Halogen activation via interactions with environmental ice and snow in the polar lower troposphere and other regions

The role of ice in the formation of chemically active halogens in the environment requires a full understanding because of its role in atmospheric chemistry, including controlling the regional atmospheric oxidizing capacity in specific situations. In particular, ice and snow are important for facilitating multiphase oxidative chemistry and as media upon which marine algae live. This paper reviews the nature of environmental ice substrates that participate in halogen chemistry, describes the reactions that occur on such substrates, presents the field evidence for ice-mediated halogen activation, summarizes our best understanding of ice-halogen activation mechanisms, and describes the current state of modeling these processes at different scales. Given the rapid pace of developments in the field, this paper largely addresses advances made in the past five years, with emphasis given to the polar boundary layer. The integrative nature of this field is highlighted in the presentation of work from the molecular to the regional scale, with a focus on understanding fundamental processes. This is essential for developing realistic parameterizations and descriptions of these processes for inclusion in larger scale models that are used to determine their regional and global impacts.

NATURVETENSKAP Geovetenskap och miljövetenskap Meteorologi och atmosfärforskning hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Meteorology and Atmospheric Sciences hsv//eng
ozone depletion events
sea-salt aerosol
arctic boundary-layer
in-situ
measurements
heterogeneous chlorine activation
molecular-dynamics
simulations
hydrochloric-acid ionization
atmospheric methyl-iodide
sunrise experiment 1992
dry nacl/nabr surfaces

Thomas, J. L. (author)
Abrahamsson, Katarina,1957Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology(Swepub:gu)xabrak (author)
Boxe, C. (author)
Granfors, Anna,1978Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology (author)
Jones, A. E. (author)
King, M. D. (author)
Saiz-Lopez, A. (author)
Shepson, P. B. (author)
Sodeau, J. (author)
Toohey, D. W. (author)
Toubin, C. (author)
von Glasow, R. (author)
Wren, S. N. (author)
Yang, X. (author)
Göteborgs universitetInstitutionen för kemi och molekylärbiologi (creator_code:org_t)

In:Atmospheric Chemistry and Physics: Copernicus GmbH12:14, s. 6237-62711680-73161680-7324

By the author/editor: Abbatt, J. P. D.; Thomas, J. L.; Abrahamsson, Kat ...; Boxe, C.; Granfors, Anna, ...; Jones, A. E.; show more...; King, M. D.; Saiz-Lopez, A.; Shepson, P. B.; Sodeau, J.; Toohey, D. W.; Toubin, C.; von Glasow, R.; Wren, S. N.; Yang, X.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Meteorology and ...

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