On Sept 12th 2005, Hurricane Katrina had already happened and Al Gore gave a speech on Hurricanes and Global Warming. He said (in part)
the scientific community is warning us that the average hurricane will continue to get stronger because of global warming. A scientist at MIT has published a study well before this tragedy showing that since the 1970s, hurricanes in both the Atlantic and the Pacific have increased in duration, and in intensity, by about 50 %. The newscasters told us after Hurricane Katrina went over the southern tip of Florida that there was a particular danger for the Gulf Coast of the hurricanes becoming much stronger because it was passing over unusually warm waters in the gulf. The waters in the gulf have been unusually warm. The oceans generally have been getting warmer. And the pattern is exactly consistent with what scientists have predicted for twenty years. Two thousand scientists, in a hundred countries, engaged in the most elaborate, well organized scientific collaboration in the history of humankind, have produced long-since a consensus that we will face a string of terrible catastrophes unless we act to prepare ourselves and deal with the underlying causes of global warming. [applause] It is important to learn the lessons of what happens when scientific evidence and clear authoritative warnings are ignored in order to induce our leaders not to do it again and not to ignore the scientists again and not to leave us unprotected in the face of those threats that are facing us right now. [applause]
But where are all the hurricanes today? By this time last year we had had nine named tropical storms and four hurricanes: Cindy, Dennis, Emily and Irene.
To date in 2006 we have had only three named Tropical Storms and no hurricanes.
Hurricanes require warm sea surface temperatures (SSTs), and last year the tropical Atlantic sea surface temperatures were running well above normal. Global warming was the explanation given by most 'experts' the media interviewed. And since global warming will only get worse, those SSTs were expected to just keep on increasing.
But now those same regions that had anomalously warm SSTs last year are -- gasp! -- near normal. The accompanying graphic shows large areas in the tropical Atlantic even a little cooler than normal.
And what's more
A new scientific article now accepted for publication in Geophysical Research Letters shows that the globally averaged upper ocean cooled dramatically between 2003 and 2005, effectively erasing 20% of the warming that occurred over the previous 48 years!
So what happens when the "Two thousand scientists, in a hundred countries, engaged in the most elaborate, well organized scientific collaboration in the history of humankind" are all wrong?