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Katich JM, Apel EC, Bourgeois I, Brock CA, Bui TP, Campuzano-Jost P, Commane R, Daube B, Dollner M, Fromm M, Froyd KD, Hills AJ, Hornbrook RS, Jimenez JL, Kupc A, Lamb KD, McKain K, Moore F, Murphy DM, Nault BA, Peischl J, Perring AE, Peterson DA, Ray EA, Rosenlof KH, Ryerson T, Schill GP, Schroder JC, Weinzierl B, Thompson C, Williamson CJ, Wofsy SC, Yu P, Schwarz JP. Pyrocumulonimbus affect average stratospheric aerosol composition. Science 2023; 379:815-820. [PMID: 36821693 DOI: 10.1126/science.add3101] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Pyrocumulonimbus (pyroCb) are wildfire-generated convective clouds that can inject smoke directly into the stratosphere. PyroCb have been tracked for years, yet their apparent rarity and episodic nature lead to highly uncertain climate impacts. In situ measurements of pyroCb smoke reveal its distinctive and exceptionally stable aerosol properties and define the long-term influence of pyroCb activity on the stratospheric aerosol budget. Analysis of 13 years of airborne observations shows that pyroCb are responsible for 10 to 25% of the black carbon and organic aerosols in the "present-day" lower stratosphere, with similar impacts in both the North and South Hemispheres. These results suggest that, should pyroCb increase in frequency and/or magnitude in future climates, they could generate dominant trends in stratospheric aerosol.
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Affiliation(s)
- J M Katich
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - E C Apel
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - I Bourgeois
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - C A Brock
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA
| | - T P Bui
- NASA Ames Research Center, Moffett Field, CA, USA
| | - P Campuzano-Jost
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.,Department of Chemistry, University of Colorado, Boulder, CO, USA
| | - R Commane
- Department of Earth and Environmental Sciences and School of Engineering and Applied Sciences, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA
| | - B Daube
- Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
| | - M Dollner
- Aerosol Physics and Environmental Physics, Faculty of Physics, University of Vienna, Vienna, Austria
| | - M Fromm
- Naval Research Laboratory, Washington, DC, USA
| | - K D Froyd
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - A J Hills
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - R S Hornbrook
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - J L Jimenez
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.,Department of Chemistry, University of Colorado, Boulder, CO, USA
| | - A Kupc
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.,Aerosol Physics and Environmental Physics, Faculty of Physics, University of Vienna, Vienna, Austria
| | - K D Lamb
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - K McKain
- NOAA Global Monitoring Laboratory, Boulder, CO, USA
| | - F Moore
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.,NOAA Global Monitoring Laboratory, Boulder, CO, USA
| | - D M Murphy
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA
| | - B A Nault
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.,Department of Chemistry, University of Colorado, Boulder, CO, USA.,Center for Aerosol and Cloud Chemistry, Aerodyne Research Inc., Billerica, MA, USA
| | - J Peischl
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - A E Perring
- Department of Chemistry, Colgate University, Hamilton, NY, USA
| | | | - E A Ray
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - K H Rosenlof
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA
| | - T Ryerson
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA
| | - G P Schill
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - J C Schroder
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.,Department of Chemistry, University of Colorado, Boulder, CO, USA.,Colorado Department of Public Health and Environment, Denver, CO, USA
| | - B Weinzierl
- Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
| | - C Thompson
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - C J Williamson
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.,Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - S C Wofsy
- Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
| | - P Yu
- Institute of Environmental and Climate Research, Jinan University, Guangzhou, People's Republic of China
| | - J P Schwarz
- National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA
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Haskins JD, Lopez-Hilfiker FD, Lee BH, Shah V, Wolfe GM, DiGangi J, Fibiger D, McDuffie EE, Veres P, Schroder JC, Campuzano-Jost P, Day DA, Jimenez JL, Weinheimer A, Sparks T, Cohen RC, Campos T, Sullivan A, Guo H, Weber R, Dibb J, Greene J, Fiddler M, Bililign S, Jaeglé L, Brown SS, Thornton JA. Anthropogenic control over wintertime oxidation of atmospheric pollutants. Geophys Res Lett 2019; 46:14826-14835. [PMID: 33012881 PMCID: PMC7526063 DOI: 10.1029/2019gl085498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 12/11/2019] [Indexed: 05/31/2023]
Abstract
During winter in the mid-latitudes, photochemical oxidation is significantly slower than in summer and the main radical oxidants driving formation of secondary pollutants, such as fine particulate matter and ozone, remain uncertain, owing to a lack of observations in this season. Using airborne observations, we quantify the contribution of various oxidants on a regional basis during winter, enabling improved chemical descriptions of wintertime air pollution transformations. We show that 25-60% of NOx is converted to N2O5 via multiphase reactions between gas-phase nitrogen oxide reservoirs and aerosol particles, with ~93% reacting in the marine boundary layer to form >2.5 ppbv ClNO2. This results in >70% of the oxidizing capacity of polluted air during winter being controlled, not by typical photochemical reactions, but from these multiphase reactions and emissions of volatile organic compounds, such as HCHO, highlighting the control local anthropogenic emissions have on the oxidizing capacity of the polluted wintertime atmosphere.
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Affiliation(s)
- J. D. Haskins
- Department of Atmospheric Sciences, University of Washington, Seattle, WA USA
| | | | - B. H. Lee
- Department of Atmospheric Sciences, University of Washington, Seattle, WA USA
| | - V. Shah
- Department of Atmospheric Sciences, University of Washington, Seattle, WA USA
| | - G. M. Wolfe
- Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD USA
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD USA
| | - J. DiGangi
- NASA Langley Research Center, Hampton, VA USA
| | - D. Fibiger
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO USA
| | - E. E. McDuffie
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- Department of Chemistry, University of Colorado, Boulder, CO USA
- Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO USA
| | - P. Veres
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - J. C. Schroder
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- Department of Chemistry, University of Colorado, Boulder, CO USA
| | - P. Campuzano-Jost
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- Department of Chemistry, University of Colorado, Boulder, CO USA
| | - D. A. Day
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- Department of Chemistry, University of Colorado, Boulder, CO USA
| | - J. L. Jimenez
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
- Department of Chemistry, University of Colorado, Boulder, CO USA
| | - A. Weinheimer
- Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, CO USA
| | - T. Sparks
- Department of Chemistry, University of California, Berkeley CA USA
| | - R. C. Cohen
- Department of Chemistry, University of California, Berkeley CA USA
| | - T. Campos
- Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, CO USA
| | - A. Sullivan
- Department of Atmospheric Sciences, Colorado State University, Fort Collins, CO USA
| | - H. Guo
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA USA
| | - R. Weber
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA USA
| | - J. Dibb
- Department of Earth Sciences, University of New Hampshire, Durham, NH USA
| | - J. Greene
- Department of Physics, North Carolina A&T State University, Greensboro, NC USA
| | - M. Fiddler
- Department of Physics, North Carolina A&T State University, Greensboro, NC USA
| | - S. Bililign
- Department of Physics, North Carolina A&T State University, Greensboro, NC USA
| | - L. Jaeglé
- Department of Atmospheric Sciences, University of Washington, Seattle, WA USA
| | - S. S. Brown
- Department of Chemistry, University of Colorado, Boulder, CO USA
- Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO USA
| | - J. A. Thornton
- Department of Atmospheric Sciences, University of Washington, Seattle, WA USA
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