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To: Roebear who wrote (79023)	11/14/2000 11:47:54 PM
From: isopatch	Read Replies (2) \| Respond to of 95453

Roebear/OT climate changes. When I took undergrad Geology my prof: was a leading expert on glaciers and polar climate. As this was in the mid-60s, Mrs Patch reminds me that putting such heavy demands on the memory is a losing proposition as the male brain begins shrinking after 40. Ah yes, connubial bliss<G>. Anyway, having made that disclaimer, here goes: In the study of polar ice cores, sea level changes and other evidence accumulated through geological research various theories have been put forward about how Ice Ages begin. One that sticks in my craw is Ewing & Donn's Theory. During periods of increasing global temperature, sea level will rise till it reaches a critical level allowing relatively warm water from the North Atlantic to enter Arctic Ocean and the North Polar region through what is a very wide but ordinarily shallow channel to the west of Greenland. As the higher sea level permits massive quantities of warm water to pour into the Arctic Ocean, over a period of decades or even centuries, it gradually creates (with the ice and very cold sub-polar water already resident there) a great deal of storm energy. In fact the result is a giant "storm engine" continually generates massive atmospheric fronts of snow and ice that sweep southward over the continental land masses of Europe Asia and N America. Glaciers grow and we have an ice age. I should dig out my old textbook and see how much the sea level actually needs to rise to trigger the massive water flow into the Arctic region. It would seem likely, however, that if Global Warming continues unabated it will eventually trigger this mechanism. Geez! See what a little bear market talk can produce! Time to catch a good movie and let the brain at least be entertained while it continues it's relentless shrinking<g> Isopatch