Gulf Stream 'is not slowing down'

http://news.bbc.co.uk/2/hi/science/nature/8589512.stm

.....
"The changes we're seeing in overturning strength are probably part of a natural cycle," said Josh Willis from Nasa's Jet Propulsion Laboratory (JPL) in California.
"The slight increase in overturning since 1993 coincides with a decades-long natural pattern of Atlantic heating and cooling." .....

From Ace Of Spades H.Q.

So let me get this straight. Simulations by some of the most well-known and important climate scientists tell us that global warming is slowing the Gulf Stream and could render the UK and northern Europe a frozen wasteland unless we return them, and ourselves, to pre-industrial sustainable societies. But some yahoos with a satellite actually went out and measured the thing?

 

What is the difference between speed and velocity ?