Skip to main content
Article
A Record of Atmospheric Co2 During the Last 40,000 Years from the Siple Dome, Antarctica Ice Core
Journal of Geophysical Research-Atmospheres
  • Jinho Ahn
  • Martin Wahlen
  • Bruce L. Deck
  • Ed J. Brook
  • Paul Andrew Mayewski, University of Maine - Main
  • Kendrick C. Taylor
  • James W.C. White
Document Type
Article
Publication Date
7-15-2004
Publication Number
D13305
Disciplines
Abstract/ Summary

We have measured the CO2 concentration of air occluded during the last 40,000 years in the deep Siple Dome A ( hereafter Siple Dome) ice core, Antarctica. The general trend of CO2 concentration from Siple Dome ice follows the temperature inferred from the isotopic composition of the ice and is mostly in agreement with other Antarctic ice core CO2 records. CO2 rose initially at similar to 17.5 kyr B. P. ( thousand years before 1950), decreased slowly during the Antarctic Cold Reversal, rose during the Younger Dryas, fell to a local minimum at around 8 kyr B. P., and rose continuously since then. The CO2 concentration never reached steady state during the Holocene, as also found in the Taylor Dome and EPICA Dome C ( hereafter Dome C) records. During the last glacial termination, a lag of CO2 versus Siple Dome isotopic temperature is probable. The Siple Dome CO2 concentrations during the last glacial termination and in the Holocene are at certain times greater than in other Antarctic ice cores by up to 20 ppm (mumol CO2/mol air). While in situ production of CO2 is one possible cause of the sporadic elevated levels, the mechanism leading to the enrichment is not yet clear.

Citation/Publisher Attribution
Ahn, J, Wahlen, M, Deck, BL, Brook, EJ, Mayewski, PA, Taylor, KC, and White, JWC, 2004, A Record of Atmospheric Co2 During the Last 40,000 Years from the Siple Dome, Antarctica Ice Core: Journal of Geophysical Research-Atmospheres, v. 109, D13305. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
Publisher Statement
© Copyright 2004 American Geophysical Union
DOI
10.1029/2003JD004415
Version
publisher's version of the published document
Citation Information
Jinho Ahn, Martin Wahlen, Bruce L. Deck, Ed J. Brook, et al.. "A Record of Atmospheric Co2 During the Last 40,000 Years from the Siple Dome, Antarctica Ice Core" Journal of Geophysical Research-Atmospheres Vol. 109 (2004)
Available at: http://works.bepress.com/paul_mayewski/34/