TY  - JOUR
AU  - Simpson, W. R.
AU  - Alvarez-Aviles, L.
AU  - Douglas, T. A.
AU  - Sturm, M.
AU  - Domine, F.
PY  - 2005//
TI  - Halogens in the coastal snow pack near Barrow, Alaska: Evidence for active bromine air-snow chemistry during springtime
JO  - Geophysical research letters
VL  - 32
PB  - American Geophysical Union
KW  - 0312 Atmospheric Composition and Structure: Air/sea constituent fluxes
KW  - 0330 Atmospheric Composition and Structure: Geochemical cycles
KW  - 0365 Atmospheric Composition and Structure: Troposphere: composition and chemistry
KW  - 0368 Atmospheric Composition and Structure: Troposphere: constituent transport and chemistry
KW  - 1863 Hydrology: Snow and ice
N2  - We measured halide concentrations of snow and frost flowers in the vicinity of Barrow, Alaska. We find that the ratio of bromide to sodium in frost flowers is slightly enhanced (?10%) as compared to sea water. In contrast, the ratio of bromide to sodium in some snow samples is more than an order of magnitude enhanced, and in other samples is more than an order of magnitude depleted. We interpret the bromide depleted snow as having been processed by heterogeneous chemistry and providing reactive halogen compounds to the atmosphere. The eventual end product of reactive bromine chemistry is HBr that is then deposited over a wide region, enhancing bromide in inland snow samples. Although frost flowers or open leads are likely to be the original source of halides that become reactive halogen gases, we find that the bromide release often occurs subsequent to production of aerosol from marine sources.
SN  - 0094-8276
UR  - http://dx.doi.org/10.1029/2004GL021748
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=5598), last updated on Mon, 27 Apr 2009 15:46:38 +0200
ID  - Simpson_etal2005
ER  -