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Strategies & Market Trends : Booms, Busts, and Recoveries

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To: Taikun who wrote (59314)1/24/2005 1:40:27 PM
From: Maurice Winn  Read Replies (1) of 74559
 
<I assume you think the reason the shape of the earth is more like a doughnut than a baseball has nothing to do with the weight exerted by the polar ice caps. Have you not read where melting ice caps take pressure off the poles and the shape of the earth changes. Movement of tectonic plates is a symptom of that.>

As elM mentioned there's a thing called isostacy. If all the ice melts off Antarctica, then the continent will rise, just as happened and is still happening in Northern Europe where the huge ice sheets melted.

The continents are all floating and when things are floating, they are nicely balanced. Earth's waistline won't increase or shrink with ice melting. The waistline is a function of rotational speed. As Earth spins slower, the waistline will shrink.

As elM also mentioned, a floating iceberg, such as the North Pole ice cap, is perfectly balanced. If it melts, there is no pressure change - it's not detectable elsewhere except for currents induced by density differences between salt vs fresh water. If you put a pressure measuring gadget on the ocean floor under the melting ice, you won't see the pressure reduce as the ice melts.

The Himalayas are like a giant iceberg, floating on a ball of liquid mantle. Google is great. Here's a picture: stvincent.ac.uk

Mqurice
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