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Uploaded on Tuesday 21 Feb 2012 by GRID-Arendal

Arctic temperatures in the 20th century, modeled and observed

Year: 2007 Author: Hugo Ahlenius, UNEP/GRID-Arendal
Description:
Observed Arctic winter land temperatures and IPCC model recreations for the 20th century. Note that although these model runs are able to capture the range of Arctic warm and cold periods, the timing of the peaks varies, suggesting that the early 20th century warming was due to random causes, while the increases at the end of the century shown by all the models supports CO2 as an external forcing of the Arctic climate system.
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