Source: NASA Godard centre or directly from here (7 MB .tiff file!)
If you look at this graph in detail, you
can see that the retreat in the period 1929-1953 (24 years) was faster
than in 1953-2003 (50 years).
Thus all together, the retreat of Greenland ice is the result of global warming at least since 1850, and the retreat was faster around 1930-1940 than today, when GHGs were not playing any important role.
Moreover, the summer temperatures around Greenland in recent years (still) are slightly less than in the 1935-1950 period...
Btw, this glacier is one of the most impressive parts of Greenland, see our visit there in 2000...
Thus all together, the retreat of Greenland ice is the result of global warming at least since 1850, and the retreat was faster around 1930-1940 than today, when GHGs were not playing any important role.
Moreover, the summer temperatures around Greenland in recent years (still) are slightly less than in the 1935-1950 period...
Btw, this glacier is one of the most impressive parts of Greenland, see our visit there in 2000...
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