
Originally Posted by
iguana1
Not going to touch the Climate Change debate, but just the physics of the whole thing. I think the water temp deviation now probably has almost no effect on summer temps. The water column is pretty deep and we are only seeing surface temps that are driven in the short term by air temps. Long terms temps are much less variable and are also driven by currents. My understanding is that the Labrador current is the primary driver of our temperatures north of the cape. The Labrador current strength is much more a function of the winds and other climate issue far north of us.
There is a much scarier scenario in the long term as there is documented evidence that the Gulf Stream has weakened by about 30%. The Gulf Stream is driven by cold, saline water in the far North Atlantic sinking traveling south along the floor of the Atlantic and upwelling driving the GS north. Warmer weather in the Arctic combined with ice-melt is slowing this 'conveyer belt'. Historically, the Gulf Stream has shut down for periods. Great for skiing in the UK, but would take away all of our good pelagics. I personally think that the slowing of the GS is why we no longer get powerful inshore eddies that hit 20 fathoms....