Word: greenlands
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...were, climate modeling would be a cinch. How much the globe will warm if we put a certain amount of CO2 into the air depends on the sensitivity of the climate. How vulnerable is the polar sea ice; how rapidly might the Amazon dry up; how fast could the Greenland ice cap disintegrate? That's why models like those from the Intergovernmental Panel on Climate Change spit out a range of predictions for future warming, rather than a single neat number...
...deal at the multinational climate summit set to convene in Copenhagen this December all the more pressing. And if you need one more reason to hope we at last get warming under control, consider this: The new study did not even consider the sea-level impact of Greenland, glaciers and other ice-capped lands melting. Add that water to the bucket, and you ought to get things sloshing but good...
Heat waves, droughts and mass extinctions are all potential threats from climate change. But the scariest risk has always been that of rapid sea-level rise caused by the collapse of the massive ice sheets in Greenland and Antarctica. There is enough water locked on Greenland alone to raise global sea levels by 23 ft. (7 m) if it melted, which would swamp coastal cities like London and Shanghai and all but wipe away small island states like the Maldives and Tuvalu. We can likely adapt, expensively, to higher temperatures and changing precipitation patterns, but it's difficult to imagine...
...seas might have risen by 6.5 to 10 ft. (2 to 3 m) over the course of 50 to 100 years - far faster than scientists had assumed. Only rapidly melting ice sheets could explain sea-level rise occurring that swiftly, which would indicate that the ice locked away in Greenland and Antarctica today might not be as safe as we had thought...
...century, with large regional differences around the world. At the lower end of the estimate, scientists say it's unlikely that seas will rise less than 50 cm even if we can get a grip on carbon emissions. The revised predictions are due to better data on melting in Greenland and Antarctica and from glaciers around the world, which are pouring water into the oceans and causing them to rise. Up to 600 million people in coastal areas around the world could be at increased risk for flooding. "Unless we take urgent and significant mitigation actions, the climate could cross...