Paper: ‘Summer temperatures were about 10°C warmer than today, even though the concentration of atmospheric CO2 was similar’

From AAAS: From Russia with Lovely Data Climate and the atmospheric concentration of CO2 are closely linked. Brigham-Grette et al. (p. 1421, published online 9 May) present data from Lake El’gygytgyn, in northeast Arctic Russia, that shows how climate varied between 3.6 and 2.2 million years ago, an important interval in the global cooling trend…

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Tisdale on Polar Amplification

Polar Amplification: Observations versus IPCC Climate Models Guest post by Bob Tisdale We’ve illustrated and discussed polar amplification in a few posts in the past. See here and here. Wikipedia has a short blurb about it: Polar amplification is the greater temperature increases in the Arctic compared to the earth as a whole as a result…