Atmospheric CO2 Concentration from
60 to 20 Kyr BP from the Taylor Dome Ice Core, Antarctica|
A. Indermühle*, E. Monnin*, B. Stauffer*, T. F. Stocker*, and M. Wahlen˛
* Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
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Published and © 2000 by the American Geophysical Union.
Geophysical Research Letters, Vol. 27, No. 5, pp. 735-738, 1 March 2000
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A high-resolution record of the atmospheric CO2 concentration from 60 to 20 thousand years before present (kyrBP) based on measurements on the ice core of Taylor Dome, Antarctica is presented. This record shows four distinct peaks of 20 parts per million by volume(ppmv) on a millennial time scale. Good correlation of the CO2 record with temperature reconstructions based on stable isotope measurements on the Vostok ice core (Antarctica) is found.
CO2 mean values from Taylor Dome (open red diamonds; error bars: 1-sigma of the mean), Vostok (large green dots, Barnola et al., 1991) and Byrd Station (small blue squares, [Neftel et al., 1988]; blue area: 2-sigma spline) versus the Vostok GT4 age scale [Petit et al., 1999] and Taylor Dome depth (only valid for the Taylor Dome record).
Top: Air temperature record at Vostok (temperature change relative to modern temperature based on measurements of the isotopic composition of the ice, Petit et al., 1999), running mean (3 points). A1 and A2 are Antarctic warm events according to Blunier et al. . Bottom: CO2 data from Taylor Dome.
NOAA Paleoclimatology Program / WDC-A for Paleoclimatology
23 February 2000