Discussion of the reliability of CO2, CH4 and N2O records from polar ice cores (scientific paper)

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概要

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• Air in polar ice has about the same composition as atmospheric air at the time of ice formation. This allows to determine the composition, especially the concentration of greenhouse gases, in the past. However, the air composition in the ice can be slightly altered by chemical and biological processes in the ice. The reliability of long term trends can be determined by comparing records from different ice cores. For short duration details and time lags such comparisons are not possible due to uncertainties of the age scales of records from different cores. In this case very detailed records along sections of ice cores show whether the scatter of the results is larger than the theoretical expected one. A larger scatter is assumed to be caused by reactions between impurities in the ice which show generally short term variations. A low scatter of detailed high resolution records is therefore, a prerequisite for reliable records.

• 国立極地研究所の論文

著者

• Aoki Shuji

  Centre For Atmospheric And Oceanic Studies Tohoku University

• Stauffer Bernhard

  Physics Institute, University of Bern

• Fluckiger Jacqueline

  Physics Institute, University of

• Monnin Eric

  Physics Institute, University of Bern

• Nakazawa Takakiyo

  Centre for Atmospheric and Oceanic Studies, Tohoku University

• Nakazawa Takakiyo

  Centre For Atmospheric And Oceanic Studies Tohoku University

• Monnin Eric

  Physics Institute University Of Bern

• Stauffer Bernhard

  Physics Institute University Of Bern

• Fluckiger Jacqueline

  Physics Institute University Of

関連論文

• Discussion of the reliability of CO2, CH4 and N2O records from polar ice cores (scientific paper)
• Atmospheric carbon dioxide and methane concentrations in the past and synchronisation of ice core records from both hemispheres based on methane results

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