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Raman spectroscopy of gaseous inclusions in EDML ice core: first results – microbubbles

  • Christian Weikusat (a1), Johannes Freitag (a1) and Sepp Kipfstuhl (a1)
Abstract

Measurements of N2/O2 ratios inside individual air bubbles at various depths in the EDML (Antarctic) ice core are presented here. The small bubbles (diameter less than ~200 µm) in deeper ice are significantly enriched in O2 compared to the larger bubbles. The N2/O2 ratios show a systematic dependence on bubble size which is not the case for bubbles in shallower ice. This is interpreted as an effect of pressure relaxation during storage of the cores.

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References
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Journal of Glaciology
  • ISSN: 0022-1430
  • EISSN: 1727-5652
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