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- Xref: sparky sci.environment:9912 sci.skeptic:13156
- Path: sparky!uunet!paladin.american.edu!europa.asd.contel.com!emory!wa4mei!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Newsgroups: sci.environment,sci.skeptic
- Subject: Re: Ice ages ("Global Warming")
- Message-ID: <1992Jul24.055453.5807@ke4zv.uucp>
- Date: 24 Jul 92 05:54:53 GMT
- References: <1992Jul12.215924.3098@meteor.wisc.edu> <h_#mr3c.payner@netcom.com> <1992Jul13.173449.17657@meteor.wisc.edu> <1992Jul18.045250.140@uwm.edu>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Gannett Technologies Group
- Lines: 24
-
- In article <1992Jul18.045250.140@uwm.edu> markh@csd4.csd.uwm.edu (Mark William Hopkins) writes:
- >
- >I don't see any problem. Every one of these observations, and the whole
- >Ice Age itself can be explained away by simply assuming that it was the
- >POLAR AXIS that was located south toward Greenland in this period.
- >
- >And that something caused the axis to be bumped up toward the present North
- >Pole in a relatively short time in under 10 to 20 thousand years.
-
- This seems highly unlikely on physical principles. The Earth's crust is
- fairly rigid and the mass distribution of the mantle and core are fairly
- well fixed. Changing the location of the rotational axis would require
- an enormous energy input that would have catastrophic effects well beyond
- the reputed dinosaur killer. There is no evidence for such an incident.
- On the other hand, wanderings of the *magnetic* pole are well documented.
-
- On the chance that you really meant a shift in the rotational axis with
- respect to the ecliptic, I was about to write a sarcastic flame about the
- amount of energy that would be required for such an axial shift, then the
- terms "precession" and "chaotic attractors" collided in my brain. Perhaps
- there is something to this idea. Anyone brave enough to attempt a calculation,
- or perhaps to present evidence that this is also an impossible mechanism?
-
- Gary
-