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Politics : The Environmentalist Thread

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To: Land Shark who wrote (10668)	3/21/2007 9:40:30 AM
From: Thomas A Watson	Read Replies (1) of 36921

you should poke you finger in this, that scientist fool you like quote was going on and on about a few watts per square meter. Now it seems the earth has gone through a few hundred ice ages and it seems there is a corellation between this and the known variations of solar output.. Note: the changes in watts per square meter are proffered to be The paleoclimate record shows peaks at exactly those intervals. Ocean cores showed that the Earth passed through regular ice ages—not just the 3 or 4 recorded on land by misplaced boulders and glacial loess deposits—but 10 in the last million years, and around 100 in the last 2.5 million years. The Earth’s orbit varies over tens and hundreds of thousands of years. Combined changes in eccentricity, obliquity, and precession alter the strength and location of sunlight falling on the Earth’s surface. (Graphs by Robert Simmon based on data from Berger 1992.) earthobservatory.nasa.gov

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