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This thread began with a link to a chat by Naomi Oreskes. I need to
bring up the point that she published a paper in Science 03 Dec
2004, in which she claimed to have reviewed all 928 papers written
on climate change from 1993-2003 and found that 75% conclude
explicitly or implicitly that we are causing global warming and the
other "25% dealt with methods or paleoclimate, taking no position
on current anthropogenic climate change". Paper is at http://
www.sciencemag.org/cgi/content/full/306/5702/1686
Unfortunately for Naomi, Benny Pieser of Moores U in UK, yes a
skeptic and an anthropologist to boot, re-ran her data and found
glaring errors. http://www.staff.livjm.ac.uk/spsbpeis/NationalPost.htm
His findings after reviewing the same 928 papers and 200 more he
found were that only 13 papers (<2%) explicitly agreed with
anthropogenic causes. When taken to task, Oreskes agreed that
"there was indeed a serious mistake in the Science essay."
Take it for what it's worth, but I find little faith in anyone,
regardless of their credentials, passing off information that just
isn't so.
I don't see any obvious contradiction between the statements above
from Oreskes and Pieser. Moreover, I note that in Pieser's essay he
writes, "According to an essay by Naomi Oreskes, published by Science
in December, 2004, there is unanimous "scientific consensus" on the
anthropogenic causes of recent global warming." But Oreskes simply,
unequivocally said no such thing in her essay. Finally, the
statement that, "Oreskes agreed that 'there was indeed a serious
mistake in the Science essay,'" appears, at best, to have been taken
out of context. From what I can tell, she seems to have been
referring to errors in assembling her data set--errors that wouldn't
seem likely, as far as I can tell, to bias the set. Contrary to the
implication, she does not seem to be referring to errors in her
analysis of the data set. (I haven't been able to track down a
source for her statement. The references I have found point to a
page at davidappell.com, a domain that apparently no longer exists.)
I appreciate the fact that Oreskes' work has been misrepresented by
those on the anthropogenic warming side of the fence, including Al
Gore, but it seems to me that Pieser's work is at least inexcusably
sloppy and possibly willfully dishonest. Accordingly it seems to me
that he is easily dismissed as a credible critic for precisely the
reasons Daryl states in the last sentence above.
John Mallinckrodt