Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4444935 | Atmospheric Environment | 2005 | 13 Pages |
Abstract
In the snow pack which is seasonal and about 40 cm depth above permafrost, Hg is involved in both production and incorporation processes. The incorporation was evaluated to â¼5-40 pg m2 h. Outside of AMDE periods, Hg flux from the snow surface to the atmosphere was the consequence of GEM production in the air of snow and was about â¼15-50 ng mâ2 hâ1, with a contribution of deeper snow layers evaluated to â¼0.3-6.5 ng mâ2 hâ1. The major part of GEM production is then mainly a surface phenomenon. The internal production of GEM was largely increasing when snow temperatures were close to melting, indicating a chemical process occurring in the quasi-liquid layer at the surface of snow grains.
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Authors
Christophe P. Ferrari, Pierre-Alexis Gauchard, Katrine Aspmo, Aurélien Dommergue, Olivier Magand, Enno Bahlmann, Sonia Nagorski, Christian Temme, Ralf Ebinghaus, Alexandra Steffen, Cathy Banic, Torunn Berg, Frédéric Planchon, Carlo Barbante,