NYT: Climate Expert Says NASA Tried to Silence Him

The top climate scientist at NASA says the Bush administration has tried to stop him from speaking out since he gave a lecture last month calling for prompt reductions in emissions of greenhouse gases linked to global warming. The scientist, James E. Hansen, longtime director of the agency's Goddard Institute for Space Studies, said in an interview that officials at NASA headquarters had ordered the public affairs staff to review his coming lectures, papers, postings on the Goddard Web site and requests for interviews from journalists...

After that speech and the release of data by Dr. Hansen on Dec. 15 showing that 2005 was probably the warmest year in at least a century, officials at the headquarters of the space agency repeatedly phoned public affairs officers, who relayed the warning to Dr. Hansen that there would be "dire consequences" if such statements continued, those officers and Dr. Hansen said in interviews.

"He's not trying to create a war over this," said Larry D. Travis, an astronomer who is Dr. Hansen's deputy at Goddard, "but really feels very strongly that this is an obligation we have as federal scientists, to inform the public." Dr. Travis said he walked into Ms. McCarthy's office in mid-December at the end of one of the calls from Mr. Deutsch demanding that Dr. Hansen be better controlled...

The fight between Dr. Hansen and administration officials echoes other recent disputes. At climate laboratories of the National Oceanic and Atmospheric Administration, for example, many scientists who routinely took calls from reporters five years ago can now do so only if the interview is approved by administration officials in Washington, and then only if a public affairs officer is present or on the phone...