Northern Russia Summers 2.5 to 7C Warmer 7000 Years Ago
Here is yet more evidence of a much warmer climate during the mid Holocene Maximum period in the Arctic.
Radiocarbon-dated macrofossils are used to document the Holocene treeline history across nothern Russia (including Siberia).
Boreal forest development in this region commenced by 8000 BC.
Over most of Russia, forest advanced to or near the current Arctic coastline between 7000 and 5000 BC, and retreated to its present position by 2000 and 1000 BC.
Forest establishment and retreat was roughly synchronous across most of northern Russia.
Treeline advance on the Kola Peninsula however, appears to have occurred later than in other regions.
During the period of maximum forest extension, the mean July temperatures along the nothern coastline of Russia may have been 2.5 to 7C wamer than today.
Image: Twitter
The development of forest and expansion of treeline likely reflects a number of complimentary environmental conditions, including heightened summer insolation, the demise of Eurasian ice sheets, reduced sea-ice cover, greater continentality with eustatically lower sea level, and extreme Arctic penetration of warm North Atlantic waters.
Image: Wikipedia
The late Holocene retreat of Eurasian treeline coincides with declining summer insolation, cooling Arctic waters, and neoglaciation.
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Roger Higgs
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Thanks John.
Where does the text come from please. Also, especially, the exciting ‘Climate Cycles’ figure?
Best regards,
Roger
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