http://www.grida.no/climate/ipcc_tar/wg1/435.htm
Looking at the IPCC chapter on the matter, I did find some
probabilities for the WAIS, namely a 98% chance that it'll contribute
less than 10 mm/yr by 2100 and another estimate of a 1% chance of the
sea level rise contribution being at least 0.3 m by 2100.
Sea level rise of 7 m by 2100 is not even discussed. For Greenland
rates of 10-70 cm per century are given, which with 12C warming over
Greenland would by the year 3000 lead to 7 m sea level rise from
Greenland.
And, I found this gem (considering the recent debate about the NAS
report and the meaning of plausible, and suggestions by RC that this
was a poor choice of wording with the IPCC being more precise ...):
It is, therefore, also plausible that WAIS may not make a significant
contribution to sea level rise over time-scales less than a millennium.
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