home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.environment:9981 sci.geo.meteorology:2577 sci.skeptic:13205
- Path: sparky!uunet!wupost!uwm.edu!rutgers!uwvax!meteor!tobis
- From: tobis@meteor.wisc.edu (Michael Tobis)
- Newsgroups: sci.environment,sci.geo.meteorology,sci.skeptic
- Subject: Re: The Younger Dryas? (was Re: Lawyer's science vs. unbiased presentation of the facts)
- Message-ID: <1992Jul23.182919.9200@meteor.wisc.edu>
- Date: 23 Jul 92 18:29:19 GMT
- References: <1992Jul22.154529.2614@midway.uchicago.edu> <1992Jul22.183704.10219@cs.tulane.edu> <1992Jul23.000540.4176@s1.gov>
- Organization: University of Wisconsin, Meteorology and Space Science
- Lines: 19
-
- In article <1992Jul23.000540.4176@s1.gov> lip@s1.gov (Loren I. Petrich) writes:
- >In article <1992Jul22.183704.10219@cs.tulane.edu> makrisna@convex1.tcs.tulane.edu (Krishna Achuta Rao) writes:
- >
- >: The Younger Dryas was a cold period during the last deglaciation (a
- >:return to near glacial conditions) and not a warming..... wasn't it?
-
- Yes, the last glaciation redeced at about 14,000 BP, and returned for
- about 1,000 years at 11,000 BP. Even more than the glaciation itself, the
- YD perturbation is centered on the North Atlantic, and is believed to
- be related to ocean circulation changes.
-
- > And what is the time resolution on Younger Dryas data, anyway?
-
- Eyeballing the best curve I've seen, It looks to be about on the order of
- a century, obtained from fossil plankton deposits.
-
- See Broecker "Unpleasant surprises in the greenhouse?" _Nature_ 328:123 (1987).
-
- mt
-