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Atmospheric mercury depletion event stuy in Ny-Alesund (Svalbard) in spring 2005. Deposition and transformation of Hg in surface snow during springtime (Articolo in rivista)
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- Atmospheric mercury depletion event stuy in Ny-Alesund (Svalbard) in spring 2005. Deposition and transformation of Hg in surface snow during springtime (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
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Ferrari CP, Padova C., Fain X, Gauchard PA, Dommergue A., Aspmo K., Berg T., Cairns W., Barbante C., Cescon P., Kaleschke L., Richter A., Wittrock F., Boutron C. (2008)
Atmospheric mercury depletion event stuy in Ny-Alesund (Svalbard) in spring 2005. Deposition and transformation of Hg in surface snow during springtime
in Science of the total environment
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Ferrari CP, Padova C., Fain X, Gauchard PA, Dommergue A., Aspmo K., Berg T., Cairns W., Barbante C., Cescon P., Kaleschke L., Richter A., Wittrock F., Boutron C. (literal)
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- Laboratoire de Glaciologie et Géophysique de l' Environnement du C.N.R.S., 54 rue Molière, BP 96, 38402 Saint Martin d'Hères, France
Polytech' Grenoble, Université Joseph Fourier (Institut Universitaire de France), 28 Avenue Benoît Frachon, BP 53, 38041 Grenoble, France
Norwegian Institute for Air Research (NILU), Instituttveien 18, P.O. Box 100, N-2027, Kjeller, Norway
Department of Chemistry, University of Oslo, P.O. Box 1033, Oslo, Norway
Instituto per la Dinamica dei Processi Ambientali del CNR, Dorsoduro, 2137, 30123, Venice, Italy
Environmental Sciences Department, University of Venice, Calle Larga S. Marta, 2137, I-30123 Venice, Italy
Institute of Oceanography, University of Hamburg, Germany
Institute of Environmental Physics, University of Bremen, Germany
Unités de Formation et de Recherche de Mécanique et de Physique, Université Joseph Fourier, BP 68, 38041 Grenoble, France (literal)
- Titolo
- Atmospheric mercury depletion event stuy in Ny-Alesund (Svalbard) in spring 2005. Deposition and transformation of Hg in surface snow during springtime (literal)
- Abstract
- A field campaign was conducted in Ny-Alesund (78 degrees 54'N, 11 degrees 53'E), Svalbard (Norway) during April and May 2005. An Atmospheric Mercury (Hg) Depletion Event (AMDE) was observed from the morning of April 24 until the evening of April 27. Transport of already Hg and ozone (O-3) depleted air masses could explain this observed depletion. Due to a snowfall event during the AMDE, surface snow Hg concentrations increased two fold. Hg deposition took place over a short period of time corresponding to 3-4 days. More than 80% of the deposited Hg was estimated to be reemitted back to the atmosphere in the days following the event. During the campaign, we observed night and day variations in surface snow Hg concentrations, which may be the result of gaseous elemental mercury (GEM) oxidation to divalent Hg at the snow/air interface by daylight surface snow chemistry. Finally, a decrease in the reactive Hg (Hg-R) fraction of total Hg (Hg-T) in the surface snow was observed during spring. We postulate that the transformation of HgR to a more stable form may occur in Arctic snow during spring. (C) 2008 Elsevier B.V. All rights reserved (literal)
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