It's the end of the beginning;

A catastrophic heat wave appears to be closing in on the Intergovernmental Panel on Climate Change. How hot is it getting in the scientific kitchen where they've been cooking the books and spicing up the stew pots? So hot, apparently, that Andrew Weaver, probably Canada's leading climate scientist, is calling for replacement of IPCC leadership and institutional reform.

If Andrew Weaver is heading for the exits, it's a pretty sure sign that the United Nations agency is under monumental stress. Mr. Weaver, after all, has been a major IPCC science insider for years. He is Canada Research Chair in Climate Modelling and Analysis at the University of Victoria, mastermind of one of the most sophisticated climate modelling systems on the planet, and lead author on two recent landmark IPCC reports.

For him to say, as he told Canwest News yesterday, that there has been some "dangerous crossing" of the line between climate advocacy and science at the IPCC is stunning in itself.

Not only is Mr. Weaver an IPCC insider. He has also, over the years, generated his own volume of climate advocacy that often seemed to have crossed that dangerous line between hype and science.