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Tuesday, August 16, 2011

Greenland Ice-melt

My flight home to Canada had one worth-while bonus, making up for the problem that cut out the electronics of the in-flight movie system, which deprived us of the chance to watch any of the 120 or more movies on the menu. We flew over Greenland, well north of the southern tip of the island. The clouds had lifted so I had an unobstructed view from 10 Km above as our plane crossed the island. I have two views of Greenland in a deck of slides on "Human Health in our Changing World", a satellite image showing the extent of summer ice-melt in 1992 and 2002, and a photo from a passenger plane window in September 2005 of small islands off the southern tip, all just bare black rock with a few skiffs of snow on high tops of some of them. What I saw was even more dramatic evidence of global warming. There was much bare black rock where years ago I remember snow at this time of year. I saw many very large lakes of melt-water,which I know from articles I've read, are draining into the sea; and all along the coast were glaciers with their noses in the sea, which was flecked with innumerable icebergs scattering far to the south and west, all adding water to the sea from well above present sea levels. Greenland ice-melt is one of the main contributors to sea level rise which is happening at an increasing rate, will raise the sea level by at least a meter before 2100 (the most conservative estimate) and by a great deal more, 5-7 meters if worst-case scenarios occur. Those who deny climate change and global warming should be made to observe Greenland late in the summer. I was seeing it earlier than late summer. The evidence and the effects of melting ice will be more obvious in 6-10 weeks from now. And this hasn't even been a hot summer in Greenland.

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