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Pastimes : The New Qualcomm - write what you like thread.
QCOM 174.01-0.3%Nov 14 9:30 AM EST
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To: John Dough who wrote (1067)11/19/1999 3:53:00 PM
From: Maurice Winn  Read Replies (2) of 12232
 
Why melting North Pole ice doesn't raise sea level.

The part sticking up above the surface is held up there because the stuff under the water is less dense than the surrounding water, so it floats at exactly the right level so the extra weight held above water matches the difference in weight between the water and the ice under the water.

As the ice melts, it shrinks as it turns to water. So it takes up less space, so all the stuff above the surface and all the stuff below the surface fits into the same space that was taken up by the submerged part.

The weird shrinkage of water as it cools from 20 degrees down to 0 degrees means it reaches a maximum density at about 4degrees, then expands again as it cools further and expands further on forming ice. That's to do with the electrical bonds between the water molecules which pull the molecules together.
The Web is great - just did a search and here's an explanation:
edie.cprost.sfu.ca

As AJ wrote, the big impact on sea level is heating of water. 4 kilometres of ocean getting 4 degrees warmer would cause huge flooding!!! So would ice melting on Greenland and Antarctica and running into the sea! But there is plenty of land at higher levels. So no real worries. The DCF on the real estate at sea level would show that the value of it would be well expired by the time it gets wet.

There will be some migration needed from some low lying countries.

Mqurice
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