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Greenland’s ice sheet, which could be a major cause of rising sea levels, melted at a record rate in 2010. And a look at an ice field atop the highest mountain in the eastern European Alps suggests that the glacier may hold records of ancient climate extending back as much as a thousand years. We better investigate them quickly before it all melts away.If Greenland’s ice sheet melts, ocean levels would rise by over 20 feet, which would drown coastal cities around the world.
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In winter, Greenland is dark for months and this year the first, brief sunrise was expected on January 13. Instead, the sun rose at 12:56 PM on January 11. The precise reason for this remains unknown. There is no apparent astronomical cause, as the constellations, the moon and the sun appear to be in their usual positions in relation to earth. One possibility is that the horizon has changed due to accelerated ice melt in Greenland. Unlike lower latitudes, Greenland has experienced an unusually warm winter, and the ice pack to the north may have contracted so much that the sun is appearing earlier than usual.
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Part II – Is global warming yesterday’s news? A typical solar minimum lasts close to 500 days, and occurs between the solar maximums, which happen every 11 years. However, we have now had a little over 700 days without sunspots in the current solar minimum. Researchers are worried that the melting of the Greenland ice sheet this century may drive more water than previously thought toward the already threatened coastlines of New York, Boston and other northeastern coastal. Should they stop worrying?
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