Subject:
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Re: Global Warming (was: Re: Why is AIDS such a big deal?)
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Newsgroups:
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lugnet.off-topic.debate
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Date:
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Wed, 10 May 2000 19:28:53 GMT
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Viewed:
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584 times
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Jeff Stembel wrote:
> I'd like to hear where you read there wasn't enough ice in the caps to raise
> the sea level much. I saw a report (on the Discovery channel, I believe) that
> at one point, millions of years ago, the sea level was a couple *hundred* feet
> higher, due to the fact that there were no ice caps.
Jeff is correct. See my last post(5623).
For general information- scientists measure the amount of ice on the
planet at a given time by looking at oxygen isotope ratio in deepsea
sediment cores. ^16-O is selectively stored in ice over the heavier
^18-O. When you see more ^16-O in the sediment cores you can tell
the climate was warmer, when there is less or none- it was
colder. This is the main method scientist use to estimate that
factor in past climates.
-chris
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