Ice Core Records of Atmospheric CO2
Around the Last Three Glacial Terminations |
Hubertus Fischer, Martin Wahlen, Jesse Smith, Derek Mastroianni, and Bruce Deck Scripps Institution of Oceanography.
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Published: © by the American Association for the Advancement of Science
Science, 283, 1712-1714
Air trapped in bubbles in polar ice cores constitutes an archive for the reconstruction of the global carbon cycle and the relation between greenhouse gases and climate in the past. High-resolution records from Antarctic ice cores show that carbon dioxide concentrations increased by 80 to 100 parts per million by volume 600 +/- 400 years after the warming of the last three deglaciations. Despite strongly decreasing temperatures, high carbon dioxide concentrations can be sustained for thousands of years during glaciations; the size of this phase lag is probably connected to the duration of the preceding warm period, which controls the change in land ice coverage and the buildup of the terrestrial biosphere.
NOAA Paleoclimatology Program / WDC for Paleoclimatology
8 February 2000