Tuesday, December 6, 2011


From: Matthew Salzer <msalzer@POSTAL.AERO.UND.EDU>
Subject: AZ510: No Correlation
Date: Tue, 27 Apr 1999 11:05:47 -0500
Reply-to: grissino@VALDOSTA.EDU


I've had some experience with bristlecone pine on the San Francisco Peaks
and you are correct in noting their lack of correlation with precipitation
records and with other precipitation sensitive tree-ring chronologies like
Slate Mtn. Ponderosa. There is no "problem" with the AZ510 chronology; it
is, as suggested by Dave, Connie, and Jim, a chronology constructed from
trees whose growth is not primarily limited by precipitation. Site location
and tree species are critical when comparing chronologies and evaluating
climate - tree growth relationships.

We've collected in the Peaks recently as part of an ongoing archaeological
and paleoclimate project and have built a chronology extending back to 663
BC, more than 1200 years longer than the AZ510 chronology collected by Don
Graybill in the early 1980's. We're working on a temperature reconstruction
from this chronology that should prove to be a valuable addition to the
already extensive archive of southwestern USA paleoenvironmental research.

Matt Salzer

Laboratory of Tree-Ring Research
University of Arizona

Upper Midwest Aerospace Consortium

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