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Originally Posted by pghnative
Is the Vostok data contested? Or is it generally agreed to by climatologists? I'm somewhat stunned by it.
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I believe it is generally agreed upon. The fit with the more recent and longer (in time)
EPICA record (some 500 km away from Vostok) is remarkable. Of course, this may be Antarctica specific (the sudden changes and so on), not global, but it does give a good indication of the last few Ice Ages and interglacials.
This site gives a good overview of what data is already used from this ice core to get a climate (temperature) report. Quite a bit more than only CO2, apparently...