Source: NASA/GISS
Jacobshavn (Illulisat) station ceased
operation in 1980, but the nearby Egedesminde station can be used to
expand the trend.
As the summer temperatures are more important for ice edge/glacier melting, here the June-July-August temperatures:
The remarkable point is that, while yearly average temperatures after 2000 are near equal to the 1930-1950 temperatures, summer temperatures seems to be lower. And Egedesminde and nearby Jacobshavn (Ilulisat), have the same yearly trend, but the summers in Egedesminde are somewhat cooler...
As can be seen here and in the retreat of the largest (and fastest) Greenland glacier near Ilulisat, summer temperatures in the 1930-1950's were higher and the breakup point is retreating faster in the same period than today. As the temperatures were increasing in the period 1880-1930 (and the breakup point probably before 1850), this points to a general temperature increase, not directly related to the increase of greenhouse gases, which have their largest effect after 1945. Greenland temperatures seems to be more directly related to the NAO than to global temperature trends...
As the summer temperatures are more important for ice edge/glacier melting, here the June-July-August temperatures:
The remarkable point is that, while yearly average temperatures after 2000 are near equal to the 1930-1950 temperatures, summer temperatures seems to be lower. And Egedesminde and nearby Jacobshavn (Ilulisat), have the same yearly trend, but the summers in Egedesminde are somewhat cooler...
As can be seen here and in the retreat of the largest (and fastest) Greenland glacier near Ilulisat, summer temperatures in the 1930-1950's were higher and the breakup point is retreating faster in the same period than today. As the temperatures were increasing in the period 1880-1930 (and the breakup point probably before 1850), this points to a general temperature increase, not directly related to the increase of greenhouse gases, which have their largest effect after 1945. Greenland temperatures seems to be more directly related to the NAO than to global temperature trends...
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