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Atmospheric CO2 over the last 1000 years: A record from the WAIS Divide ice core
Entry ID: brook_0739766

Abstract: These data are a decadally resolved record of atmospheric CO2 concentration for the last 1000 years, obtained from the West Antarctic Ice Sheet (WAIS) Divide shallow ice core.

Purpose: The most prominent feature of the pre-industrial period is a rapid ~7 ppm decrease of CO2 in a span of ~20-50 years at ~ 1600 A.D. This observation confirms the timing of an abrupt atmospheric CO2 decrease of ~10 ppm observed for that time period in the Law Dome ice core CO2 records, but the true magnitude of the decrease remains unclear. Atmospheric CO2 variations over the time period 1000-1800 ... View entire text
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Description: The U.S research community is conducting a deep ice coring project in West Antarctica for studies of climate, ice sheet history and cryobiology. This project is collecting a deep ice core from the West Antarctic Ice Sheet (WAIS) ice flow divide and integrating approximately 20 separate but synergistic projects to analyze the ice and interpret the records

Description: GLOBAL BIOGEOCHEMICAL CYCLES, VOL. 26, GB2027, 11 PP., 2012 doi:10.1029/2011GB004247
Geographic Coverage
Spatial coordinates   
  N: -79.47   S: -79.47   E: -112.08   W: -112.08

Temporal Coverage
Start Date: 2007-03-01
Stop Date: 2010-02-25
Data Set Progress
Data Center
National Snow and Ice Data Center Supplemental Info
Data Center URL:

Data Center Personnel
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
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Phone: 541-737-8197
Email: brooke at
Contact Address:
Department of Geosciences
130 Wilkinson Hall
City: Corvallis
Province or State: OR
Postal Code: 97331-5506
Country: USA
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Ahn, J. and E. J. Brook (2007), Atmospheric CO2 and climate from 65 to 30 ka B.P. Geophys. Res. Lett., 34, doi:10.1029/2007GL029551.

Ahn, J. and E.J. Brook (2008), Atmospheric CO2 and climate change on millennial time scales during the last glacial period. Science, 322, 83-85.

Ahn, J. and E.J. Brook (2009), A precise method for measurement of paleoatmospheric CO2 in small polar ice samples, J. ... View entire text
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Creation and Review Dates
DIF Creation Date: 2012-05-30
Last DIF Revision Date: 2018-02-05