Another "climategate" scientist exonerated

From the New York Times:

An American scientist accused of manipulating research findings on climate science was cleared of that charge by his university on Thursday, the latest in a string of reports to find little substance in the allegations known as Climategate.

An investigative panel at Pennsylvania State University, weighing the question of whether the scientist, Michael E. Mann, had “seriously deviated from accepted practices within the academic community for proposing, conducting or reporting research or other scholarly activities,” declared that he had not.

Dr. Mann said he was gratified by the findings, the second report from Penn State to clear him. An earlier report had exonerated him of related charges that he suppressed or falsified data, destroyed e-mail and misused confidential information.

The new report did criticize him on a minor point, saying that he had occasionally forwarded to colleagues copies of unpublished manuscripts without the explicit permission of their authors.

The allegations arose after private e-mail messages between Dr. Mann and other scientists were purloined from a computer at the University of East Anglia, in Britain, and posted on the Internet. In one, a British researcher called a data-adjustment procedure Dr. Mann used a “trick.”

The e-mail messages led climate-change skeptics to accuse mainstream researchers, including Dr. Mann, of deliberately manipulating the findings of climate science in order to strengthen their case that human activity is causing the earth to warm up.

“I’m aware, and many researchers now are keenly aware, of the depths to which the climate-change disinformation movement is willing to sink, to the point where they’re willing to criminally break into a university server and steal people’s personal e-mail messages,” Dr. Mann said in an interview.

Like the earlier report from Penn State, the new one was assailed Thursday by advocacy groups skeptical of the case for human-induced climate change.

“It’s no surprise that it’s a whitewash of Dr. Mann’s misconduct, because it was designed to be a whitewash,” said Myron Ebell, director of energy and global warming policy at the Competitive Enterprise Institute, a Washington advocacy group. He accused the panel of failing to interview important witnesses.

The panel did not try to vet the accuracy of the science published by Dr. Mann, including a famous finding that the temperature of the earth had jumped recently, compared with past climate inferred from indicators like tree rings. Instead, it examined his methodology — his analytical techniques, his willingness to share data with those skeptical of his findings and the like. The panel unanimously found his approach “well within the range of accepted practices.”

Two inquiries in Britain have largely exonerated the scientists there who were caught up in Climategate, though one report did offer minor criticism of statistical techniques.

Dr. Mann remains under investigation by the attorney general of Virginia for research he did at the University of Virginia.