The Gulf stream is not wind drive, it is to do with the interaction between fresh and saline water around Greenland, as mentioned by the previous post. The gulf stream sucks warm water from the west indies towards greenland. Weather systems feed from that energy in the same way that hurricanes feed from the warm water of the gulf of mexico. This gives tropical jet streams power to push arctic jet streams northwards away from western europe and parts of the US eastern seaboard, explaining why london does not have a similar climate to somewhere like moscow, which on the same lattitude. Take away the gulf stream and, apparently, England would have the climate of Spitzburgen (I think that's the name, an arctic island somewhere north of norway).

By the way, I've seen many people like Party Guy in other blogs that aim to deal with issues where there are strong vested interests. I have no doubt that there are people out there paid by vested interests to disrupt blogs and put doubt into people's minds, just as these corporations do with the media, spreading lies and commissioning "scientific" reports, like was done by Esso and the like to give the illusion that there is no consensus in the scientific community about global warming, and the same applied to the tobacco industry. They exhibit a similar technique, repeating commonly held myths with no backing and having a dismissive argumentative tone in their comments. Can spot em from a mile off. The thing is, that nobody in their right mind would spend so much time on a blog that was so anti their point of view, especially if they knew nothing about the subject and got slagged off all the time, unless they actually had a vested interest to do so.

"Nobody needs to go anywhere else. We are all, if we only knew it, already there." (Aldous Huxley "Island" 1962, p38)

This thread is now moribund, but this comment still merits a correction. The Gulf Stream today is part of the surface component of the Meridional Overturning Circulation, which is the North Atlantic part of the THC. If the extreme scenarios pan out and the THC weakens or shuts down because of icesheet melt, then the Gulf Stream will continue, it just won't be carrying heat to N. Europe. That heat will remain in low latitudes.

If you look at the flow over N. America you will note that just past the Rockies the flow drifts to lower latitude over the Great Plains, then swings back up to higher lats over the Eastern Seaboard. That swing is driven by a need to conserve angular momentum; it helps that the flow would otherwise be blocked by the N. Atlantic subtropical high (aka Bermuda or Azores High, depending on season). That swing is also what drives the Gulf Stream.

Weather systems feed from that energy in the same way that hurricanes feed from the warm water of the gulf of mexico.

Weather systems over the US and Europe are extratropical cyclones, which are completely different from tropical cyclones (though one can morph into the other, usually tropical to extratropical). The former is driven by thermal and humidity differences between airmasses and is controlled by the polar jet (which of course is a boundary itself), the latter is a heat engine converting warm ocean surfaces to high wind and heavy rain and form within an airmass.

Hi davet,

I just wanted to say "thanks" for your addition here.