Articles | Volume 24, issue 6
https://doi.org/10.5194/acp-24-3421-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-3421-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
| 
20 Mar 2024
Research article | Highlight paper |
| 20 Mar 2024
| 20 Mar 2024
Observations of cyanogen bromide (BrCN) in the global troposphere and their relation to polar surface O3 destruction
James M. Roberts
CORRESPONDING AUTHOR
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Siyuan Wang
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Cooperative Institute for Research in Environmental Sciences, CIRES, University of Colorado, and NOAA, Boulder, CO, USA
Patrick R. Veres
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
now at: Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
J. Andrew Neuman
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Cooperative Institute for Research in Environmental Sciences, CIRES, University of Colorado, and NOAA, Boulder, CO, USA
Michael A. Robinson
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Cooperative Institute for Research in Environmental Sciences, CIRES, University of Colorado, and NOAA, Boulder, CO, USA
Ilann Bourgeois
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Cooperative Institute for Research in Environmental Sciences, CIRES, University of Colorado, and NOAA, Boulder, CO, USA
now at: Université Savoie Mont Blanc, INRAE, CARRTEL, 74200 Thonon-Les Bains, France
Jeff Peischl
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Cooperative Institute for Research in Environmental Sciences, CIRES, University of Colorado, and NOAA, Boulder, CO, USA
Thomas B. Ryerson
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Chelsea R. Thompson
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Hannah M. Allen
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
John D. Crounse
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
Paul 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
Samuel R. Hall
Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
Kirk Ullmann
Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
Simone Meinardi
Department of Chemistry, University of California Irvine, Irvine, CA, USA
Isobel J. Simpson
Department of Chemistry, University of California Irvine, Irvine, CA, USA
Donald Blake
Department of Chemistry, University of California Irvine, Irvine, CA, USA
Data sets
ATom: Merged Atmospheric Chemistry, Trace Gases, and Aerosols, Version 2 S. C. Wofsy et al. https://doi.org/10.3334/ORNLDAAC/1925
Executive editor
Bromine chemistry in polar regions is important for the composition of the atmosphere as well as climate. Reactive bromine strongly affects the oxidation capacity and the local ozone budget, and through the export to lower latitudes, it affects the ozone budget and the atmosphere's radiative properties outside polar regions.
The newly identified bromine reservoir changes our understanding of the chemical budgets of polar halogens which will have implications for the ozone and mercury removal cycles.
Bromine chemistry in polar regions is important for the composition of the atmosphere as well as...
Short summary
We measured cyanogen bromide (BrCN) in the troposphere for the first time. BrCN is a product of the same active bromine chemistry that destroys ozone and removes mercury in polar surface environments and is a previously unrecognized sink for active Br compounds. BrCN has an apparent lifetime against heterogeneous loss in the range 1–10 d, so it serves as a cumulative marker of Br-radical chemistry. Accounting for BrCN chemistry is an important part of understanding polar Br cycling.
We measured cyanogen bromide (BrCN) in the troposphere for the first time. BrCN is a product of...
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