"Satellite records of the area covered by ice in the Arctic, for instance, stretch back only to 1979, and it was not until 2002 that researchers were able, courtesy of some new satellites, to estimate how the thickness of that ice varies over time and from place to place. Applied to land-covering ice sheets as well as the floating ice of the Arctic Ocean, this revealed that Greenland was losing more than 200 cubic kilometres of ice (though only 0.007% of its total volume) a year—three times previous estimates. (Emphasis added.)"
That means that it will take thousands of years to lose 1/2 of its ice volume. Hardly reason to panic given that just a few hundred years ago Greenland had no ice and was in fact green.
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