Sunday, July 22, 2007

Rising seas


Here's a CNN article about the rising sea level:

WASHINGTON (Reuters) -- Don't worry too much, for now, about rising seas caused by melting ice in Greenland and Antarctica. The big threat this century could come from small thawing glaciers, researchers reported Thursday.

Even though these glaciers contain only 1 percent of the water tied up in the great ice sheets of Antarctica and Greenland, they could account for 60 percent of an anticipated rise in the world's sea level by the year 2100.

Sea-level rise is seen as a key consequence of global warming, and much of the concern has focused on the big ice sheets that contain the vast majority of the world's ice.

Researchers writing in the online journal Science Express estimate melting glaciers, which are located all over the globe including in the tropics, could add between 4 and 10 inches to world sea level this century.

While this may not sound like much, consider that some 100 million people live within 3.3 vertical feet of sea level, said Mark Meier of the University of Colorado-Boulder, a lead author of the study.

"If we had almost a foot (of sea-level rise) just due to the small glaciers, add that to the amount due to the ice sheets, which could be appreciable by 2100, and add to that the ocean warming which will cause it to expand in volume, then we get a rise that we can't ignore," Meier said in a telephone interview.

Even a tiny amount of sea-level rise can make a vast inland incursion of water in flat coastal areas, as much or more than 100 times the distance inland as the height of the rise, he said.

We are completely screwed.

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