Steve, Don, Lee;
Thanks for all the interesting notes. It sure takes a
lot of detective work putting the pieces of the puzzle together.
You're right Steve; temperatures don't necessarily have
to be higher during drought years.
But the fire record recorded in those rings certainly
proves that fire is a natural part of the ecosystem and that fire
suppression has been a disaster and many disasters to come.
But the tree ring data I appreciate the most is seeing
how trees respond to thinning by greatly increased diameter growth.
Mike
Mike,
Dendrochronology is a fascinating study, albeit it still
seems to be in its infancy (from what I've read about the subject). Dr.
Henri Grassino-Mayer (google him) seems to be the leader in this young
field (without offering offence to any dendrochronologists who may
monitor this board). He recently analyzed a Stradivarius violin to
confirm its' age
(http://news.nationalgeographic.com/news/2004/01/0107_040107_violin.html
), ironically, the question was, was the violin created during a "mini
ice-age" (must have been during Global Cooling).
A few years ago, dendrochronology was implemented on
some stumps in the Pike National Forest in Colorado, near the US Forest
Service Research lodge. Through detailed logging records and the normal
low humidity in the Rocky Mountains, stumps still remain from some of
these trees (Ponderosa pine) that were logged in the 1870s (forget the
exact year, but was recorded). The stumps would serve as the base. The
main focus of the study was fire history in the region. Some of the
conclusions reached from the rings included a somewhat, although
inconsistent fire cycle of around 13 years. Some fires were hotter than
others. Drought years can be determined although temperature ranges
seem to be a little inconclusive. Perhaps assumptions are that during
drought events, temperatures are higher (but how much higher?). Climate
change proponents have made many assumptions that are not conclusive
without doubt concerning tree ring size and shape.
Concerning the 600A.D. date of recorded climate data
from tree rings, I would question this. The samples used at Pike
National Forest only went back to the 1400's and they were inconclusive
regarding pin-pointing temperatures in the region.
Sorry Don, but your arguments for the Global Warming /
Worldwide Climate change are built on shifting sands in my view.
Steve Springer
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