
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Benjamin A Nault
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Pedro Campuzano-Jost
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Douglas A Day
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Jose L Jimenez
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Azimeh Zare
- Department of Chemistry, University of California, Berkeley, California 94710, United States
| | - Havala O T Pye
- Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, Durham, North Carolina 27709, United States
| | - Jinhyeok Yu
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61105, Republic of Korea
| | - Chul H Song
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61105, Republic of Korea
| | - Donald R Blake
- Department of Chemistry, University of California, Irvine, California 92697, United States
| | - Jung-Hun Woo
- Department of Civil and Environmental Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Younha Kim
- Energy, Climate, and Environment (ECE) Program, International Institute for Applied Systems Analysis (IIASA), Laxenburg A-2361, Austria
| | - Ronald C Cohen
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Department of Earth & Planetary Sciences, University of California, Berkeley CA 94 720, United States
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4
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Li J, Wang Y, Zhang R, Smeltzer C, Weinheimer A, Herman J, Boersma KF, Celarier EA, Long RW, Szykman JJ, Delgado R, Thompson AM, Knepp TN, Lamsal LN, Janz SJ, Kowalewski MG, Liu X, Nowlan CR. Comprehensive evaluations of diurnal NO 2 measurements during DISCOVER-AQ 2011: effects of resolution-dependent representation of NO x emissions. ATMOSPHERIC CHEMISTRY AND PHYSICS 2021; 21:11133-11160. [PMID: 35949546 PMCID: PMC9359208 DOI: 10.5194/acp-21-11133-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nitrogen oxides (NO x =NO+NO2) play a crucial role in the formation of ozone and secondary inorganic and organic aerosols, thus affecting human health, global radiation budget, and climate. The diurnal and spatial variations in NO2 are functions of emissions, advection, deposition, vertical mixing, and chemistry. Their observations, therefore, provide useful constraints in our understanding of these factors. We employ a Regional chEmical and trAnsport model (REAM) to analyze the observed temporal (diurnal cycles) and spatial distributions of NO2 concentrations and tropospheric vertical column densities (TVCDs) using aircraft in situ measurements and surface EPA Air Quality System (AQS) observations as well as the measurements of TVCDs by satellite instruments (OMI: the Ozone Monitoring Instrument; GOME-2A: Global Ozone Monitoring Experiment - 2A), ground-based Pandora, and the Airborne Compact Atmospheric Mapper (ACAM) instrument in July 2011 during the DISCOVER-AQ campaign over the Baltimore-Washington region. The model simulations at 36 and 4 km resolutions are in reasonably good agreement with the regional mean temporospatial NO2 observations in the daytime. However, we find significant overestimations (underestimations) of model-simulated NO2 (O3) surface concentrations during night-time, which can be mitigated by enhancing nocturnal vertical mixing in the model. Another discrepancy is that Pandora-measured NO2 TVCDs show much less variation in the late afternoon than simulated in the model. The higher-resolution 4 km simulations tend to show larger biases compared to the observations due largely to the larger spatial variations in NO x emissions in the model when the model spatial resolution is increased from 36 to 4 km. OMI, GOME-2A, and the high-resolution aircraft ACAM observations show a more dispersed distribution of NO2 vertical column densities (VCDs) and lower VCDs in urban regions than corresponding 36 and 4 km model simulations, likely reflecting the spatial distribution bias of NO x emissions in the National Emissions Inventory (NEI) 2011.
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Affiliation(s)
- Jianfeng Li
- School of Earth and Atmospheric Sciences, Georgia Institute
of Technology, Atlanta, GA, USA
| | - Yuhang Wang
- School of Earth and Atmospheric Sciences, Georgia Institute
of Technology, Atlanta, GA, USA
| | - Ruixiong Zhang
- School of Earth and Atmospheric Sciences, Georgia Institute
of Technology, Atlanta, GA, USA
| | - Charles Smeltzer
- School of Earth and Atmospheric Sciences, Georgia Institute
of Technology, Atlanta, GA, USA
| | | | - Jay Herman
- Joint Center for Earth Systems Technology, University of
Maryland Baltimore County, Baltimore, MD, USA
| | - K. Folkert Boersma
- Royal Netherlands Meteorological Institute, De Bilt, the
Netherlands
- Meteorology and Air Quality Group, Wageningen University,
Wageningen, the Netherlands
| | - Edward A. Celarier
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Universities Space Research Association, Columbia, MD,
USA
| | - Russell W. Long
- National Exposure Research Laboratory, Office of Research
and Development, US Environmental Protection Agency, Research Triangle Park, NC,
USA
| | - James J. Szykman
- National Exposure Research Laboratory, Office of Research
and Development, US Environmental Protection Agency, Research Triangle Park, NC,
USA
| | - Ruben Delgado
- Joint Center for Earth Systems Technology, University of
Maryland Baltimore County, Baltimore, MD, USA
| | | | - Travis N. Knepp
- NASA Langley Research Center, Virginia, USA
- Science Systems and Applications, Inc., Hampton, VA,
USA
| | - Lok N. Lamsal
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Scott J. Janz
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | | | - Xiong Liu
- Atomic and Molecular Physics Division,
Harvard–Smithsonian Center for Astrophysics, Cambridge, MA, USA
| | - Caroline R. Nowlan
- Atomic and Molecular Physics Division,
Harvard–Smithsonian Center for Astrophysics, Cambridge, MA, USA
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5
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Hallar AG, Brown SS, Crosman E, Barsanti K, Cappa CD, Faloona I, Fast J, Holmes HA, Horel J, Lin J, Middlebrook A, Mitchell L, Murphy J, Womack CC, Aneja V, Baasandorj M, Bahreini R, Banta R, Bray C, Brewer A, Caulton D, de Gouw J, De Wekker SF, Farmer DK, Gaston CJ, Hoch S, Hopkins F, Karle NN, Kelly JT, Kelly K, Lareau N, Lu K, Mauldin RL, Mallia DV, Martin R, Mendoza D, Oldroyd HJ, Pichugina Y, Pratt KA, Saide P, Silva PJ, Simpson W, Stephens BB, Stutz J, Sullivan A. Coupled Air Quality and Boundary-Layer Meteorology in Western U.S. Basins during Winter: Design and Rationale for a Comprehensive Study. BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY 2021; 0:1-94. [PMID: 34446943 PMCID: PMC8384125 DOI: 10.1175/bams-d-20-0017.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Wintertime episodes of high aerosol concentrations occur frequently in urban and agricultural basins and valleys worldwide. These episodes often arise following development of persistent cold-air pools (PCAPs) that limit mixing and modify chemistry. While field campaigns targeting either basin meteorology or wintertime pollution chemistry have been conducted, coupling between interconnected chemical and meteorological processes remains an insufficiently studied research area. Gaps in understanding the coupled chemical-meteorological interactions that drive high pollution events make identification of the most effective air-basin specific emission control strategies challenging. To address this, a September 2019 workshop occurred with the goal of planning a future research campaign to investigate air quality in Western U.S. basins. Approximately 120 people participated, representing 50 institutions and 5 countries. Workshop participants outlined the rationale and design for a comprehensive wintertime study that would couple atmospheric chemistry and boundary-layer and complex-terrain meteorology within western U.S. basins. Participants concluded the study should focus on two regions with contrasting aerosol chemistry: three populated valleys within Utah (Salt Lake, Utah, and Cache Valleys) and the San Joaquin Valley in California. This paper describes the scientific rationale for a campaign that will acquire chemical and meteorological datasets using airborne platforms with extensive range, coupled to surface-based measurements focusing on sampling within the near-surface boundary layer, and transport and mixing processes within this layer, with high vertical resolution at a number of representative sites. No prior wintertime basin-focused campaign has provided the breadth of observations necessary to characterize the meteorological-chemical linkages outlined here, nor to validate complex processes within coupled atmosphere-chemistry models.
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Affiliation(s)
| | | | - Erik Crosman
- Department of Life, Earth, and Environmental Sciences, West Texas A&M University
| | - Kelley Barsanti
- Department of Chemical and Environmental Engineering, Center for Environmental Research and Technology, University of California, Riverside
| | - Christopher D. Cappa
- Department of Civil and Environmental Engineering, University of California, Davis 95616 USA
| | - Ian Faloona
- Department of Land, Air and Water Resources, University of California, Davis
| | - Jerome Fast
- Atmospheric Science and Global Change Division, Pacific Northwest, National Laboratory, Richland, Washington, USA
| | - Heather A. Holmes
- Department of Chemical Engineering, University of Utah, Salt Lake City, UT
| | - John Horel
- Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT
| | - John Lin
- Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT
| | | | - Logan Mitchell
- Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT
| | - Jennifer Murphy
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
| | - Caroline C. Womack
- Cooperative Institute for Research in Environmental Sciences, University of Colorado/ NOAA Chemical Sciences Laboratory, Boulder, CO
| | - Viney Aneja
- Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University
| | | | - Roya Bahreini
- Environmental Sciences, University of California, Riverside, CA
| | | | - Casey Bray
- Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University
| | - Alan Brewer
- NOAA Chemical Sciences Laboratory, Boulder, CO
| | - Dana Caulton
- Department of Atmospheric Science, University of Wyoming
| | - Joost de Gouw
- Cooperative Institute for Research in Environmental Sciences & Department of Chemistry, University of Colorado, Boulder, CO
| | | | | | - Cassandra J. Gaston
- Department of Atmospheric Science - Rosenstiel School of Marine and Atmospheric Science, University of Miami
| | - Sebastian Hoch
- Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT
| | | | - Nakul N. Karle
- Environmental Science and Engineering, The University of Texas at El Paso, TX
| | - James T. Kelly
- Office of Air Quality Planning and Standards, US Environmental Protection Agency, Research Triangle Park, NC
| | - Kerry Kelly
- Chemical Engineering, University of Utah, Salt Lake City, UT
| | - Neil Lareau
- Atmospheric Sciences and Environmental Sciences and Health, University of Nevada, Reno, NV
| | - Keding Lu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Science and Engineering, Peking University, Beijing, China, 100871
| | - Roy L. Mauldin
- National Center for Atmospheric Research, Boulder, CO 80307, USA
| | - Derek V. Mallia
- Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT
| | - Randal Martin
- Civil and Environmental Engineering, Utah State University, Utah Water Research Laboratory, Logan, UT
| | - Daniel Mendoza
- Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT
| | - Holly J. Oldroyd
- Department of Civil and Environmental Engineering, University of California, Davis
| | | | | | - Pablo Saide
- Department of Atmospheric and Oceanic Sciences, and Institute of the Environment and Sustainability, University of California, Los Angeles
| | - Phillip J. Silva
- Food Animal Environmental Systems Research Unit, USDA-ARS, Bowling Green, KY
| | - William Simpson
- Department of Chemistry, Biochemistry, and Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775-6160
| | - Britton B. Stephens
- Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, CO
| | - Jochen Stutz
- Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles
| | - Amy Sullivan
- Department of Atmospheric Science, Colorado State University, Fort Collins, CO
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6
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Garner NM, Matchett LC, Osthoff HD. Quantification of Non-refractory Aerosol Nitrate in Ambient Air by Thermal Dissociation Cavity Ring-Down Spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:9854-9861. [PMID: 32639152 DOI: 10.1021/acs.est.0c01156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A thermal dissociation cavity ring-down spectrometer (TD-CRDS) for real-time quantification of non-refractory aerosol nitrate in ambient air is described. The instrument uses four parallel detection channels and heated quartz inlets to convert particulate organic nitrate (pON) (at 350 °C) and ammonium nitrate (NH4NO3) aerosol (at 540 °C) to nitrogen dioxide (NO2), whose mixing ratio is monitored via its absorption at 405 nm. Concentrations of aerosol nitrate are determined by difference relative to a parallel TD-CRDS channel in which aerosol is removed by in-line filtering. The method was validated by sampling gas streams containing laboratory-generated NH4NO3 aerosol in parallel to a scanning mobility particle sizer (SMPS). Scatter plots of TD-CRDS and SMPS data correlated (r2 > 0.9) with slopes near unity, confirming quantitative TD-CRDS response to NH4NO3 aerosol. In contrast, no response was observed when sampling (NH4)2SO4 aerosol. Instrument limits of detection (LOD; 2σ, 10 s) were 120 parts per trillion by volume (10-12, pptv) for NO2 and 148 pptv for ammonium nitrate. Partial and unsustained conversion of refractory sodium nitrate (NaNO3) was observed at the inlet temperature used for complete dissociation of HNO3 and NH4NO3, suggesting that this channel may not constitute a robust measurement of total odd nitrogen (NOy) in environments where NaNO3 particles may be present (e.g., the polluted marine boundary layer). A potential application of the TD-CRDS is the calibration of particle counters, for which convenient methods are not currently available. Sample ambient air measurements of pON and total aerosol nitrate in Calgary are presented.
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Affiliation(s)
- Natasha M Garner
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Laura C Matchett
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Hans D Osthoff
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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7
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Dong Y, Gu M, Zhu G, Tan T, Liu K, Gao X. Fully Integrated Photoacoustic NO 2 Sensor for Sub-ppb Level Measurement. SENSORS 2020; 20:s20051270. [PMID: 32110962 PMCID: PMC7085709 DOI: 10.3390/s20051270] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 02/21/2020] [Accepted: 02/24/2020] [Indexed: 11/21/2022]
Abstract
A fully integrated photoacoustic nitrogen dioxide (NO2) sensor is developed and demonstrated. In this sensor, an embedded photoacoustic cell was manufactured by using an up-to-date 3D printing technique. A blue laser diode was used as a light source for excitation of photoacoustic wave in the photoacoustic cell. The photoacoustic wave is detected by a sensitive microelectromechanical system (MEMS) microphone. Homemade circuits are integrated into the sensor for laser diode driving and signal processing. The sensor was calibrated by using a chemiluminescence NO–NO2–NOX gas analyzer. And the performance of this sensor was evaluated. The linear relationship between photoacoustic signals and NO2 concentrations was verified in a range of below 202 ppb. The limit of detection was determined to 0.86 ppb with an integration time of 1 s. The corresponding normalized noise equivalent absorption was 2.0 × 10−8 cm−1∙W∙Hz−1/2. The stability and the optimal integration time were evaluated with an Allan deviation analysis, from which a detection limit of 0.25 ppb at the optimal integration time of 240 s was obtained. The sensor was used to measure outdoor air and the results agree with that obtained from the NO–NO2–NOX gas analyzer. The low-cost and portable photoacoustic NO2 sensor has a potential application for atmospheric NO2 monitoring.
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Affiliation(s)
- Yang Dong
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; (Y.D.); (M.G.); (G.Z.); (T.T.); (K.L.)
- Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China
| | - Mingsi Gu
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; (Y.D.); (M.G.); (G.Z.); (T.T.); (K.L.)
- Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China
| | - Gongdong Zhu
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; (Y.D.); (M.G.); (G.Z.); (T.T.); (K.L.)
| | - Tu Tan
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; (Y.D.); (M.G.); (G.Z.); (T.T.); (K.L.)
| | - Kun Liu
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; (Y.D.); (M.G.); (G.Z.); (T.T.); (K.L.)
| | - Xiaoming Gao
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; (Y.D.); (M.G.); (G.Z.); (T.T.); (K.L.)
- Correspondence:
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8
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Yang X, Luo F, Li J, Chen D, E Y, Lin W, Jin J. Alkyl and aromatic nitrates in atmospheric particles determined by gas chromatography tandem mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:2762-2770. [PMID: 31713172 DOI: 10.1007/s13361-019-02347-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 09/06/2019] [Accepted: 10/08/2019] [Indexed: 06/10/2023]
Abstract
Organic nitrates in the atmosphere are associated with photochemical pollution and are the main components of secondary organic aerosols, which are related to haze. An efficient method for determining organic nitrates in atmospheric fine particles (PM2.5) was established using synthesized standards. Four alkyl (C7-C10) nitrates and three aromatic nitrates (tolyl nitrate, phenethyl nitrate, and p-xylyl nitrate) were synthesized and characterized by 1H and 13C nuclear magnetic resonance spectroscopy. The optimal ions for quantifying and confirming the identities of the analytes were identified by analyzing the standards by gas chromatography tandem mass spectrometry. The tandem mass spectrometer was a triple quadrupole instrument. This method can obtain more accurate information of organic nitrates than on-line methods. Spiked recovery tests were performed using three spike concentrations, and the recoveries were 61.0-111.4 %, and the relative standard deviations were < 8.2% for all of the analytes. Limits of detection and quantification were determined, and the linearity of the method for each analyte was assessed. The applicability of the method was demonstrated by analyzing six PM2.5 samples. Overall, 87% of the analytes were detected in the samples. Phenethyl nitrate, heptyl nitrate, and octyl nitrate were detected in every sample. Phenethyl nitrate was found at a higher mean concentration (3.23 ng/m3) than the other analytes.
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Affiliation(s)
- Xinhao Yang
- College of Life and Environmental Sciences, Minzu University of China, Room 1316, Li Gong Building, Beijing, 100081, China
| | - Feixian Luo
- College of Life and Environmental Sciences, Minzu University of China, Room 1316, Li Gong Building, Beijing, 100081, China
| | - Junqi Li
- College of Life and Environmental Sciences, Minzu University of China, Room 1316, Li Gong Building, Beijing, 100081, China
| | - Deyang Chen
- College of Life and Environmental Sciences, Minzu University of China, Room 1316, Li Gong Building, Beijing, 100081, China
| | - Ye E
- College of Life and Environmental Sciences, Minzu University of China, Room 1316, Li Gong Building, Beijing, 100081, China
| | - Weili Lin
- College of Life and Environmental Sciences, Minzu University of China, Room 1316, Li Gong Building, Beijing, 100081, China
| | - Jun Jin
- College of Life and Environmental Sciences, Minzu University of China, Room 1316, Li Gong Building, Beijing, 100081, China.
- Engineering Research Center of Food Environment and Public Health, Beijing, 100081, China.
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9
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Zare A, Fahey KM, Sarwar G, Cohen RC, Pye HOT. Vapor-pressure pathways initiate but hydrolysis products dominate the aerosol estimated from organic nitrates. ACS EARTH & SPACE CHEMISTRY 2019; 3:1426-1437. [PMID: 31667449 PMCID: PMC6820051 DOI: 10.1021/acsearthspacechem.9b00067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Organic nitrates contribute significantly to the total organic aerosol burden. However, the formation and loss mechanisms of particulate organic nitrates (PONs) remain poorly understood. In this study, with the CMAQ modeling system, we implement a detailed biogenic volatile organic carbon gas phase oxidation mechanism and an explicit representation of multiphase organic nitrate formation and loss, including both aqueous-phase uptake and vapor-pressure driven partitioning into organic aerosol as well as condensed-phase reactions. We find vapor-pressure dependent partitioning is the leading mechanism for formation of PONs and hydrolysis is a major loss mechanism for PON resulting in substantial amounts of organic aerosol that originate as an organic nitrate. Partitioning and hydrolysis together can produce high concentrations (up to 5 μg/m3) of PON-derived aerosols over the southeast United States. The main source of PON-derived aerosols is monoterpene nitrates that have been chemically processed to lose their nitrate functionality through aqueous chemistry. In contrast, the major portion of aqueous aerosol and in-cloud PON, which retains its nitrate moiety, are soluble isoprene nitrates. We evaluate the model using the observations from the Southern Oxidant and Aerosol Study (SOAS) campaign in the Southeast US in summer 2013 and show implementing aerosol-phase pathways for organic nitrates dramatically improves the magnitude of total alkyl nitrates (ANs) in CMAQ. The contribution of PONs to the total ANs at the SOAS site is estimated to be ~20%, a value in the range of the measurements. The predicted AN composition is shifted from monoterpene to isoprene and anthropogenic organic nitrates.
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Affiliation(s)
- Azimeh Zare
- National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Kathleen M. Fahey
- National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Golam Sarwar
- National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Ronald C. Cohen
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Department of Earth and Planetary Sciences, University of California Berkeley, Berkeley, California 94720, United States
| | - Havala O. T. Pye
- National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
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10
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Romer PS, Wooldridge PJ, Crounse JD, Kim MJ, Wennberg PO, Dibb JE, Scheuer E, Blake DR, Meinardi S, Brosius AL, Thames AB, Miller DO, Brune WH, Hall SR, Ryerson TB, Cohen RC. Constraints on Aerosol Nitrate Photolysis as a Potential Source of HONO and NO x. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:13738-13746. [PMID: 30407797 DOI: 10.1021/acs.est.8b03861] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The concentration of nitrogen oxides (NO x) plays a central role in controlling air quality. On a global scale, the primary sink of NO x is oxidation to form HNO3. Gas-phase HNO3 photolyses slowly with a lifetime in the troposphere of 10 days or more. However, several recent studies examining HONO chemistry have proposed that particle-phase HNO3 undergoes photolysis 10-300 times more rapidly than gas-phase HNO3. We present here constraints on the rate of particle-phase HNO3 photolysis based on observations of NO x and HNO3 collected over the Yellow Sea during the KORUS-AQ study in summer 2016. The fastest proposed photolysis rates are inconsistent with the observed NO x to HNO3 ratios. Negligible to moderate enhancements of the HNO3 photolysis rate in particles, 1-30 times faster than in the gas phase, are most consistent with the observations. Small or moderate enhancement of particle-phase HNO3 photolysis would not significantly affect the HNO3 budget but could help explain observations of HONO and NO x in highly aged air.
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Affiliation(s)
- Paul S Romer
- Department of Chemistry , University of California Berkeley , Berkeley , California 94720 , United States
| | - Paul J Wooldridge
- Department of Chemistry , University of California Berkeley , Berkeley , California 94720 , United States
| | - John D Crounse
- Division of Geological and Planetary Sciences , California Institute of Technology , Pasadena , California 91125 , United States
| | - Michelle J Kim
- Division of Geological and Planetary Sciences , California Institute of Technology , Pasadena , California 91125 , United States
| | - Paul O Wennberg
- Division of Geological and Planetary Sciences , California Institute of Technology , Pasadena , California 91125 , United States
- Division of Engineering and Applied Science , California Institute of Technology , Pasadena , California 91125 , United States
| | - Jack E Dibb
- Institute for the Study of Earth, Oceans, and Space , University of New Hampshire , Durham, New Hampshire 03824 , United States
| | - Eric Scheuer
- Institute for the Study of Earth, Oceans, and Space , University of New Hampshire , Durham, New Hampshire 03824 , United States
| | - Donald R Blake
- Department of Chemistry , University of California Irvine , Irvine , California 92697 , United States
| | - Simone Meinardi
- Department of Chemistry , University of California Irvine , Irvine , California 92697 , United States
| | - Alexandra L Brosius
- Department of Meteorology and Atmospheric Science , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - Alexander B Thames
- Department of Meteorology and Atmospheric Science , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - David O Miller
- Department of Meteorology and Atmospheric Science , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - William H Brune
- Department of Meteorology and Atmospheric Science , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - Samuel R Hall
- Atmospheric Chemistry Observations and Modeling Laboratory, NCAR , Boulder , Colorado 80301 , United States
| | - Thomas B Ryerson
- Chemical Sciences Division , NOAA Earth System Research Laboratory , Boulder , Colorado 80305 , United States
| | - Ronald C Cohen
- Department of Chemistry , University of California Berkeley , Berkeley , California 94720 , United States
- Department of Earth and Planetary Sciences , University of California Berkeley , Berkeley , California 94720 , United States
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11
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Vander Wall AC, Lakey PSJ, Rossich Molina E, Perraud V, Wingen LM, Xu J, Soulsby D, Gerber RB, Shiraiwa M, Finlayson-Pitts BJ. Understanding interactions of organic nitrates with the surface and bulk of organic films: implications for particle growth in the atmosphere. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2018; 20:1593-1610. [PMID: 30382275 DOI: 10.1039/c8em00348c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding impacts of secondary organic aerosol (SOA) in air requires a molecular-level understanding of particle growth via interactions between gases and particle surfaces. The interactions of three gaseous organic nitrates with selected organic substrates were measured at 296 K using attenuated total reflection Fourier transform infrared spectroscopy. The organic substrates included a long chain alkane (triacontane, TC), a keto-acid (pinonic acid, PA), an amorphous ester oligomer (poly(ethylene adipate) di-hydroxy terminated, PEA), and laboratory-generated SOA from α-pinene ozonolysis. There was no uptake of the organic nitrates on the non-polar TC substrate, but significant uptake occurred on PEA, PA, and α-pinene SOA. Net uptake coefficients (γ) at the shortest reaction times accessible in these experiments ranged from 3 × 10-4 to 9 × 10-6 and partition coefficients (K) from 1 × 107 to 9 × 104. Trends in γ did not quantitatively follow trends in K, suggesting that the intermolecular forces involved in gas-surface interactions are not the same as those in the bulk, which is supported by theoretical calculations. Kinetic modeling showed that nitrates diffused throughout the organic films over several minutes, and that the bulk diffusion coefficients evolved as uptake/desorption occurred. A plasticizing effect occurred upon incorporation of the organic nitrates, whereas desorption caused decreases in diffusion coefficients in the upper layers, suggesting a crusting effect. Accurate predictions of particle growth in the atmosphere will require knowledge of uptake coefficients, which are likely to be several orders of magnitude less than one, and of the intermolecular interactions of gases with particle surfaces as well as with the particle bulk.
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Affiliation(s)
- A C Vander Wall
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA.
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12
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Simon H, Valin LC, Baker KR, Henderson BH, Crawford JH, Pusede SE, Kelly JT, Foley KM, Owen RC, Cohen RC, Timin B, Weinheimer AJ, Possiel N, Misenis C, Diskin GS, Fried A. Characterizing CO and NO y Sources and Relative Ambient Ratios in the Baltimore Area Using Ambient Measurements and Source Attribution Modeling. JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES : JGR 2018; 123:3304-3320. [PMID: 35958736 PMCID: PMC9364951 DOI: 10.1002/2017jd027688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Modeled source attribution information from the Community Multiscale Air Quality model was coupled with ambient data from the 2011 Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality Baltimore field study. We assess source contributions and evaluate the utility of using aircraft measured CO and NO y relationships to constrain emission inventories. We derive ambient and modeled ΔCO:ΔNO y ratios that have previously been interpreted to represent CO:NO y ratios in emissions from local sources. Modeled and measured ΔCO:ΔNO y are similar; however, measured ΔCO:ΔNO y has much more daily variability than modeled values. Sector-based tagging shows that regional transport, on-road gasoline vehicles, and nonroad equipment are the major contributors to modeled CO mixing ratios in the Baltimore area. In addition to those sources, on-road diesel vehicles, soil emissions, and power plants also contribute substantially to modeled NO y in the area. The sector mix is important because emitted CO:NO x ratios vary by several orders of magnitude among the emission sources. The model-predicted gasoline/diesel split remains constant across all measurement locations in this study. Comparison of ΔCO:ΔNO y to emitted CO:NO y is challenged by ambient and modeled evidence that free tropospheric entrainment, and atmospheric processing elevates ambient ΔCO:ΔNO y above emitted ratios. Specifically, modeled ΔCO:ΔNO y from tagged mobile source emissions is enhanced 5-50% above the emitted ratios at times and locations of aircraft measurements. We also find a correlation between ambient formaldehyde concentrations and measured ΔCO:ΔNO y suggesting that secondary CO formation plays a role in these elevated ratios. This analysis suggests that ambient urban daytime ΔCO:ΔNO y values are not reflective of emitted ratios from individual sources.
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Affiliation(s)
- Heather Simon
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Luke C Valin
- National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Kirk R Baker
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Barron H Henderson
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | | | - Sally E Pusede
- Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA
| | - James T Kelly
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Kristen M Foley
- National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - R Chris Owen
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Ronald C Cohen
- Department of Chemistry, University of California, Berkeley, CA, USA
- Department of Earth and Planetary Science, University of California, Berkeley, CA, USA
| | - Brian Timin
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | | | - Norm Possiel
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Chris Misenis
- Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | | | - Alan Fried
- Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA
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13
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Lee BH, Lopez-Hilfiker FD, Schroder JC, Campuzano-Jost P, Jimenez JL, McDuffie EE, Fibiger DL, Veres PR, Brown SS, Campos TL, Weinheimer AJ, Flocke FF, Norris G, O'Mara K, Green JR, Fiddler MN, Bililign S, Shah V, Jaeglé L, Thornton JA. Airborne Observations of Reactive Inorganic Chlorine and Bromine Species in the Exhaust of Coal-Fired Power Plants. JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES : JGR 2018; 123:11225-11237. [PMID: 30997299 PMCID: PMC6463521 DOI: 10.1029/2018jd029284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
We present airborne observations of gaseous reactive halogen species (HCl, Cl2, ClNO2, Br2,BrNO2, and BrCl), sulfur dioxide (SO2), and nonrefractory fine particulate chloride (pCl) and sulfate(pSO4) in power plant exhaust. Measurements were conducted during the Wintertime INvestigation of Transport, Emissions, and Reactivity campaign in February-March of 2015 aboard the NCAR-NSF C-130 aircraft. Fifty air mass encounters were identified in which SO2 levels were elevated ~5 ppb above ambient background levels and in proximity to operational power plants. Each encounter was attributed to one or more potential emission sources using a simple wind trajectory analysis. In case studies, we compare measured emission ratios to those reported in the 2011 National Emissions Inventory and present evidence of the conversion of HCl emitted from power plants to ClNO2. Taking into account possible chemical conversion downwind, there was general agreement between the observed and reported HCl: SO2 emission ratios. Reactive bromine species (Br2, BrNO2, and/or BrCl) were detected in the exhaust of some coal-fired power plants, likely related to the absence of wet flue gas desulfurization emission control technology. Levels of bromine species enhanced in some encounters exceeded those expected assuming all of the native bromide in coal was released to the atmosphere, though there was no reported use of bromide salts (as a way to reduce mercury emissions) during Wintertime INvestigation of Transport, Emissions, and Reactivity observations. These measurements represent the first ever in-flight observations of reactive gaseous chlorine and bromine containing compounds present in coal-fired power plant exhaust.
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Affiliation(s)
- Ben H Lee
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
| | - Felipe D Lopez-Hilfiker
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
- Now at Paul Scherrer Institute, Villigen, Switzerland
| | - Jason C Schroder
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | - Pedro Campuzano-Jost
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | - Jose L Jimenez
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | - Erin E McDuffie
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
- Earth System Research Laboratory, Chemical Sciences Division, National Oceanic and Atmospheric Administration, Boulder, CO, USA
| | - Dorothy L Fibiger
- Earth System Research Laboratory, Chemical Sciences Division, National Oceanic and Atmospheric Administration, Boulder, CO, USA
| | - Patrick R Veres
- Earth System Research Laboratory, Chemical Sciences Division, National Oceanic and Atmospheric Administration, Boulder, CO, USA
| | - Steven S Brown
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
- Earth System Research Laboratory, Chemical Sciences Division, National Oceanic and Atmospheric Administration, Boulder, CO, USA
| | | | | | - Frank F Flocke
- National Center for Atmospheric Research, Boulder, CO, USA
| | - Gary Norris
- U.S. Environmental Protection Agency, Research Triangle, NC, USA
| | - Kate O'Mara
- U.S. Environmental Protection Agency, Research Triangle, NC, USA
| | - Jaime R Green
- Department of Physics, North Carolina Agricultural and Technical State University, Greensboro, NC, USA
- NOAA-ISET Center, North Carolina Agricultural and Technical State University, Greensboro, NC, USA
| | - Marc N Fiddler
- NOAA-ISET Center, North Carolina Agricultural and Technical State University, Greensboro, NC, USA
| | - Solomon Bililign
- Department of Physics, North Carolina Agricultural and Technical State University, Greensboro, NC, USA
- NOAA-ISET Center, North Carolina Agricultural and Technical State University, Greensboro, NC, USA
| | - Viral Shah
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
| | - Lyatt Jaeglé
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
| | - Joel A Thornton
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
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14
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Matichuk R, Tonnesen G, Luecken D, Gilliam R, Napelenok SL, Baker KR, Schwede D, Murphy B, Helmig D, Lyman SN, Roselle S. Evaluation of the Community Multiscale Air Quality Model for Simulating Winter Ozone Formation in the Uinta Basin. JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES : JGR 2017; 122:13545-13572. [PMID: 30245953 PMCID: PMC6145463 DOI: 10.1002/2017jd027057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The Weather Research and Forecasting (WRF) and Community Multiscale Air Quality (CMAQ) models were used to simulate a 10 day high-ozone episode observed during the 2013 Uinta Basin Winter Ozone Study (UBWOS). The baseline model had a large negative bias when compared to ozone (O3) and volatile organic compound (VOC) measurements across the basin. Contrary to other wintertime Uinta Basin studies, predicted nitrogen oxides (NO x ) were typically low compared to measurements. Increases to oil and gas VOC emissions resulted in O3 predictions closer to observations, and nighttime O3 improved when reducing the deposition velocity for all chemical species. Vertical structures of these pollutants were similar to observations on multiple days. However, the predicted surface layer VOC mixing ratios were generally found to be underestimated during the day and overestimated at night. While temperature profiles compared well to observations, WRF was found to have a warm temperature bias and too low nighttime mixing heights. Analyses of more realistic snow heat capacity in WRF to account for the warm bias and vertical mixing resulted in improved temperature profiles, although the improved temperature profiles seldom resulted in improved O3 profiles. While additional work is needed to investigate meteorological impacts, results suggest that the uncertainty in the oil and gas emissions contributes more to the underestimation of O3. Further, model adjustments based on a single site may not be suitable across all sites within the basin.
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Affiliation(s)
- Rebecca Matichuk
- Region 8 Office of Partnerships and Regulatory Assistance, Air Program, Indoor Air, Toxics, and Transportation Unit, U.S. Environmental Protection Agency, Denver, CO, USA
| | - Gail Tonnesen
- Region 8 Office of Partnerships and Regulatory Assistance, Air Program, Indoor Air, Toxics, and Transportation Unit, U.S. Environmental Protection Agency, Denver, CO, USA
| | - Deborah Luecken
- Office of Research and Development, Computational Exposure Division, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Rob Gilliam
- Office of Research and Development, Computational Exposure Division, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Sergey L Napelenok
- Office of Research and Development, Computational Exposure Division, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Kirk R Baker
- Office of Air Quality Planning and Standards, Air Quality Assessment Division, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Donna Schwede
- Office of Research and Development, Computational Exposure Division, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Ben Murphy
- Office of Research and Development, Computational Exposure Division, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Detlev Helmig
- Institute of Artic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA
| | - Seth N Lyman
- Bingham Research Center, Utah State University, Vernal, UT, USA
- Department of Chemistry and Biochemistry, Utah State University, Vernal, UT, USA
| | - Shawn Roselle
- Office of Research and Development, Computational Exposure Division, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
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15
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Prabhakar G, Parworth C, Zhang X, Kim H, Young D, Beyersdorf AJ, Ziemba LD, Nowak JB, Bertram TH, Faloona IC, Zhang Q, Cappa CD. Observational assessment of the role of nocturnal residual-layer chemistry in determining daytime surface particulate nitrate concentrations. ATMOSPHERIC CHEMISTRY AND PHYSICS 2017; 17:14747-14770. [PMID: 32704248 PMCID: PMC7376613 DOI: 10.5194/acp-17-14747-2017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
This study discusses an analysis of combined airborne and ground observations of particulate nitrate (NO3 - (p)) concentrations made during the wintertime DISCOVER-AQ study at one of the most polluted cities in the United States, Fresno, CA in the San Joaquin Valley (SJV) and focuses on development of understanding of the various processes that impact surface nitrate concentrations during pollution events. The results provide an explicit case-study illustration of how nighttime chemistry can influence daytime surface-level NO3 - (p) concentrations, complementing previous studies in the SJV. The observations exemplify the critical role that nocturnal chemical production of NO3 - (p) aloft in the residual layer (RL) can play in determining daytime surface-level NO3 - (p) concentrations. Further, they indicate that nocturnal production of NO3 - (p) in the RL, along with daytime photochemical production, can contribute substantially to the build-up and sustaining of severe pollution episodes. The exceptionally shallow nocturnal boundary layer heights characteristic of wintertime pollution events in the SJV intensifies the importance of nocturnal production aloft in the residual layer to daytime surface concentrations. The observations also demonstrate that dynamics within the RL can influence the early-morning vertical distribution of NO3 - (p), despite low wintertime wind speeds. This overnight reshaping of the vertical distribution above the city plays an important role in determining the net impact of nocturnal chemical production on local and regional surface-level NO3 - (p) concentrations. Entrainment of clean free tropospheric air into the boundary layer in the afternoon is identified as an important process that reduces surface-level NO3 - (p) and limits build-up during pollution episodes. The influence of dry deposition of HNO3 gas to the surface on daytime particulate nitrate concentrations is important but limited by an excess of ammonia in the region, which leads to only a small fraction of nitrate existing in the gas-phase even during the warmer daytime. However, in late afternoon, when diminishing solar heating leads to a rapid fall in the mixed boundary layer height, the impact of surface deposition is temporarily enhanced and can lead to a substantial decline in surface-level particulate nitrate concentrations; this enhanced deposition is quickly arrested by a decrease in surface temperature, which drops the gas-phase fraction to near zero. The overall importance of enhanced late afternoon gas-phase loss to the multiday build-up of pollution events is limited by the very shallow nocturnal boundary layer. The case study here demonstrates that mixing down of NO3 - (p) from the RL can contribute a majority of the surface-level NO3 - (p) in the morning (here, ~80%), and a strong influence can persist into the afternoon even when photochemical production is maximum. The particular day-to-day contribution of aloft nocturnal NO3 - (p) production to surface concentrations will depend on prevailing chemical and meteorological conditions. Although specific to the SJV, the observations and conceptual framework further developed here provide general insights into the evolution of pollution episodes in wintertime environments.
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Affiliation(s)
- Gouri Prabhakar
- Department of Civil and Environmental Engineering, University of California, Davis, CA, USA
| | - Caroline Parworth
- Department of Environmental Toxicology, University of California, Davis, CA, USA
| | - Xiaolu Zhang
- Department of Civil and Environmental Engineering, University of California, Davis, CA, USA
| | - Hwajin Kim
- Department of Environmental Toxicology, University of California, Davis, CA, USA
- Now at: Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology, Seoul, South Korea
| | - Dominique Young
- Department of Environmental Toxicology, University of California, Davis, CA, USA
- Now at: Air Quality Research Center, University of California, Davis, California, USA
| | - Andreas J. Beyersdorf
- NASA Langley Research Center, Hampton, Virginia, USA
- Now at: Department of Chemistry, California State University, San Bernardino, CA, USA
| | | | - John B. Nowak
- NASA Langley Research Center, Hampton, Virginia, USA
| | | | - Ian C. Faloona
- Department of Land, Air and Water Resources, University of California, Davis, CA, USA
| | - Qi Zhang
- Department of Environmental Toxicology, University of California, Davis, CA, USA
| | - Christopher D. Cappa
- Department of Civil and Environmental Engineering, University of California, Davis, CA, USA
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16
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Chen J, Wu H, Liu AW, Hu SM, Zhang J. Field Measurement of NO2 and RNO2 by Two-Channel Thermal Dissociation Cavity Ring Down Spectrometer. CHINESE J CHEM PHYS 2017. [DOI: 10.1063/1674-0068/30/cjcp1705084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Jian Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- Department of Chemistry and Air Pollution Research Center, University of California, Riverside, California 92521, America
| | - Hao Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - An-wen Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Shui-ming Hu
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Jingsong Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- Department of Chemistry and Air Pollution Research Center, University of California, Riverside, California 92521, America
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17
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Fan Y, Xing C, Yuan H, Chai R, Zhao L, Zhan Y. Conjugated Polyelectrolyte-Based New Strategy for in Situ Detection of Carbon Dioxide. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20313-20317. [PMID: 28594165 DOI: 10.1021/acsami.7b05410] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A conjugated polymer centered on fluorene and 2,1,3-benzothia-diazole (PFBT) is prepared for sensing CO2 in situ with high sensitivity and low background. Upon introducing CO2, the weaker electrostatic repulsion and stronger hydrophobic interactions between neighboring PFBT molecules enhance the interchain contacts compared to that without CO2, leading to the energy transfer from fluorene to 2,1,3-benzothia-diazole sites and the emission color shift from blue to green, which is sensitive to sensing CO2 in atmospheric air with a content of ∼400 ppm. Importantly, PFBT is employed to monitor photosynthesis and respiration upon cycling day and night in situ.
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Affiliation(s)
- Yibing Fan
- Key Laboratory of Hebei Province for Molecular Biophysics, Institute of Biophysics, Hebei University of Technology , Tianjin 300401, P.R. China
| | - Chengfen Xing
- Key Laboratory of Hebei Province for Molecular Biophysics, Institute of Biophysics, Hebei University of Technology , Tianjin 300401, P.R. China
- School of Materials Science and Engineering, Hebei University of Technology , Tianjin 300130, P.R. China
| | - Hongbo Yuan
- School of Materials Science and Engineering, Hebei University of Technology , Tianjin 300130, P.R. China
| | - Ran Chai
- School of Materials Science and Engineering, Hebei University of Technology , Tianjin 300130, P.R. China
| | - Linfei Zhao
- Key Laboratory of Hebei Province for Molecular Biophysics, Institute of Biophysics, Hebei University of Technology , Tianjin 300401, P.R. China
| | - Yong Zhan
- Key Laboratory of Hebei Province for Molecular Biophysics, Institute of Biophysics, Hebei University of Technology , Tianjin 300401, P.R. China
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18
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Brown SS, An H, Lee M, Park JH, Lee SD, Fibiger DL, McDuffie EE, Dubé WP, Wagner NL, Min KE. Cavity enhanced spectroscopy for measurement of nitrogen oxides in the Anthropocene: results from the Seoul tower during MAPS 2015. Faraday Discuss 2017; 200:529-557. [DOI: 10.1039/c7fd00001d] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cavity enhanced spectroscopy, CES, is a high sensitivity direct absorption method that has seen increasing utility in the last decade, a period also marked by increasing requirements for understanding human impacts on atmospheric composition. This paper describes the current NOAA six channel cavity ring-down spectrometer (CRDS, the most common form of CES) for measurement of nitrogen oxides and O3. It further describes the results from measurements from a tower 300 m above the urban area of Seoul in late spring of 2015. The campaign demonstrates the performance of the CRDS instrument and provides new data on both photochemistry and nighttime chemistry in a major Asian megacity. The instrument provided accurate, high time resolution data for N2O5, NO, NO2, NOyand O3, but suffered from large wall loss in the sampling of NO3, illustrating the requirement for calibration of the NO3inlet transmission. Both the photochemistry and nighttime chemistry of nitrogen oxides and O3were rapid in this megacity. Sustained average rates of O3buildup of 10 ppbv h−1during recurring morning and early afternoon sea breezes led to a 50 ppbv average daily O3rise. Nitrate radical production rates,P(NO3), averaged 3–4 ppbv h−1in late afternoon and early evening, much greater than contemporary data from Los Angeles, a comparable U. S. megacity. TheseP(NO3) were much smaller than historical data from Los Angeles, however. Nighttime data at 300 m above ground showed considerable variability in high time resolution nitrogen oxide and O3, likely resulting from sampling within gradients in the nighttime boundary layer structure. Apparent nighttime biogenic VOC oxidation rates of several ppbv h−1were also likely influenced by vertical gradients. Finally, daytime N2O5mixing ratios of 3–35 pptv were associated with rapid daytimeP(NO3) and agreed well with a photochemical steady state calculation.
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19
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Ng NL, Brown SS, Archibald AT, Atlas E, Cohen RC, Crowley JN, Day DA, Donahue NM, Fry JL, Fuchs H, Griffin RJ, Guzman MI, Herrmann H, Hodzic A, Iinuma Y, Jimenez JL, Kiendler-Scharr A, Lee BH, Luecken DJ, Mao J, McLaren R, Mutzel A, Osthoff HD, Ouyang B, Picquet-Varrault B, Platt U, Pye HOT, Rudich Y, Schwantes RH, Shiraiwa M, Stutz J, Thornton JA, Tilgner A, Williams BJ, Zaveri RA. Nitrate radicals and biogenic volatile organic compounds: oxidation, mechanisms, and organic aerosol. ATMOSPHERIC CHEMISTRY AND PHYSICS 2017; 17:2103-2162. [PMID: 30147712 PMCID: PMC6104845 DOI: 10.5194/acp-17-2103-2017] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Oxidation of biogenic volatile organic compounds (BVOC) by the nitrate radical (NO3) represents one of the important interactions between anthropogenic emissions related to combustion and natural emissions from the biosphere. This interaction has been recognized for more than 3 decades, during which time a large body of research has emerged from laboratory, field, and modeling studies. NO3-BVOC reactions influence air quality, climate and visibility through regional and global budgets for reactive nitrogen (particularly organic nitrates), ozone, and organic aerosol. Despite its long history of research and the significance of this topic in atmospheric chemistry, a number of important uncertainties remain. These include an incomplete understanding of the rates, mechanisms, and organic aerosol yields for NO3-BVOC reactions, lack of constraints on the role of heterogeneous oxidative processes associated with the NO3 radical, the difficulty of characterizing the spatial distributions of BVOC and NO3 within the poorly mixed nocturnal atmosphere, and the challenge of constructing appropriate boundary layer schemes and non-photochemical mechanisms for use in state-of-the-art chemical transport and chemistry-climate models. This review is the result of a workshop of the same title held at the Georgia Institute of Technology in June 2015. The first half of the review summarizes the current literature on NO3-BVOC chemistry, with a particular focus on recent advances in instrumentation and models, and in organic nitrate and secondary organic aerosol (SOA) formation chemistry. Building on this current understanding, the second half of the review outlines impacts of NO3-BVOC chemistry on air quality and climate, and suggests critical research needs to better constrain this interaction to improve the predictive capabilities of atmospheric models.
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Affiliation(s)
- Nga Lee Ng
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Steven S. Brown
- NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, USA
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
| | | | - Elliot Atlas
- Department of Atmospheric Sciences, RSMAS, University of Miami, Miami, FL, USA
| | - Ronald C. Cohen
- Department of Chemistry, University of California at Berkeley, Berkeley, CA, USA
| | - John N. Crowley
- Max-Planck-Institut für Chemie, Division of Atmospheric Chemistry, Mainz, Germany
| | - Douglas A. Day
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - Neil M. Donahue
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Juliane L. Fry
- Department of Chemistry, Reed College, Portland, OR, USA
| | - Hendrik Fuchs
- Institut für Energie und Klimaforschung: Troposphäre (IEK-8), Forschungszentrum Jülich, Jülich, Germany
| | - Robert J. Griffin
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
| | | | - Hartmut Herrmann
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, Leipzig, Germany
| | - Alma Hodzic
- Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, CO, USA
| | - Yoshiteru Iinuma
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, Leipzig, Germany
| | - José L. Jimenez
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - Astrid Kiendler-Scharr
- Institut für Energie und Klimaforschung: Troposphäre (IEK-8), Forschungszentrum Jülich, Jülich, Germany
| | - Ben H. Lee
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
| | - Deborah J. Luecken
- National Exposure Research Laboratory, US Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Jingqiu Mao
- Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, USA
- Geophysical Fluid Dynamics Laboratory/National Oceanic and Atmospheric Administration, Princeton, NJ, USA
| | - Robert McLaren
- Centre for Atmospheric Chemistry, York University, Toronto, Ontario, Canada
| | - Anke Mutzel
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, Leipzig, Germany
| | - Hans D. Osthoff
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada
| | - Bin Ouyang
- Department of Chemistry, University of Cambridge, Cambridge, UK
| | - Benedicte Picquet-Varrault
- Laboratoire Interuniversitaire des Systemes Atmospheriques (LISA), CNRS, Universities of Paris-Est Créteil and ì Paris Diderot, Institut Pierre Simon Laplace (IPSL), Créteil, France
| | - Ulrich Platt
- Institute of Environmental Physics, University of Heidelberg, Heidelberg, Germany
| | - Havala O. T. Pye
- National Exposure Research Laboratory, US Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Yinon Rudich
- Department of Earth and Planetary Sciences, Weizmann Institute, Rehovot, Israel
| | - Rebecca H. Schwantes
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
| | - Manabu Shiraiwa
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | - Jochen Stutz
- Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USA
| | - Joel A. Thornton
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
| | - Andreas Tilgner
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, Leipzig, Germany
| | - Brent J. Williams
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Rahul A. Zaveri
- Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA
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20
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Sadanaga Y, Takaji R, Ishiyama A, Nakajima K, Matsuki A, Bandow H. Thermal dissociation cavity attenuated phase shift spectroscopy for continuous measurement of total peroxy and organic nitrates in the clean atmosphere. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:074102. [PMID: 27475571 DOI: 10.1063/1.4958167] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A thermal dissociation cavity attenuated phase shift spectroscopy (TD-CAPS) instrument was developed for measuring total peroxy nitrates (PNs) and organic nitrates (ONs) concentrations in the clean atmosphere. This instrument is easy to operate and can be applied to continuous measurement of PNs and ONs. A continuously measurable system is convenient to perform observations, especially in remote areas. Three lines (NO2, PNs, and ONs lines) were used for thermal dissociation. The NO2 line contains a quartz tube that is not heated, while the PN and ON lines contain quartz tubes that are heated at 433 K and 633 K, respectively. The concentrations of NO2, NO2 + PNs, and NO2 + PNs + ONs can be obtained from the NO2, PN, and ON lines, respectively. The lower limit values of the detection limit (3σ) for PNs and ONs were estimated to be 21 parts per trillion by volume with an integration time of 2 min. PNs were selectively thermally decomposed in the PNs line and formed NO2 quantitatively. In the ONs line, both PNs and ONs were thermally decomposed to produce NO2 quantitatively, but partial decomposition of HNO3 at 633 K interfered with the ONs measurement. Therefore, a HNO3 scrubber is required before the ONs line. Continuous observations were conducted with the TD-CAPS instrument in a remote area, and the instrument performed well for obtaining PNs and ONs concentrations.
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Affiliation(s)
- Yasuhiro Sadanaga
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Ryo Takaji
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Ayana Ishiyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kazuo Nakajima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Atsushi Matsuki
- Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Hiroshi Bandow
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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21
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Highly functionalized organic nitrates in the southeast United States: Contribution to secondary organic aerosol and reactive nitrogen budgets. Proc Natl Acad Sci U S A 2016; 113:1516-21. [PMID: 26811465 DOI: 10.1073/pnas.1508108113] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Speciated particle-phase organic nitrates (pONs) were quantified using online chemical ionization MS during June and July of 2013 in rural Alabama as part of the Southern Oxidant and Aerosol Study. A large fraction of pONs is highly functionalized, possessing between six and eight oxygen atoms within each carbon number group, and is not the common first generation alkyl nitrates previously reported. Using calibrations for isoprene hydroxynitrates and the measured molecular compositions, we estimate that pONs account for 3% and 8% of total submicrometer organic aerosol mass, on average, during the day and night, respectively. Each of the isoprene- and monoterpenes-derived groups exhibited a strong diel trend consistent with the emission patterns of likely biogenic hydrocarbon precursors. An observationally constrained diel box model can replicate the observed pON assuming that pONs (i) are produced in the gas phase and rapidly establish gas-particle equilibrium and (ii) have a short particle-phase lifetime (∼2-4 h). Such dynamic behavior has significant implications for the production and phase partitioning of pONs, organic aerosol mass, and reactive nitrogen speciation in a forested environment.
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22
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Fisher JA, Jacob DJ, Travis KR, Kim PS, Marais EA, Miller CC, Yu K, Zhu L, Yantosca RM, Sulprizio MP, Mao J, Wennberg PO, Crounse JD, Teng AP, Nguyen TB, St Clair JM, Cohen RC, Romer P, Nault BA, Wooldridge PJ, Jimenez JL, Campuzano-Jost P, Day DA, Hu W, Shepson PB, Xiong F, Blake DR, Goldstein AH, Misztal PK, Hanisco TF, Wolfe GM, Ryerson TB, Wisthaler A, Mikoviny T. Organic nitrate chemistry and its implications for nitrogen budgets in an isoprene- and monoterpene-rich atmosphere: constraints from aircraft (SEAC 4RS) and ground-based (SOAS) observations in the Southeast US. ATMOSPHERIC CHEMISTRY AND PHYSICS 2016; 16:5969-5991. [PMID: 29681921 PMCID: PMC5906813 DOI: 10.5194/acp-16-5969-2016] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Formation of organic nitrates (RONO2) during oxidation of biogenic volatile organic compounds (BVOCs: isoprene, monoterpenes) is a significant loss pathway for atmospheric nitrogen oxide radicals (NOx), but the chemistry of RONO2 formation and degradation remains uncertain. Here we implement a new BVOC oxidation mechanism (including updated isoprene chemistry, new monoterpene chemistry, and particle uptake of RONO2) in the GEOS-Chem global chemical transport model with ∼25 × 25 km2 resolution over North America. We evaluate the model using aircraft (SEAC4RS) and ground-based (SOAS) observations of NOx, BVOCs, and RONO2 from the Southeast US in summer 2013. The updated simulation successfully reproduces the concentrations of individual gas- and particle-phase RONO2 species measured during the campaigns. Gas-phase isoprene nitrates account for 25-50% of observed RONO2 in surface air, and we find that another 10% is contributed by gas-phase monoterpene nitrates. Observations in the free troposphere show an important contribution from long-lived nitrates derived from anthropogenic VOCs. During both campaigns, at least 10% of observed boundary layer RONO2 were in the particle phase. We find that aerosol uptake followed by hydrolysis to HNO3 accounts for 60% of simulated gas-phase RONO2 loss in the boundary layer. Other losses are 20% by photolysis to recycle NOx and 15% by dry deposition. RONO2 production accounts for 20% of the net regional NOx sink in the Southeast US in summer, limited by the spatial segregation between BVOC and NOx emissions. This segregation implies that RONO2 production will remain a minor sink for NOx in the Southeast US in the future even as NOx emissions continue to decline.
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Affiliation(s)
- J A Fisher
- Centre for Atmospheric Chemistry, School of Chemistry, University of Wollongong, Wollongong, NSW, Australia
- School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW, Australia
| | - D J Jacob
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
| | - K R Travis
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - P S Kim
- Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
| | - E A Marais
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - C Chan Miller
- Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
| | - K Yu
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - L Zhu
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - R M Yantosca
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - M P Sulprizio
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - J Mao
- Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, USA
- Geophysical Fluid Dynamics Laboratory/National Oceanic and Atmospheric Administration, Princeton, NJ, USA
| | - P O Wennberg
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
| | - J D Crounse
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
| | - A P Teng
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
| | - T B Nguyen
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
- Now at Department of Environmental Toxicology, University of California at Davis, Davis, CA, USA
| | - J M St Clair
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
- Now at Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA and Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD, USA
| | - R C Cohen
- Department of Chemistry, University of California at Berkeley, Berkeley, CA, USA
- Department of Earth and Planetary Science, University of California at Berkeley, Berkeley, CA, USA
| | - P Romer
- Department of Chemistry, University of California at Berkeley, Berkeley, CA, USA
| | - B A Nault
- Department of Earth and Planetary Science, University of California at Berkeley, Berkeley, CA, USA
- Now at Department of Chemistry and Biochemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - P J Wooldridge
- Department of Chemistry, University of California at Berkeley, Berkeley, CA, USA
| | - J L Jimenez
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - P Campuzano-Jost
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - D A Day
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - W Hu
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - P B Shepson
- Department of Chemistry, Purdue University, West Lafayette, IN, USA
- Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN, USA
| | - F Xiong
- Department of Chemistry, Purdue University, West Lafayette, IN, USA
| | - D R Blake
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | - A H Goldstein
- Department of Environmental Science, Policy, and Management, University of California at Berkeley, Berkeley, CA, USA
- Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, CA, USA
| | - P K Misztal
- Department of Environmental Science, Policy, and Management, University of California at Berkeley, Berkeley, CA, USA
| | - T F Hanisco
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - G M Wolfe
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD, USA
| | - T B Ryerson
- Chemical Sciences Division, Earth System Research Lab, National Oceanic and Atmospheric Administration, Boulder, CO, USA
| | - A Wisthaler
- Department of Chemistry, University of Oslo, Oslo, Norway
- Institute for Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Austria
| | - T Mikoviny
- Department of Chemistry, University of Oslo, Oslo, Norway
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23
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Nault BA, Garland C, Wooldridge PJ, Brune WH, Campuzano-Jost P, Crounse JD, Day DA, Dibb J, Hall SR, Huey LG, Jimenez JL, Liu X, Mao J, Mikoviny T, Peischl J, Pollack IB, Ren X, Ryerson TB, Scheuer E, Ullmann K, Wennberg PO, Wisthaler A, Zhang L, Cohen RC. Observational Constraints on the Oxidation of NOx in the Upper Troposphere. J Phys Chem A 2015; 120:1468-78. [DOI: 10.1021/acs.jpca.5b07824] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - William H. Brune
- Department
of Meteorology, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Pedro Campuzano-Jost
- Cooperative
Institute for Research in the Environmental Sciences and Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | | | - Douglas A. Day
- Cooperative
Institute for Research in the Environmental Sciences and Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Jack Dibb
- Earth
Systems Research Center, Institute for the Study of Earth Oceans and
Space, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Samuel R. Hall
- Atmospheric
Chemistry Division, National Center for Atmospheric Research (NCAR), Boulder, Colorado 80307, United States
| | - L. Gregory Huey
- School of
Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - José L. Jimenez
- Cooperative
Institute for Research in the Environmental Sciences and Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Xiaoxi Liu
- School of
Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Jingqiu Mao
- Geophyiscal
Fluid Dynamics Laboratory, National Oceanic and Atmospheric Administration, Princeton, New Jersey 08540, United States
| | - Tomas Mikoviny
- Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, United States
| | - Jeff Peischl
- Chemical
Sciences Division, Earth System Research Lab, National Oceanic and Atmospheric Administration, Boulder, Colorado 80305, United States
| | - Ilana B. Pollack
- Chemical
Sciences Division, Earth System Research Lab, National Oceanic and Atmospheric Administration, Boulder, Colorado 80305, United States
| | - Xinrong Ren
- Air Resources
Laboratory, National Oceanic and Atmospheric Administration, College Park, Maryland 20740, United States
| | - Thomas B. Ryerson
- Chemical
Sciences Division, Earth System Research Lab, National Oceanic and Atmospheric Administration, Boulder, Colorado 80305, United States
| | - Eric Scheuer
- Earth
Systems Research Center, Institute for the Study of Earth Oceans and
Space, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Kirk Ullmann
- Atmospheric
Chemistry Division, National Center for Atmospheric Research (NCAR), Boulder, Colorado 80307, United States
| | | | - Armin Wisthaler
- Institute
of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Li Zhang
- Department
of Meteorology, Pennsylvania State University, University Park, Pennsylvania 16802, United States
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24
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Wild RJ, Edwards PM, Dubé WP, Baumann K, Edgerton ES, Quinn PK, Roberts JM, Rollins AW, Veres PR, Warneke C, Williams EJ, Yuan B, Brown SS. A measurement of total reactive nitrogen, NOy, together with NO₂, NO, and O₃ via cavity ring-down spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:9609-15. [PMID: 25019919 DOI: 10.1021/es501896w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We present a sensitive, compact detector that measures total reactive nitrogen (NOy), as well as NO2, NO, and O3. In all channels, NO2 is directly detected by laser diode based cavity ring-down spectroscopy (CRDS) at 405 nm. Ambient O3 is converted to NO2 in excess NO for the O3 measurement channel. Likewise, ambient NO is converted to NO2 in excess O3. Ambient NOy is thermally dissociated at ∼700 °C to form NO2 or NO in a heated quartz inlet. Any NO present in ambient air or formed from thermal dissociation of other reactive nitrogen compounds is converted to NO2 in excess O3 after the thermal converter. We measured thermal dissociation profiles for six of the major NOy components and compared ambient measurements with other instruments during field campaigns in Utah and Alabama. Alabama measurements were made in a rural location with high biogenic emissions, and Utah measurements were made in the wintertime in unusual conditions that form high ozone levels from emissions related to oil and gas production. The NOy comparison in Alabama, to an accepted standard measurement method (a molybdenum catalytic converter/chemiluminescence instrument), agreed to within 12%, which we define as an upper limit to the accuracy of the NOy channel. The 1σ precision is <30 pptv at 1 s and <4 pptv at 1 min time resolution for all measurement channels. The accuracy is 3% for the NO2 and O3 channels and 5% for the NO channel. The precision and accuracy of this instrument make it a versatile alternative to standard chemiluminescence-based NOy instruments.
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Affiliation(s)
- Robert J Wild
- Cooperative Institute for Research in the Environmental Sciences, University of Colorado , Boulder, Colorado 80309, United States
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Sadanaga Y, Suzuki K, Yoshimoto T, Bandow H. Direct measurement system of nitrogen dioxide in the atmosphere using a blue light-emitting diode induced fluorescence technique. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:064101. [PMID: 24985825 DOI: 10.1063/1.4879821] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An instrument for measuring atmospheric nitrogen dioxide has been developed by a light-emitting diode induced fluorescence (LED-IF) technique. Air was introduced into a fluorescence detection cell. A pulsed blue light LED with a peak wavelength of 430 nm was irradiated to excite NO2 molecules in this cell. Fluorescence emitted from excited NO2 molecules was detected by a dynode-gated photomultiplier tube. The current detection limit of the LED-IF instrument was estimated to be 7.0 and 0.91 ppbv (parts per billion by volume) at 1-min and 1-h integration times, respectively, with a signal to noise ratio of 2. This result indicates that this LED-IF instrument can measure sufficiently precise 1-h values of NO2 concentrations in the urban atmosphere. An NO2 test observation and an intercomparison of the LED-IF instrument with an NO2 measurement system based on a photolytic converter/NO-O3 chemiluminescence method were performed in the urban atmosphere. Concentration differences between the two methods were within ±25% for about 90% of the data. It has been demonstrated by these observations that NO2 concentrations can be observed in the urban areas using the LED-IF instrument.
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Affiliation(s)
- Yasuhiro Sadanaga
- Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kazunari Suzuki
- Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Takatoshi Yoshimoto
- Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Hiroshi Bandow
- Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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26
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Worton DR, Surratt JD, Lafranchi BW, Chan AWH, Zhao Y, Weber RJ, Park JH, Gilman JB, de Gouw J, Park C, Schade G, Beaver M, Clair JMS, Crounse J, Wennberg P, Wolfe GM, Harrold S, Thornton JA, Farmer DK, Docherty KS, Cubison MJ, Jimenez JL, Frossard AA, Russell LM, Kristensen K, Glasius M, Mao J, Ren X, Brune W, Browne EC, Pusede SE, Cohen RC, Seinfeld JH, Goldstein AH. Observational insights into aerosol formation from isoprene. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:11403-11413. [PMID: 24004194 DOI: 10.1021/es4011064] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Atmospheric photooxidation of isoprene is an important source of secondary organic aerosol (SOA) and there is increasing evidence that anthropogenic oxidant emissions can enhance this SOA formation. In this work, we use ambient observations of organosulfates formed from isoprene epoxydiols (IEPOX) and methacrylic acid epoxide (MAE) and a broad suite of chemical measurements to investigate the relative importance of nitrogen oxide (NO/NO2) and hydroperoxyl (HO2) SOA formation pathways from isoprene at a forested site in California. In contrast to IEPOX, the calculated production rate of MAE was observed to be independent of temperature. This is the result of the very fast thermolysis of MPAN at high temperatures that affects the distribution of the MPAN reservoir (MPAN / MPA radical) reducing the fraction that can react with OH to form MAE and subsequently SOA (F(MAE formation)). The strong temperature dependence of F(MAE formation) helps to explain our observations of similar concentrations of IEPOX-derived organosulfates (IEPOX-OS; ~1 ng m(-3)) and MAE-derived organosulfates (MAE-OS; ~1 ng m(-3)) under cooler conditions (lower isoprene concentrations) and much higher IEPOX-OS (~20 ng m(-3)) relative to MAE-OS (<0.0005 ng m(-3)) at higher temperatures (higher isoprene concentrations). A kinetic model of IEPOX and MAE loss showed that MAE forms 10-100 times more ring-opening products than IEPOX and that both are strongly dependent on aerosol water content when aerosol pH is constant. However, the higher fraction of MAE ring opening products does not compensate for the lower MAE production under warmer conditions (higher isoprene concentrations) resulting in lower formation of MAE-derived products relative to IEPOX at the surface. In regions of high NOx, high isoprene emissions and strong vertical mixing the slower MPAN thermolysis rate aloft could increase the fraction of MPAN that forms MAE resulting in a vertically varying isoprene SOA source.
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Affiliation(s)
- David R Worton
- Department of Environmental Science, Policy and Management, ∥Department of Chemistry, University of California , Berkeley, California 94720, United States
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Kim S, Guenther A, Apel E. Quantitative and qualitative sensing techniques for biogenic volatile organic compounds and their oxidation products. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2013; 15:1301-1314. [PMID: 23748571 DOI: 10.1039/c3em00040k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The physiological production mechanisms of some of the organics in plants, commonly known as biogenic volatile organic compounds (BVOCs), have been known for more than a century. Some BVOCs are emitted to the atmosphere and play a significant role in tropospheric photochemistry especially in ozone and secondary organic aerosol (SOA) productions as a result of interplays between BVOCs and atmospheric radicals such as hydroxyl radical (OH), ozone (O3) and NOX (NO + NO2). These findings have been drawn from comprehensive analysis of numerous field and laboratory studies that have characterized the ambient distribution of BVOCs and their oxidation products, and reaction kinetics between BVOCs and atmospheric oxidants. These investigations are limited by the capacity for identifying and quantifying these compounds. This review highlights the major analytical techniques that have been used to observe BVOCs and their oxidation products such as gas chromatography, mass spectrometry with hard and soft ionization methods, and optical techniques from laser induced fluorescence (LIF) to remote sensing. In addition, we discuss how new analytical techniques can advance our understanding of BVOC photochemical processes. The principles, advantages, and drawbacks of the analytical techniques are discussed along with specific examples of how the techniques were applied in field and laboratory measurements. Since a number of thorough review papers for each specific analytical technique are available, readers are referred to these publications rather than providing thorough descriptions of each technique. Therefore, the aim of this review is for readers to grasp the advantages and disadvantages of various sensing techniques for BVOCs and their oxidation products and to provide guidance for choosing the optimal technique for a specific research task.
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Affiliation(s)
- Saewung Kim
- Department of Earth System Science, School of Physical Sciences, University of California, Irvine, Irvine, CA 92697, USA.
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28
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Perring AE, Pusede SE, Cohen RC. An Observational Perspective on the Atmospheric Impacts of Alkyl and Multifunctional Nitrates on Ozone and Secondary Organic Aerosol. Chem Rev 2013; 113:5848-70. [DOI: 10.1021/cr300520x] [Citation(s) in RCA: 150] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. E. Perring
- Department
of Chemistry, and ‡Department of Earth and Planetary Sciences, University of California Berkeley, Berkeley, California
94720, United States
| | - S. E. Pusede
- Department
of Chemistry, and ‡Department of Earth and Planetary Sciences, University of California Berkeley, Berkeley, California
94720, United States
| | - R. C. Cohen
- Department
of Chemistry, and ‡Department of Earth and Planetary Sciences, University of California Berkeley, Berkeley, California
94720, United States
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29
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Lee L, Wooldridge P, Nah T, Wilson K, Cohen R. Observation of rates and products in the reaction of NO3with submicron squalane and squalene aerosol. Phys Chem Chem Phys 2013. [DOI: 10.1039/c2cp42500a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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30
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Carn SA, Froyd KD, Anderson BE, Wennberg P, Crounse J, Spencer K, Dibb JE, Krotkov NA, Browell EV, Hair JW, Diskin G, Sachse G, Vay SA. In situ measurements of tropospheric volcanic plumes in Ecuador and Colombia during TC4. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jd014718] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Sadanaga Y, Fukumori Y, Kobashi T, Nagata M, Takenaka N, Bandow H. Development of a Selective Light-Emitting Diode Photolytic NO2 Converter for Continuously Measuring NO2 in the Atmosphere. Anal Chem 2010; 82:9234-9. [DOI: 10.1021/ac101703z] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yasuhiro Sadanaga
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Yuki Fukumori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Tadashi Kobashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Makoto Nagata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Norimichi Takenaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Hiroshi Bandow
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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32
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Farmer DK, Jimenez JL. Real-time Atmospheric Chemistry Field Instrumentation. Anal Chem 2010; 82:7879-84. [DOI: 10.1021/ac1010603] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Farmer DK, Matsunaga A, Docherty KS, Surratt JD, Seinfeld JH, Ziemann PJ, Jimenez JL. Response of an aerosol mass spectrometer to organonitrates and organosulfates and implications for atmospheric chemistry. Proc Natl Acad Sci U S A 2010; 107:6670-5. [PMID: 20194777 PMCID: PMC2872396 DOI: 10.1073/pnas.0912340107] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Organonitrates (ON) are important products of gas-phase oxidation of volatile organic compounds in the troposphere; some models predict, and laboratory studies show, the formation of large, multifunctional ON with vapor pressures low enough to partition to the particle phase. Organosulfates (OS) have also been recently detected in secondary organic aerosol. Despite their potential importance, ON and OS remain a nearly unexplored aspect of atmospheric chemistry because few studies have quantified particulate ON or OS in ambient air. We report the response of a high-resolution time-of-flight aerosol mass spectrometer (AMS) to aerosol ON and OS standards and mixtures. We quantify the potentially substantial underestimation of organic aerosol O/C, commonly used as a metric for aging, and N/C. Most of the ON-nitrogen appears as NO(x)+ ions in the AMS, which are typically dominated by inorganic nitrate. Minor organonitrogen ions are observed although their identity and intensity vary between standards. We evaluate the potential for using NO(x)+ fragment ratios, organonitrogen ions, HNO(3)+ ions, the ammonium balance of the nominally inorganic ions, and comparison to ion-chromatography instruments to constrain the concentrations of ON for ambient datasets, and apply these techniques to a field study in Riverside, CA. OS manifests as separate organic and sulfate components in the AMS with minimal organosulfur fragments and little difference in fragmentation from inorganic sulfate. The low thermal stability of ON and OS likely causes similar detection difficulties for other aerosol mass spectrometers using vaporization and/or ionization techniques with similar or larger energy, which has likely led to an underappreciation of these species.
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Affiliation(s)
- D. K. Farmer
- Cooperative Institute for Research in Environmental Sciences and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309
| | - A. Matsunaga
- Air Pollution Research Center and Department of Chemistry, University of California, Riverside, CA 92521
| | - K. S. Docherty
- Cooperative Institute for Research in Environmental Sciences and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309
| | - J. D. Surratt
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125; and
| | - J. H. Seinfeld
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125; and
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125
| | - P. J. Ziemann
- Air Pollution Research Center and Department of Chemistry, University of California, Riverside, CA 92521
| | - J. L. Jimenez
- Cooperative Institute for Research in Environmental Sciences and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309
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34
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Hains JC, Boersma KF, Kroon M, Dirksen RJ, Cohen RC, Perring AE, Bucsela E, Volten H, Swart DPJ, Richter A, Wittrock F, Schoenhardt A, Wagner T, Ibrahim OW, van Roozendael M, Pinardi G, Gleason JF, Veefkind JP, Levelt P. Testing and improving OMI DOMINO tropospheric NO2using observations from the DANDELIONS and INTEX-B validation campaigns. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd012399] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Paul D, Furgeson A, Osthoff HD. Measurements of total peroxy and alkyl nitrate abundances in laboratory-generated gas samples by thermal dissociation cavity ring-down spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2009; 80:114101. [PMID: 19947740 DOI: 10.1063/1.3258204] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel measurement technique, thermal dissociation cavity ring-down spectroscopy (TD-CRDS), for rapid (1 s time resolution) and sensitive (precision approximately 100 parts per trillion by volume (10(-12); pptv)) quantification of total peroxy nitrate (SigmaPN) and total alkyl nitrate (SigmaAN) abundances in laboratory-generated gas mixtures is described. The organic nitrates are dissociated in a heated inlet to produce NO(2), whose concentration is monitored by pulsed-laser CRDS at 532 nm. Mixing ratios are determined by difference relative to a cold inlet reference channel. Conversion of laboratory-generated mixtures of AN in zero air (at an inlet temperature of 450 degrees C) is quantitative over a wide range of mixing ratios (0-100 parts per billion by volume (10(-9), ppbv)), as judged from simultaneous measurements of NO(y) using a commercial NO-O(3) chemiluminescence monitor. Conversion of PN is quantitative up to about 4 ppbv (at an inlet temperature of 250 degrees C); at higher concentrations, the measurements are affected by recombination reactions of the dissociation products. The results imply that TD-CRDS can be used as a generic detector of dilute mixtures of organic nitrates in air at near-ambient concentration levels in laboratory experiments. Potential applications of the TD-CRDS technique in the laboratory are discussed.
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Affiliation(s)
- Dipayan Paul
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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36
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Millet DB, Atlas EL, Blake DR, Blake NJ, Diskin GS, Holloway JS, Hudman RC, Meinardi S, Ryerson TB, Sachse GW. Halocarbon emissions from the United States and Mexico and their global warming potential. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2009; 43:1055-1060. [PMID: 19320157 DOI: 10.1021/es802146j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We use recent aircraft measurements of a comprehensive suite of anthropogenic halocarbons, carbon monoxide (CO), and related tracers to place new constraints on North American halocarbon emissions and quantify their global warming potential. Using a chemical transport model (GEOS-Chem) we find that the ensemble of observations are consistent with our prior best estimate of the U.S. anthropogenic CO source, but suggest a 30% underestimate of Mexican emissions. We develop an optimized CO emission inventory on this basis and quantify halocarbon emissions from their measured enhancements relative to CO. Emissions continue for many compounds restricted under the Montreal Protocol, and we show that halocarbons make up an important fraction of the total greenhouse gas source for both countries: our best estimate is 9% (uncertainty range 6-12%) and 32% (21-52%) of equivalent CO2 emissions for the U.S. and Mexico, respectively, on a 20 year time scale. Performance of bottom-up emission inventories is variable, with underestimates for some compounds and overestimates for others. Ongoing methylchloroform emissions are significant in the U.S. (2.8 Gg/y in 2004-2006), in contrast to bottom-up estimates (< 0.05 Gg), with implications for tropospheric OH calculations. Mexican methylchloroform emissions are minor.
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Affiliation(s)
- Dylan B Millet
- University of Minnesota, St. Paul, Minnesota 55108, USA.
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37
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Kondo Y, Morino Y, Fukuda M, Kanaya Y, Miyazaki Y, Takegawa N, Tanimoto H, McKenzie R, Johnston P, Blake DR, Murayama T, Koike M. Formation and transport of oxidized reactive nitrogen, ozone, and secondary organic aerosol in Tokyo. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008jd010134] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Steinbacher M, Zellweger C, Schwarzenbach B, Bugmann S, Buchmann B, Ordóñez C, Prevot ASH, Hueglin C. Nitrogen oxide measurements at rural sites in Switzerland: Bias of conventional measurement techniques. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007971] [Citation(s) in RCA: 195] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Horowitz LW, Fiore AM, Milly GP, Cohen RC, Perring A, Wooldridge PJ, Hess PG, Emmons LK, Lamarque JF. Observational constraints on the chemistry of isoprene nitrates over the eastern United States. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007747] [Citation(s) in RCA: 176] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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Singh HB, Salas L, Herlth D, Kolyer R, Czech E, Avery M, Crawford JH, Pierce RB, Sachse GW, Blake DR, Cohen RC, Bertram TH, Perring A, Wooldridge PJ, Dibb J, Huey G, Hudman RC, Turquety S, Emmons LK, Flocke F, Tang Y, Carmichael GR, Horowitz LW. Reactive nitrogen distribution and partitioning in the North American troposphere and lowermost stratosphere. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007664] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Patchen AK, Pennino MJ, Kiep AC, Elrod MJ. Direct kinetics study of the product-forming channels of the reaction of isoprene-derived hydroxyperoxy radicals with NO. INT J CHEM KINET 2007. [DOI: 10.1002/kin.20248] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Singh HB, Brune WH, Crawford JH, Jacob DJ, Russell PB. Overview of the summer 2004 Intercontinental Chemical Transport Experiment–North America (INTEX-A). ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007905] [Citation(s) in RCA: 208] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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43
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Fehsenfeld FC, Ancellet G, Bates TS, Goldstein AH, Hardesty RM, Honrath R, Law KS, Lewis AC, Leaitch R, McKeen S, Meagher J, Parrish DD, Pszenny AAP, Russell PB, Schlager H, Seinfeld J, Talbot R, Zbinden R. International Consortium for Atmospheric Research on Transport and Transformation (ICARTT): North America to Europe-Overview of the 2004 summer field study. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007829] [Citation(s) in RCA: 205] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - G. Ancellet
- Service d'Aéronomie du Centre Nationale de la Recherche Scientifique; Institut Pierre Simon Laplace/Université Pierre et Marie Curie; Paris France
| | - T. S. Bates
- Pacific Marine Environmental Laboratory; NOAA; Seattle Washington USA
| | - A. H. Goldstein
- Department of Environmental Science, Policy and Management; University of California; Berkeley California USA
| | - R. M. Hardesty
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - R. Honrath
- Department of Civil and Environmental Engineering; Michigan Technological University; Houghton Michigan USA
| | - K. S. Law
- Service d'Aéronomie du Centre Nationale de la Recherche Scientifique; Institut Pierre Simon Laplace/Université Pierre et Marie Curie; Paris France
| | - A. C. Lewis
- Department of Chemistry; University of York; York UK
| | - R. Leaitch
- Science and Technology Branch; Environment Canada; Toronto, Ontario Canada
| | - S. McKeen
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - J. Meagher
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - D. D. Parrish
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - A. A. P. Pszenny
- Institute for the Study of Earth, Oceans and Space; University of New Hampshire; Durham New Hampshire USA
| | - P. B. Russell
- NASA Ames Research Center; Moffett Field California USA
| | - H. Schlager
- Deutsches Zentrum für Luft- und Raumfahrt; Oberpfaffenhofen, Wessling Germany
| | - J. Seinfeld
- Departments of Environmental Science and Engineering and Chemical Engineering; California Institute of Technology; Pasadena California USA
| | - R. Talbot
- Institute for the Study of Earth, Oceans and Space; University of New Hampshire; Durham New Hampshire USA
| | - R. Zbinden
- Laboratoire d'Aérologie, Observatoire Midi-Pyrénées; UMR 5560, Centre Nationale de la Recherche Scientifique/Université Paul Sabatier; Toulouse France
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44
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Methven J, Arnold SR, Stohl A, Evans MJ, Avery M, Law K, Lewis AC, Monks PS, Parrish DD, Reeves CE, Schlager H, Atlas E, Blake DR, Coe H, Crosier J, Flocke FM, Holloway JS, Hopkins JR, McQuaid J, Purvis R, Rappenglück B, Singh HB, Watson NM, Whalley LK, Williams PI. Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007540] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- J. Methven
- Department of Meteorology; University of Reading; Reading UK
| | - S. R. Arnold
- School of Earth and Environment; University of Leeds; Leeds UK
| | - A. Stohl
- Norwegian Institute for Air Research; Kjeller Norway
| | - M. J. Evans
- School of Earth and Environment; University of Leeds; Leeds UK
| | - M. Avery
- NASA Langley Research Center; Hampton Virginia USA
| | - K. Law
- Service d'Aéronomie, Centre National de la Recherche Scientifique; Université Pierre et Marie Curie; Paris France
| | - A. C. Lewis
- Department of Chemistry; University of York; York UK
| | - P. S. Monks
- Department of Chemistry; University of Leicester; Leicester UK
| | - D. D. Parrish
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - C. E. Reeves
- School of Environmental Sciences; University of East Anglia; Norwich UK
| | - H. Schlager
- Deutsches Zentrum für Luft- und Raumfahrt; Oberpfaffenhofen Germany
| | - E. Atlas
- Rosenstiel School of Marine and Atmospheric Science; University of Miami; Miami Florida USA
| | - D. R. Blake
- Department of Chemistry; University of California; Irvine California USA
| | - H. Coe
- School of Earth, Atmospheric and Environmental Sciences; University of Manchester; Manchester UK
| | - J. Crosier
- School of Earth, Atmospheric and Environmental Sciences; University of Manchester; Manchester UK
| | - F. M. Flocke
- Atmospheric Chemistry Division; National Center for Atmospheric Research; Boulder Colorado USA
| | - J. S. Holloway
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - J. R. Hopkins
- Department of Chemistry; University of York; York UK
| | - J. McQuaid
- School of Earth and Environment; University of Leeds; Leeds UK
| | - R. Purvis
- Facility for Airborne Atmospheric Measurements; Cranfield UK
| | - B. Rappenglück
- Institute of Meteorology and Climate Research; Forschungszentrum Karlsruhe; Garmisch-Partenkirchen Germany
| | - H. B. Singh
- NASA Ames Research Center; Moffett Field California USA
| | - N. M. Watson
- Department of Chemistry; University of York; York UK
| | | | - P. I. Williams
- School of Earth, Atmospheric and Environmental Sciences; University of Manchester; Manchester UK
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45
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Millet DB, Goldstein AH, Holzinger R, Williams BJ, Allan JD, Jimenez JL, Worsnop DR, Roberts JM, White AB, Hudman RC, Bertschi IT, Stohl A. Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007287] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dylan B. Millet
- Division of Ecosystem Sciences; University of California; Berkeley California USA
| | - Allen H. Goldstein
- Division of Ecosystem Sciences; University of California; Berkeley California USA
| | - Rupert Holzinger
- Division of Ecosystem Sciences; University of California; Berkeley California USA
| | - Brent J. Williams
- Division of Ecosystem Sciences; University of California; Berkeley California USA
| | - James D. Allan
- School of Earth, Atmospheric and Environmental Science; University of Manchester; Manchester UK
| | - José L. Jimenez
- Department of Chemistry; University of Colorado; Boulder Colorado USA
| | | | | | - Allen B. White
- NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - Rynda C. Hudman
- Division of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts USA
| | - Isaac T. Bertschi
- Department of Interdisciplinary Arts and Sciences; University of Washington; Bothell Washington USA
| | - Andreas Stohl
- Norwegian Institute for Air Research; Kjeller Norway
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Lee A, Goldstein AH, Kroll JH, Ng NL, Varutbangkul V, Flagan RC, Seinfeld JH. Gas-phase products and secondary aerosol yields from the photooxidation of 16 different terpenes. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007050] [Citation(s) in RCA: 285] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Slusher DL. A thermal dissociation–chemical ionization mass spectrometry (TD-CIMS) technique for the simultaneous measurement of peroxyacyl nitrates and dinitrogen pentoxide. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2004jd004670] [Citation(s) in RCA: 232] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Grossenbacher JW. A comparison of isoprene nitrate concentrations at two forest-impacted sites. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jd003966] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sadanaga Y, Matsumoto J, Kajii Y. Photochemical reactions in the urban air: Recent understandings of radical chemistry. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2003. [DOI: 10.1016/s1389-5567(03)00006-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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