Articles | Volume 25, issue 1
https://doi.org/10.5194/acp-25-45-2025
© Author(s) 2025. 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-25-45-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Jan 2025
Research article |
| 06 Jan 2025
| 06 Jan 2025
Widespread trace bromine and iodine in remote tropospheric non-sea-salt aerosols
Gregory P. Schill
CORRESPONDING AUTHOR
National Oceanic and Atmospheric Administration, Chemical Sciences Laboratory, Boulder, CO 80305, USA
Karl D. Froyd
Air Innova Research and Consulting, Boulder, CO 80305, USA
Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80305, USA
Daniel M. Murphy
National Oceanic and Atmospheric Administration, Chemical Sciences Laboratory, Boulder, CO 80305, USA
Christina J. Williamson
Institute for Atmospheric and Earth System Research, Climate Research Programme, Finnish Meteorological Institute, 00101 Helsinki, Finland
Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Charles A. Brock
National Oceanic and Atmospheric Administration, Chemical Sciences Laboratory, Boulder, CO 80305, USA
Tomás Sherwen
Hephaestus Partners, Ealing, London, W7, UK
Mat J. Evans
National Centre for Atmospheric Science, University of York, York, YO10 5DD, UK
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, YO10 5DD, UK
Eric A. Ray
National Oceanic and Atmospheric Administration, Chemical Sciences Laboratory, Boulder, CO 80305, USA
Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80305, USA
Eric C. Apel
Atmospheric Chemistry Observations & Modeling, NSF National Center for Atmospheric Research, Boulder, CO 80305, USA
Rebecca S. Hornbrook
Atmospheric Chemistry Observations & Modeling, NSF National Center for Atmospheric Research, Boulder, CO 80305, USA
Alan J. Hills
Atmospheric Chemistry Observations & Modeling, NSF National Center for Atmospheric Research, Boulder, CO 80305, USA
Jeff Peischl
National Oceanic and Atmospheric Administration, Chemical Sciences Laboratory, Boulder, CO 80305, USA
Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80305, USA
Thomas B. Ryerson
National Oceanic and Atmospheric Administration, Chemical Sciences Laboratory, Boulder, CO 80305, USA
Chelsea R. Thompson
National Oceanic and Atmospheric Administration, Chemical Sciences Laboratory, Boulder, CO 80305, USA
Ilann Bourgeois
Université Savoie Mont Blanc, INRAE, CARRTEL, 74200 Thonon-les-Bains, France
Donald R. Blake
Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
Joshua P. DiGangi
NASA Langley Research Center, Hampton, VA 23681, USA
Glenn S. Diskin
NASA Langley Research Center, Hampton, VA 23681, USA
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Short summary
Using single-particle mass spectrometry, we show that trace concentrations of bromine and iodine are ubiquitous in remote tropospheric aerosol and suggest that aerosols are an important part of the global reactive iodine budget. Comparisons to a global climate model with detailed iodine chemistry are favorable in the background atmosphere; however, the model cannot replicate our measurements near the ocean surface, in biomass burning plumes, and in the stratosphere.
Using single-particle mass spectrometry, we show that trace concentrations of bromine and iodine...
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