From	Connie Woodhouse (by way of "Henri D. Grissino-Mayer" )	Date	Mon, 26 Apr 1999 16:26:13 -0400
To	itrdbfor@listserv.arizona.edu
Subject	Re: Problem with "az510.crn": No Correlation
Dear Steve, AZ510.crn is a bristlecone pine chronology. I suspect the others you are working with are ponderosa pine or Douglas-fir. In this region, these lower-elevation species have quite a different response to climate than the bristlecone. I haven't worked with the AZ510 chronology, but I would guess that bristlecone tree growth at this site would be favored by warm winter temperatures and perhaps somewhat drier conditions, while the ponderosa and Douglas-fir do well under cool, wet winter conditions. This may be the reason for your poor correlations. regards, Connie Woodhouse Connie Woodhouse NOAA Paleoclimatology Program National Geophysical Data Center 325 Broadway Boulder, CO 80303 ph: (303)497-6297 fax: (303)497-6513 email: woodhous@ngdc.noaa.gov Institute of Arctic and Alpine Research Campus Box 450 University of Colorado Boulder, CO 80309 ph: (303)497-6297 fax: (303)497-6513 email: woodhous@culter.colorado.edu