March 26_NH

March 26_NH - March 26, 2012 Mt. Kilimanjaro, Tanzania o...

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March 26, 2012 Mt. Kilimanjaro, Tanzania o About 85% of the ice present in 1912 was gone by 2007 o More than a quarter of the ice present in 2000 was gone by 2007 o Kilimanjaro glaciers are retreating and thinning o Glacial retreat attributed to warming and reduced snowfall Could global warming introduce a new Ice Age? o Possibly because the North Atlantic Drift could be shut off if the glaciers from Greenland melt The freshwater and salt water don’t mix well because of salinity Pleistocene Epoch o The Pleistocene began about 2 million years ago o During the Pleistocene, about 1/3 of the land area of the earth was ice-covered o There have been numerous “inter-glacial” periods during the Pleistocene Causes of Glacial Events o Astronomical cycles (Milankovitch) Earths tilt ranges from 21.5 – 24.5 degrees (long cycles) If the earth was not tilted, there would be an end of seasons Earth’s eccentricity – earth’s rotation around the sun is an ellipse and
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This note was uploaded on 03/31/2012 for the course GEOG 110 taught by Professor Monson during the Winter '12 term at BYU.

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March 26_NH - March 26, 2012 Mt. Kilimanjaro, Tanzania o...

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