By pioneering the science of seasonal hurricane forecasting, William Gray turned a university far from the stormy seas into a hurricane research mecca.

But last year, the long-term relationship between Gray and Colorado State University, where he has worked for nearly half a century, nearly unraveled in an episode that highlights the politically charged atmosphere that surrounds the global warming debate.

University officials told Gray that handling media inquiries related to his forecasting required too much time and detracted from efforts to promote other professors' work.

"This is obviously a flimsy excuse and seems to me to be a cover for the Department's capitulation to the desires of some (in their own interest) who want to reign (sic) in my global warming and global warming-hurricane criticisms," Gray wrote in the memo, obtained by the Chronicle.

Gray initially declined to speak about the issue, but on Tuesday Gray acknowledged the dispute.