Atmospheric depletion of mercury over Antarctica during glacial periods. (Articolo in rivista)

Type
Label
  • Atmospheric depletion of mercury over Antarctica during glacial periods. (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Jitaru P.; Gabrielli P.; Marteel A.; C. Plane J. M.; Planchon F. A. M.; Gauchard P.-A.; Ferrari C.; Boutron C. F.; Adams F. C.; Hong S.; Cescon P.; Barbante C. (2009)
    Atmospheric depletion of mercury over Antarctica during glacial periods.
    in Nature (Lond.)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Jitaru P.; Gabrielli P.; Marteel A.; C. Plane J. M.; Planchon F. A. M.; Gauchard P.-A.; Ferrari C.; Boutron C. F.; Adams F. C.; Hong S.; Cescon P.; Barbante C. (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • Nature Geoscience, Published online: 14 June 2009 / doi:10.1038/ngeo549 (literal)
Note
  • Science direct - Elsevier (literal)
  • ISI Web of Science (WOS) (literal)
  • Scopus (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1Institute for the Dynamics of Environmental Processes (IDPA-CNR), Dorsoduro 2137, 30123 Venice, Italy, 2University of Antwerp, Department of Chemistry, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium, 3Laboratoire National de Métrologie et d'Essais (LNE), Department of Biomedical and Inorganic Chemistry, 1 rue Gaston Boissier, 75724 Paris CEDEX 15, France, 4Laboratoire de Glaciologie et Géophysique de l'Environnement UMR 5183 Université Joseph Fourier de Grenoble/CNRS 54, rue Molière, B.P. 96, 38402 St Martin d'Heres cedex, France, 5School of Earth Sciences and Byrd Polar Research Center, The Ohio State University, Columbus, Ohio 43210, USA, 6Department of Earth Sciences, University of Siena, via del Laterino 8, 53 100 Siena, Italy, 7School of Chemistry, University of Leeds, Leeds LS2 9JT, UK, 8Royal Museum for Central Africa, Geology Department Leuvensesteenweg, 13, 3080 Tervuren, Belgium, 9Polytech Grenoble (Institut Universitaire de France), Université Joseph Fourier, 28 avenue Benoît Frachon, B.P. 53, 38041 Grenoble, France, 10Unité de Formation et de Recherche de Physique (Institut Universitaire de France), Université Joseph Fourier, Domaine Universitaire, B.P. 68 38041 Grenoble, France, 11Korea Polar Research Institute, 7-50, Songdo-dong, Yeonsu-gu, Incheon 406-840, Korea, 12University of Venice Ca' Foscari, Department of Environmental Sciences, Dorsoduro 2137, 30123 Venice, Italy. (literal)
Titolo
  • Atmospheric depletion of mercury over Antarctica during glacial periods. (literal)
Abstract
  • Mercury is a globally dispersed toxic metal that affects even remote polar areas. During seasonal atmospheric mercury depletion events in polar areas, mercury is removed from the atmosphere1,2 and subsequently deposited in the surface snows3. However, it is unknown whether these events, which have been documented for the past two decades, have occurred in the past. Here we show that over the past 670,000 years, atmospheric mercury deposition in surface snows was greater during the coldest climatic stages, coincident with the highest atmospheric dust loads. We suggest that this increased scavenging is caused by the low temperatures, which allowed the oxidation of gaseous mercury by sea-salt-derived halogens. The oxidized mercury compounds are then transferred onto the abundant mineral dust grains and deposited on the snowpack, leading to the depletion of gaseous mercury in the Antarctic atmosphere. We conclude that polar regions acted as a mercury sink during the coldest climatic stages, and that atmospheric deposition of Hg is therefore not an exclusively recent phenomenon. (literal)
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