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20 Oct 09) — New ground measurements by the West Antarctic GPS Network (WAGN) project suggest the rate of ice loss of the West Antarctic ice sheet has been slightly overestimated, says this article in Science Daily.
"Our work suggests that while West Antarctica is still losing significant amounts of ice, the loss appears to be slightly slower than some recent estimates," said Ian Dalziel, lead principal investigator for WAGN.
Starting about 20,000 years ago, the Antarctic Ice Sheet began slowly thinning and retreating. As the weight above it diminished, the bedrock below the ice began rising, or rebounding.
The new GPS measurements show West Antarctica is rebounding more slowly than once thought, meaning that the rate of ice loss is slower than previously interpreted.
“WAGN researchers do not yet know how large the overestimation was,” the article continues.
"So the take home message is that Antarctica is contributing to rising sea levels,” said Dalziel. “It is the rate that is unclear."
They may “not yet know how large the
overestimation was,” but they
Let me give you this comparison.
If the entire United States
were covered by ice, the area where the ice
entire Antarctic Ice Sheet into consideration, it looks to me as
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