1,500 Years of Cooling in the Arctic

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1,500 Years of Cooling in the Arctic


4 Feb 08 – “The Arctic is melting, right? There is simply no questioning this pillar of the greenhouse scare, and images of ice melting, polar bears struggling, and indigenous people crying the blues are all part of any self-respecting presentation of global warming.

Imagine a study published in a major journal showing that a location in the Arctic has “a trend of -0.3°C over the last 1,500 years.”

                                “The new Torneträsk summer temperature reconstruction
                                shows a trend of -0.3°C over the last 1,500 years.”
                                (From Grudd, 2008)

“The article is forthcoming in Climate Dynamics, and the work was conducted by Håkan Grudd of Stockholm University’s Department of Physical Geography and Quaternary Geology, and despite the results, the research was not funded by industry. The focus here is the Torneträsk area in northern Sweden near 68.5°N (within the Arctic Circle) where Scots pines have been growing for millennia.

Grudd sampled living trees and collected subfossil samples found as dead wood on dry ground and from submerged logs retrieved from small mountain lakes. Many other studies have shown that the pines are sensitive to summer temperatures, so in theory, the tree samples should allow a very long term and relatively accurate reconstruction of past thermal conditions.

 “The late-twentieth century is not exceptionally warm in the new Torneträsk record: On decadal-to-century timescales, periods around AD 750, 1000, 1400, and 1750 were all equally warm, or warmer. The warmest summers in this new reconstruction occur in a 200-year period centred on AD 1000. A ‘Medieval Warm Period’ is supported by other paleoclimate evidence from northern Fennoscandia, although the new tree-ring evidence from Tornetraäsk suggests that this period was much warmer than previously recognised.” (emphasis added)

See entire article:




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