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Catastrophic collapse of the Greenland ice cap could occur within 100 years, by itself raising sea levels by ~ 30'. That would make almost all coastal cities in the USA non-viable. Due to ocean floor morphology this effect will be worse on the US Atlantic seaboard than in Europe, but still it would be catastrophic for much of coastal Europe.

Current estimates of around 3 feet of sea level rise by 2100 are based on assumptions that the Greenland ice sheet will meld in the same way as an ice cube on a saucer melts. That is obviously an unsound, if soothing, assumption. Gravity plays a major role with ice sheets, as does melt water streams cutting through and under glaciers.


"It is not necessary to have hope in order to persevere."

by ARGeezer (ARGeezer a in a circle eurotrib daught com) on Tue Jul 9th, 2019 at 07:04:41 PM EST
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