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Marais EA, Jacob DJ, Kurosu TP, Chance K, Murphy JG, Reeves C, Mills G, Casadio S, Millet DB, Barkley MP, Paulot F, Mao J. Isoprene emissions in Africa inferred from OMI observations of formaldehyde columns. Atmos Chem Phys 2012; 12:6219-6235. [PMID: 33688332 PMCID: PMC7939075 DOI: 10.5194/acp-12-6219-2012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We use 2005-2009 satellite observations of formaldehyde (HCHO) columns from the OMI instrument to infer biogenic isoprene emissions at monthly 1 × 1° resolution over the African continent. Our work includes new approaches to remove biomass burning influences using OMI absorbing aerosol optical depth data (to account for transport of fire plumes) and anthropogenic influences using AATSR satellite data for persistent small-flame fires (gas flaring). The resulting biogenic HCHO columns (ΩHCHO) from OMI follow closely the distribution of vegetation patterns in Africa. We infer isoprene emission (E ISOP) from the local sensitivity S = ΔΩHCHO / ΔE ISOP derived with the GEOS-Chem chemical transport model using two alternate isoprene oxidation mechanisms, and verify the validity of this approach using AMMA aircraft observations over West Africa and a longitudinal transect across central Africa. Displacement error (smearing) is diagnosed by anomalously high values of S and the corresponding data are removed. We find significant sensitivity of S to NOx under low-NOx conditions that we fit to a linear function of tropospheric column NO2. We estimate a 40% error in our inferred isoprene emissions under high-NOx conditions and 40-90% under low-NOx conditions. Our results suggest that isoprene emission from the central African rainforest is much lower than estimated by the state-of-the-science MEGAN inventory.
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Affiliation(s)
- E. A. Marais
- Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
| | - D. J. Jacob
- Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - T. P. Kurosu
- Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
| | - K. Chance
- Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
| | - J. G. Murphy
- Department of Chemistry, University of Toronto, Toronto, Canada
| | - C. Reeves
- School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - G. Mills
- School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - S. Casadio
- Instrument Data quality Evaluation and Analysis (IDEAS), Serco Spa Via Sciadonna 24, 00044 Frascati (Roma), Italy
| | - D. B. Millet
- Department of Soil, Water and Climate, University of Minnesota, St. Paul, MN, USA
| | - M. P. Barkley
- Space Research Centre, University of Leicester, Leicester, UK
| | - F. Paulot
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - J. Mao
- Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, USA
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Pyle JA, Warwick NJ, Harris NRP, Abas MR, Archibald AT, Ashfold MJ, Ashworth K, Barkley MP, Carver GD, Chance K, Dorsey JR, Fowler D, Gonzi S, Gostlow B, Hewitt CN, Kurosu TP, Lee JD, Langford SB, Mills G, Moller S, MacKenzie AR, Manning AJ, Misztal P, Nadzir MSM, Nemitz E, Newton HM, O'Brien LM, Ong S, Oram D, Palmer PI, Peng LK, Phang SM, Pike R, Pugh TAM, Rahman NA, Robinson AD, Sentian J, Samah AA, Skiba U, Ung HE, Yong SE, Young PJ. The impact of local surface changes in Borneo on atmospheric composition at wider spatial scales: coastal processes, land-use change and air quality. Philos Trans R Soc Lond B Biol Sci 2012; 366:3210-24. [PMID: 22006963 DOI: 10.1098/rstb.2011.0060] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We present results from the OP3 campaign in Sabah during 2008 that allow us to study the impact of local emission changes over Borneo on atmospheric composition at the regional and wider scale. OP3 constituent data provide an important constraint on model performance. Treatment of boundary layer processes is highlighted as an important area of model uncertainty. Model studies of land-use change confirm earlier work, indicating that further changes to intensive oil palm agriculture in South East Asia, and the tropics in general, could have important impacts on air quality, with the biggest factor being the concomitant changes in NO(x) emissions. With the model scenarios used here, local increases in ozone of around 50 per cent could occur. We also report measurements of short-lived brominated compounds around Sabah suggesting that oceanic (and, especially, coastal) emission sources dominate locally. The concentration of bromine in short-lived halocarbons measured at the surface during OP3 amounted to about 7 ppt, setting an upper limit on the amount of these species that can reach the lower stratosphere.
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Affiliation(s)
- J A Pyle
- National Centre for Atmospheric Science, NCAS, UK.
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Nowlan CR, Liu X, Chance K, Cai Z, Kurosu TP, Lee C, Martin RV. Retrievals of sulfur dioxide from the Global Ozone Monitoring Experiment 2 (GOME-2) using an optimal estimation approach: Algorithm and initial validation. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011jd015808] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sioris CE, Kovalenko LJ, McLinden CA, Salawitch RJ, Van Roozendael M, Goutail F, Dorf M, Pfeilsticker K, Chance K, von Savigny C, Liu X, Kurosu TP, Pommereau JP, Bösch H, Frerick J. Latitudinal and vertical distribution of bromine monoxide in the lower stratosphere from Scanning Imaging Absorption Spectrometer for Atmospheric Chartography limb scattering measurements. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006479] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Liu X, Chance K, Sioris CE, Spurr RJD, Kurosu TP, Martin RV, Newchurch MJ. Ozone profile and tropospheric ozone retrievals from the Global Ozone Monitoring Experiment: Algorithm description and validation. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2005jd006240] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jaeglé L, Martin RV, Chance K, Steinberger L, Kurosu TP, Jacob DJ, Modi AI, Yoboué V, Sigha-Nkamdjou L, Galy-Lacaux C. Satellite mapping of rain-induced nitric oxide emissions from soils. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2004jd004787] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- L. Jaeglé
- Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
| | - R. V. Martin
- Department of Physics and Atmospheric Science; Dalhousie University; Halifax, Nova Scotia Canada
| | - K. Chance
- Harvard-Smithsonian Center for Astrophysics; Cambridge Massachusetts USA
| | - L. Steinberger
- Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
| | - T. P. Kurosu
- Harvard-Smithsonian Center for Astrophysics; Cambridge Massachusetts USA
| | - D. J. Jacob
- Division of Engineering and Applied Sciences and Department of Earth and Planetary Sciences; Harvard University; Cambridge Massachusetts USA
| | - A. I. Modi
- Département de Physique, Ecole Normale Supérieure; University Abdou Moumouny of Niamey; Niamey Niger
| | - V. Yoboué
- Laboratoire de Physique de l'Atmosphère; Université de Cocody; Abidjan, Ivory Coast Africa
| | | | - C. Galy-Lacaux
- Observatoire Midi-Pyrénées; Laboratoire d'Aérologie; Toulouse France
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