This statement seems to be politically motivated, due to it's timing.
Again and again we see different sides of the argument telling us different things, but this time the statement is pretty unequivocal, possibly due to
the upcoming meetings, Prof Marburger seems to be setting his stall out as to his beliefs. This is interesting in the light of recent news
apportioning blame for GW to other sources.
He's also put in a measure of CYA by saying that temp changes can't be reliably estimated.
But to me, this just smacks of more scare tactics.
news.bbc.co.uk
(visit the link for the full news article)

