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Strategies & Market Trends : John Pitera's Market Laboratory -- Ignore unavailable to you. Want to Upgrade?

To: Steve Lee who wrote (6015)	4/26/2002 9:01:54 AM
From: Dan Duchardt	Read Replies (2) \| Respond to of 33421

Steve, Heck, these scientists can't even agree whether sea levels will rise or fall with global warming. Some say the ice will melt meaning more water and higher sea levels. Others point out that most of the ice caps are underwater and ice is less dense than water so in fact sea levels will fall when the ice melts. Actually, come to think of it, for floating ice both are wrong. Floating objects displace their own weight in water (Archamedies Principle). When an iceberg melts, the volume it will occupy will be exactly the same as the volume of an equal weight of water because that is what the iceberg becomes. So it will shrink into the space that it occupied below the water line causing no change at all in sea level. Ice over land mass is another story. When it melts it will flow to the sea eventually. I have no idea how much of the world's ice falls in that category. Dan EDIT: whyfiles.org Ice-sheet insanity. Melting glaciers are but a trickle of water on the planetary scale. They're small change compared to the West Antarctic Ice Sheet, which holds 3 million cubic kilometers of fresh water. Were it to melt, sea level would rise 20 feet, and coastal cities, not to mention beaches, would be in tough shape. Let me make one thing perfectly obscure Ice shelves melt all the time, "calving" icebergs that, no matter how enormous, do not effect sea level. Because floating ice displaces the same volume of water as melted ice, iceberg that formed from floating ice on Antarctica's vast ice shelves add no volume to the ocean.

To: Steve Lee who wrote (6015)	4/27/2002 6:18:36 PM
From: John Pitera	Read Replies (1) \| Respond to of 33421

Hi Steve, I lived in London in 1976. I went to the American School in London (ASL) which was in St. John's Wood. I was totally amazed that they allowed the students to smoke outside in the courtyard -g- That Summer was said to have been the hottest in 100 years in London, or at least exceptionally hot, especially during the period when they had Wimdbledon. Over 500 spectators fainted from heat one day I think I remember. It was a really cool experience living there. I visited Stone Hedge on July 4th 1976 with my family and family friends. I was disappointed that I missed the bicentennial, but made due. -g- I did not know you were English. The British Isles are a really fascinating place. :-) John