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Author Spahni R., Schwander J., Flückiger J., Stauffer B., Chappellaz J. & Raynaud D. doi  openurl
  Title The attenuation of fast atmospheric CH4 variations recorded in polar ice cores. Type Journal Article
  Year (down) 2003 Publication Geophysical research letters Abbreviated Journal  
  Volume 30 Issue 11 Pages 25-1  
  Keywords  
  Abstract To reconstruct fast atmospheric trace gas variations from polar ice cores it has to be considered that their amplitudes are attenuated during the enclosure process in the ice. Relevant processes for the attenuation are the molecular diffusion in the open pores of the firn column and the gradual bubble close off in the depth of the transition from firn to ice. These processes depend mainly on temperature and accumulation rate and lead e.g. to a strong attenuation for cold sites with low accumulation rates. With a diffusion and enclosure model it is possible to calculate the attenuation for a single event and to compare ice core records from different sites. We investigate the atmospheric methane (CH4) variation during the cold event 8200 years ago and calculate that its amplitude as recorded in the EPICA Dome C ice core is attenuated to a magnitude between 34% and 59%.  
  Programme 960  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0094-8276 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 2231  
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