Atmospheric Chemistry and Physics
Abstract. Measurements of gas phase soluble bromide in the boundary layer and in firn air, and Br − in aerosol and snow, were made at Summit, Greenland (72.5 ◦ N, 38.4 ◦ W, 3200 m a.s.l.) as part of a larger investigation into the in-fluence of Br chemistry on HOx cycling. The soluble bro-mide measu...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.612.1332 http://www.atmos-chem-phys.net/10/9931/2010/acp-10-9931-2010.pdf |
| Summary: | Abstract. Measurements of gas phase soluble bromide in the boundary layer and in firn air, and Br − in aerosol and snow, were made at Summit, Greenland (72.5 ◦ N, 38.4 ◦ W, 3200 m a.s.l.) as part of a larger investigation into the in-fluence of Br chemistry on HOx cycling. The soluble bro-mide measurements confirm that photochemical activation of Br − in the snow causes release of active Br to the over-lying air despite trace concentrations of Br − in the snow (means 15 and 8 nmol Br − kg−1 of snow in 2007 and 2008, respectively). Mixing ratios of soluble bromide above the snow were also found to be very small (mean < 1 ppt both years, with maxima of 3 and 4 ppt in 2007 and 2008, respec-tively), but these levels clearly oxidize and deposit long-lived gaseous elemental mercury and may perturb HOx partition-ing. Concentrations of Br − in surface snow tended to in- |
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