The good news? It will be after we're all dead.
Yes, in a hundred years we may see a
5-10 meter rise in ocean levels. Maybe it's time to reconsider this global warming doesn't exist crap.
The apparent sensitivity of ice sheets to a warmer world could prove disastrous. The greenhouse gases that people are spewing into the atmosphere this century might guarantee enough warming to destroy the West Antarctic and Greenland ice sheets, says Oppenheimer, possibly as quickly as within several centuries. That would drive up sea level 5 to 10 meters at rates not seen since the end of the last ice age. New Orleans would flood, for good, as would most of South Florida and much of the Netherlands. Rising seas would push half a billion people inland. "This is not an experiment you get to run twice," says Oppenheimer. "I find this all very disturbing."
...
In another approach to estimating mass balance, researchers sketch the changing shape and therefore volume of the ice sheet. In a paper just out in the Journal of Glaciology, glaciologist Jay Zwally of GSFC and colleagues use satellite radars to measure the height of the Greenland Ice Sheet's broad plateau and airborne laser altimeters to monitor the height of glaciers draining to the coast, which are too small for satellite radars to see reliably. "We have strong evidence the ice sheet was near balance [during] the last decade of the 20th century," says Zwally. "Our measures show a slight positive gain of 11 [cubic kilometers] per year" between 1992 and 2002.
Global warming contrarians have already taken up Zwally's result as evidence that nothing much is happening with the ice sheet, so there's nothing to worry about. Zwally disagrees. "There's no question there's been an acceleration of some of Greenland's glaciers over the last 5 years," after his surveys were completed, he says. "I would say that right now the current loss is 30 to 40 [cubic kilometers] per year," he says, based on his gut feeling about the most recent radar and laser observations.
That's getting close to the mass loss reported last fall using a third approach: repeatedly weighing the ice sheet. Geophysicists Isabella Velicogna and John Wahr of the University of Colorado, Boulder, reported in Geophysical Research Letters how the two satellites of the Gravity Recovery and Climate Experiment (GRACE), flying in tandem, gauge the mass beneath them. They precisely measure the changing distance between them caused by the gravitational pull of the passing ice. Between 2002 and 2004, GRACE found a loss of about 82 cubic kilometers of ice per year.
Goodbye Florida, hello beachfront property in Charlotteville.
**Update**
In related news,
Glacier National Park needs a new name.
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