In 1769, Joseph Priestley warned that scientists overly attached to a favorite hypothesis would not hesitate to “warp the whole course of nature.
There was never any question about the existence of the Medieval Warm Period. This graph was in the 1990 IPCC Report
Scientists have known about the MWP for centuries.
In the Swiss Alps the ice line has invaded summits formerly covered with magnificent forests, of which the massive trunks and sturdy roots are still found in situ.
Iceland and Eastern Greenland have become much colder since the fourteenth century; for in the former large trees have ceased to grow, while on the opposite shores of the latter a great number of valleys, once inhabited, are now completely inaccessible, owing to the intrusion of glaciers.
But the Medieval Warm Period destroyed global warming theory, so Michael Mann made it disappear.
I received an astonishing email from a major researcher in the area of climate change. He said, “We have to get rid of the Medieval Warm Period.”
Dr. David Deming
University of Oklahoma College of Earth and Energy
the MBH (Mann Bradley Hughes) camp have a fundamental dislike for the very concept of the MWP, so I tend to view their evaluations as starting out from a somewhat biased perspective, i.e. the cup is not only “half-empty”; it is demonstrably “broken”.
I just don’t want to get into an open critique of the Esper data because it would just add fuel to the MBH attack squad. They tend to work in their own somewhat agenda-filled ways. We should also work on this stuff on our own, but I do not think that we have an agenda per se, other than trying to objectively understand what is going on.
Dr. Edward R. Cook
Director, Tree-Ring Laboratory
Lamont-Doherty Earth Observatory
Likewise, there was never any question about the existence of the spike in temperatures in 1940, and subsequent cooling. This graph was in the 1975 National Academy of Sciences Report
The “1940’s blip” wrecked global warming theory, so climate scientists made it disappear, through a series of repeated data tamperings.
From: Tom Wigley <firstname.lastname@example.org>
To: Phil Jones <email@example.com> Subject: 1940s
Date: Sun, 27 Sep 2009 23:25:38 -0600
Cc: Ben Santer <firstname.lastname@example.org>
It would be good to remove at least part of the 1940s blip, but we are still left with “why the blip”.
Likewise, there was never any doubt about the “global warming hiatus”
The fact is that we can’t account for the lack of warming at the moment and it is a travesty that we can’t
– Kevin Trenberth NCAR
October 12, 2009
Satellites show the planet cooling in the 21st century
Had Crut 3 showed the planet cooling in the 21st century
This wrecked global warming theory, so the scientists massively altered the data again.
Climate science has been corrupted by a small handful of individuals, who have repeatedly and blatantly corrupted the temperature record to achieve political objectives.