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Profiles of Mercury in the snow pack at Station Nord, Greenland shortly after polar sunrise
Author(s) -
Ferrari Christophe P.,
Dommergue Aurélien,
Boutron Claude F.,
Jitaru Petru,
Adams Freddy C.
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl018961
Subject(s) - snow , sunrise , mercury (programming language) , environmental science , atmospheric sciences , mercure , polar , meteorology , environmental chemistry , geology , chemistry , geography , analytical chemistry (journal) , physics , astronomy , computer science , programming language
Mercury (Hg) species have been measured in the snow pack at Station Nord, Greenland both in the snow and in the air of snow from February 25 to March 15, 2002, during twilight and low solar irradiation periods. More than 99% of Hg is in the snow itself (∼94–97% as Hg 2+ and ∼5% as MeHg + ) while less than 1% is in the interstitial air of snow as Hg°. Gaseous Elemental Mercury (Hg°) concentrations, decreased exponentially with depth from ∼1.5 ng/m 3 outside to ∼0.1 ng/m 3 at 120 cm depth in the snow air. Hg° incorporation flux to the snow pack has been evaluated to ∼5.8–7.0 pg/m 2 /h which is weak, indicating that this process does not change significantly the Hg content in the snow. We believe that this decrease in the air of snow is the result of fast oxidation processes of Hg° rather than adsorption of Hg° onto snow surfaces.