Atmospheric Chemistry and Physics The origin of sea salt in snow on Arctic sea ice and in coastal regions
Abstract. Snow, through its trace constituents, can have a major impact on lower tropospheric chemistry, as evidenced by ozone depletion events (ODEs) in oceanic polar areas. These ODEs are caused by the chemistry of bromine com-pounds that originate from sea salt bromide. Bromide may be supplied to...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2004
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.592.7627 http://hal.archives-ouvertes.fr/docs/00/32/83/74/PDF/acp-4-2259-2004.pdf |
| Summary: | Abstract. Snow, through its trace constituents, can have a major impact on lower tropospheric chemistry, as evidenced by ozone depletion events (ODEs) in oceanic polar areas. These ODEs are caused by the chemistry of bromine com-pounds that originate from sea salt bromide. Bromide may be supplied to the snow surface by upward migration from sea ice, by frost flowers being wind-blown to the snow surface, or by wind-transported aerosol generated by sea spray. We investigate here the relative importance of these processes by analyzing ions in snow near Alert and Ny-AĚŠlesund (Cana-dian and European high Arctic) in winter and spring. Verti-cal ionic profiles in the snowpack on sea ice are measured to test upward migration of sea salt ions and to seek evidence for ion fractionation processes. Time series of the ionic com-position of surface snow layers are investigated to quantify |
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