1. Главная
  2. Ресурсы
  3. Библиотечный поиск
Diurnal production ofgaseous mercury inthe alpine snowpackbefore snowmelt Xavier FaïnSylvain GrangeonEnno Bahlmann2007 год

Diurnal production of gaseous mercury in the alpine snowpack before snowmelt
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: In March 2005, an extensive mercury study was performed just before snowmelt at Col de Porte, an alpine site close to Grenoble, France. Total mercury concentration in the snowpack ranged from 80 ± 08 to 160 ± 15 ng l −1 , while reactive mercury was below detection limit (0.2 ng l −1 ). We observed simultaneously a production of gaseous elemental mercury (GEM) in the top layer of the snowpack and an emission flux from the snow surface to the atmosphere. Both phenomena were well correlated with solar irradiation, indicating photo‐induced reactions in the snow interstitial air (SIA). The mean daily flux of GEM from the snowpack was estimated at ∼9 ng m −2 d −1 . No depletion of GEM concentrations was observed in the SIA, suggesting no occurrence of oxidation processes. The presence of liquid water in the snowpack clearly enhanced GEM production in the SIA. Laboratory flux chamber measurements enabled us to confirm that GEM production from this alpine snowpack was first driven by solar radiation (especially UVA and UVB radiation), and then by liquid water in the snowpack. Finally, a large GEM emission from the snow surface occurred during snowmelt, and we report total mercury concentrations in meltwater of about 72 ng l −1 .
Год издания: 2007
Авторы: Xavier Faïn, Sylvain Grangeon, Enno Bahlmann, Johannes Fritsche, Daniel Obrist, Aurélien Dommergue, Christophe Ferrari, Warren R. L. Cairns, Ralf Ebinghaus, Carlo Barbante, Paolo Cescon, Claude F. Boutron
Издательство: American Geophysical Union
Источник: Journal of Geophysical Research Atmospheres
Ключевые слова: Mercury impact and mitigation studies, Toxic Organic Pollutants Impact, Air Quality and Health Impacts
Другие ссылки: Journal of Geophysical Research Atmospheres (PDF)
Journal of Geophysical Research Atmospheres (HTML)
Helmholtz-Zentrum Geesthacht Zentrum für Materialforschung und kustenforschung (The Helmholtz Center Geesthacht) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (PDF)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)