49981 Greenland temp (2)

Comment

Comment by Derek Alker on March 9, 2010 at 12:54am

Andre, - "Ice Cores and soo much more.."

http://www.globalwarmingskeptics.info/forums/thread-592.html

Comment by Derek Alker on March 8, 2010 at 1:38pm

Hello Andre, long time no talk. It is a long time since I visited your forum - ooops.

Did your paper get published - my apologies I should know shouldn't I.

Fortunately for what I was using the data for it did not matter whether it was accurate or not, I used it purely as a widely known data set from which to demonstrate how the Hockey Stick was made, using (illustrating) the same methods as Mann et al used.

I was aware there were serious concerns regarding the accuracy of the O18 temp reconstructions from ice cores from this web site / blog I also visit of occasion.
http://www.trevoole.co.uk/Questioning_Climate
More specifically,
http://homepage.ntlworld.com/jdrake/Questioning_Climate/_sgg/m5m1_1.htm

Questioning _Climate also frequents my "home" forum alot as well.
http://www.globalwarmingskeptics.info/forums/index.php

Comment by Andre Bijkerk on March 8, 2010 at 10:30am

Skeptics should not hesitate to challenge anything.

I challenge that "temperature" graph. Despite Dansgaards ideas that isotopes can be proxy for temperatures, it remains a logical fallacy, affirming the consequent.

http://en.wikipedia.org/wiki/Affirming_the_consequent

The problems are exposed, especially when comparing detailed studies of the Oldest Dryas or Pleniglacial (17.5 - 14.5 Ka Cal BP) also known as "Mystery Interval" (Denton et al, PAGES, 2006) and the Younger Dryas.

These isotope variations also show seasonality of precipitation but most likely predominantly aridness. See:

http://earth.myfastforum.org/about56.html

meaning that for the use of isotopes in paleoclimatology, we may as well start all over again

Andre