Researcher on Climate Is Cleared in Inquiry

WASHINGTON

While the Pennsylvania State inquiry, conducted by three senior faculty members and administrators, absolved Dr. Mann of the most serious charges against him, it is not likely to silence the controversy over climate science. New questions about the work of the Intergovernmental Panel on Climate Change, to which Dr. Mann was a significant contributor, have arisen since the hacked e-mail messages surfaced last November.

That faculty board did not look into the science of climate change itself, the university said in announcing its results. That, it said, is