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Author Dommergue A, Barret M, Courteaud J, Cristofanelli P, Ferrari C P, GallĂ©e H, doi  openurl
  Title Dynamic recycling of gaseous elemental mercury in the boundary layer of the Antarctic Plateau Type Journal Article
  Year (down) 2012 Publication Atmos. Chem. Phys. Abbreviated Journal  
  Volume 12 Issue 22 Pages 11027-11036  
  Keywords  
  Abstract Gaseous elemental mercury (Hg0) was investigated in the troposphere and in the interstitial air extracted from the snow at Dome Concordia station (alt. 3320 m) on the Antarctic Plateau during January 2009. Measurements and modeling studies showed evidence of a very dynamic and daily cycling of Hg0 inside the mixing layer with a range of values from 0.2 ng m−3 up to 2.3 ng m−3. During low solar irradiation periods, fast Hg0 oxidation processes in a confined layer were suspected. Unexpectedly high Hg0 concentrations for such a remote place were measured under higher solar irradiation due to snow photochemistry. We suggest that a daily cycling of reemission/oxidation occurs during summer within the mixing layer at Dome Concordia. Hg0 concentrations showed a negative correlation with ozone mixing ratios, which contrasts with atmospheric mercury depletion events observed during the Arctic spring. Unlike previous Antarctic studies, we think that atmospheric Hg0 removal may not be the result of advection processes. The daily and dramatic Hg0 losses could be a consequence of surface or snow induced oxidation pathways. It remains however unclear whether halogens are involved. The cycling of other oxidants should be investigated together with Hg species in order to clarify the complex reactivity on the Antarctic plateau.  
  Programme 1028  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Copernicus Publications Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1680-7324 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 4172  
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