http://wattsupwiththat.com/2009/11/29/when-results-go-bad/

He found e-mail correspondence between Phil Jones and Professor Wibjorn Karlen.

Professor Karlen plotted historical temperature data from the Nordic region, available from a source other than CRU, and compared that to the temperature plots for the same region produced by the IPCC, based on CRU data.

Karlen could not find the same extent of late 20th century warming as the IPCC, and asked Jones about it. Jones just blew him off.

Karlen extended his investigations to other parts of the world, and found the same thing in each case – that the temperatures reported by the IPCC were exaggerated when compared to temperature reported by other sources – national and regional organizations. Jones blew him off again.

It seems inescapable that CRU’s depradations include faking the temperature record to show warming higher than it really is.

On further investigation, Eschenbach also found that the CRU datasets include stations in major cities around the world, which builds in the Urban Heat Island effect to bias the temperatures upward.

This another hammer blow, and is likely to be replicated as other similar discoveries are made.

For example, in the GHCN (Global Historical Climate Network) temperature record, the number of reporting stations has been reduced from approximately 6,000 to approximately 1,000. http://chiefio.wordpress.com/2009/11/03/ghcn-the-global-analysis/ The effect of dropping the stations is that the remaining stations show dramatic warming in the Northern Hemisphere. If the missing NH stations are included, there is no warming. http://chiefio.wordpress.com/2009/10/18/the-northern-hemisphere-what-warming/

Examiner ^ | November 29, 2009 | Tony Hake
The fallout from the Climategate event continues as one of its primary participants, Dr. Michael Mann, is to be investigated by his employer, Penn State University. Among the more than one thousand emails released on the Internet, Mann featured prominently in many of them oftentimes making rather controversial comments. Mann serves as the director of the Earth System Science Center at Penn State and has long been one of the more controversial figures in the debate about manmade climate change. He is the author of the infamous ‘hockey stick’ graph which was used by Al Gore in “An Inconvenient Truth”…