Unless the freezing point of water has changed, the Arctic was very warm during the first half of the 2oth century.
18 Feb 1952 – POLAR ICE THAW INCREASING GLACIERS SAID TO [?] M…
NASA/NOAA apparently don’t want you to know this, because they have massively hacked the data to make the 1940s Arctic warmth disappear.
Isn’t Iceland contesting the changes to their temperature?
Paul Homewood has written about Iceland’s unhappy response to NOAA.