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Politics : The Environmentalist Thread
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To: Skywatcher who wrote (5819)2/4/2006 10:01:27 AM
From: Alastair McIntosh  Read Replies (2) of 36917
 
Here is a better look at the mass balance of the Greenland ice sheet:

esa.int

This study shows that the mass of the ice sheet is actually increasing.

excerpt:

By combining tens of millions of data points from ERS-1 and ERS-2, the team determined spatial patterns of surface elevation variations and changes over an 11-year period.

The result is a mixed picture, with a net increase of 6.4 centimetres per year in the interior area above 1500 metres elevation. Below that altitude, the elevation-change rate is minus 2.0 cm per year, broadly matching reported thinning in the ice-sheet margins. The trend below 1500 metres however does not include the steeply-sloping marginal areas where current altimeter data are unusable.

The spatially averaged increase is 5.4 cm per year over the study area, when corrected for post-Ice Age uplift of the bedrock beneath the ice sheet. These results are remarkable because they are in contrast to previous scientific findings of balance in Greenland's high-elevation ice.
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