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Re: Brrr, bone chilling paleopolar summers(Polar dinosaur growth and other new papers)

I'm curious how we can derive such detailed paleoclimate models that allow estimates of seasonal temps in specific locales. In another currently popular thread on bird, err, Aves, phylogeny I read about the difficulty in dealing with "species" for paleontological datasets. What kind of testable hypotheses do paleoclimate models provide? It seems to this casual observer that information in the fossil record on the climate of a particular environment is tied, at least in part, to information on the numbers and types of "species" in the environment.

Please pardon my ignorance. Does sedimentology or some other non-biological record provide additional useful information to describe paleoclimates?



Ar 8/6/2011 4:21 PM, scríobh Jura:

----- Original Message -----

From: Scott<hmwh@comcast.net>
To: GSP1954@aol.com; dinosaur@usc.edu
Sent: Saturday, 6 August 2011 3:42 PM
Subject: Re: Brrr, bone chilling paleopolar summers(Polar dinosaur growth and 
other new papers)

So, living conditions sound considerably better in polar Alaska 65 MYA than here
in the Northeast Kingdom of Vermont USA, where the average ANNUAL temperature is
39.5 F and the winters have been known to get as low as 40 below zero...no
bradyenergetic crocs here either.

Scott Perry
High Mountain Writers' House
Irasburg, VT

No crocs, but seven turtles, one lizard and eleven snakes.

Then there are the more northerly countries like Sweden, Denmark and Finland. 
Their average temperatures are substantially more harsh than Alaska, or 
Victoria would have been in the Cretaceous, and all of them house 
bradymetabolic reptiles, amphibians, fish, and insects.

I'd bet dollars to donuts that the only reason we haven't found "classic 
reptiles" in the North Slope is because we haven't been looking that hard for them.