Climate Change: New Antarctic Ice Core Data
In June of 1999 the latest ice core data from the Vostok site in Antarctica were published by Petit et al in the British journal Nature. These new data extended the historical record of temperature variations and atmospheric concentrations of CO2, methane and other greenhouse trace gases (GTG) back to 420,000 years before present (BP). The ice cores were drilled to over 3,600 meters. This is just over 2.2 miles deep. These new data double the length of the historical record.
All of it at:
http://www.daviesand.com/Choices/Precautionary_Planning/New_Data/
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And
http://www.usgcrp.gov/usgcrp/seminars/990923FO.html
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