By Paul Homewood
We’ve been looking at recent changes in Arctic sea ice extent, but, to put them into perspective, we also need to consider some of the longer term ones.
In this post, I want to discuss how conditions in the Arctic have changed in the last 1000 years or so.
Most of us will probably be familiar with the evidence from Greenland ice cores, which clearly show warmer temperatures than now in the Middle Ages.
There is an abundance of evidence that supports this conclusion. The list is far too long to reproduce here, but there is an excellent summary at CO2 Science here. But the following give some idea:
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