Signs of reversal of Arctic cooling in some areas

Parts of the Arctic have cooled clearly over the past century, but temperatures have been rising steeply since 1990 also there. This is the finding of a summer temperature reconstruction for the past 400 years produced on the base of tree rings from regions beyond the Arctic Circle. German and Russian researchers analysed tree growth using ring width of pine from Russia's Kola Peninsula and compared their findings with similar studies from other parts of the Arctic.

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