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Politics : The Environmentalist Thread -- Ignore unavailable to you. Want to Upgrade?

To: TimF who wrote (17973)	12/4/2007 12:38:33 PM
From: Wharf Rat	Read Replies (3) \| Respond to of 36917

"And there is some evidence that as far as Greenland goes the melting may be slowing." No, there's not; not on this planet. In the past two years, though, two studies using very different methods have suggested that the ice sheet is now melting much faster than expected — at a rate of 200 to 250 cubic kilometres a year. According to the most recent study, which used satellite measurements of Earth's gravity to estimate changes in Greenland's mass of ice, that rate has doubled in the past 10 years. theglobeandmail.com === In 2001 NASA scientists published a major study based on observations by satellite and aircraft. Scientists have traced the retreat of the Sermilik glacier It concluded that the margins of the Greenland ice-sheet were dropping in height at a rate of roughly one metre a year. Now, amid some of the most hostile conditions anywhere on the planet, Carl Boggild and his team have recorded falls as dramatic as 10 metres a year - in places the ice is dropping at a rate of one metre a month. news.bbc.co.uk === Greenland ice melt speeds up Warming: Trend is confirmed via satellite, flyovers -- The satellite data also showed that last summer the island experienced more days of melting snow and at higher altitudes than the average of all the past years -- particularly in the southern part of the island, he said. Melting snow is more significant than just another indicator of global warming, both Tedesco and Krabill said, for in many areas near the coast the water can drain through surface cracks and vertical passages inside the glaciers and reach bedrock where it lubricates the ice sheet and speeds the flow of the glaciers to the ocean. sfgate.com