How reliable are tree rings for climate modeling?


by Mk
Tags: climate, modeling, reliable, rings, tree
Mk
Mk is offline
#1
Mar11-06, 12:47 AM
P: 2,057
As historical thermometers, tree rings are so bad scientists have to cherry pick samples, removing those that do not exhibit a desired response and so inconsistent as to be useless for temperature reconstruction.
I won't say who said it, but does this sound right to you? Dendrochronolgists on TV all say it so easy, you count the tree rings and the space in between, and that will tell you about the temperature and precipitation and how long the tree lived.
Also:
As historic thermometers, tree rings are adequate, because confounding factors like moisture availability, nutrients, etc.... are accurately known
This sounds kind of dumb, but what about carbon dating? We assume the ambient carbon (or something like that) stayed the same the whole time. But didn't it change? What about between mass extinctions?
Phys.Org News Partner Earth sciences news on Phys.org
BobK
BobK is offline
#2
Mar11-06, 01:00 AM
P: 12
I don't see how tree rings can be reliable.

Various factors go into a tree's growth pattern. Fertilization, sunlight, precipitation, temperature, and probably others I haven't considered. All of which can vary in different ways over the years.

I frankly think they are fooling themselves when they say they can extract accurate temperature data from the ring width or density.


Register to reply

Related Discussions
VOTE PF Photo Contest - O' Christmas Tree, O' Christmas Tree General Discussion 9
PF Photo Contest - O' Christmas Tree, O' Christmas Tree (12/7-12/13) General Discussion 39
climate modeling General Physics 0
Climate Extremes: Observations, Modeling, and Impacts Earth 15
UK enlists world's help to predict climate [computer modeling] Computing & Technology 1