On Thursday, 26 September 2013 23:20:21 UTC+1, Adam Lea wrote:
On 26/09/13 17:08, Graham P Davis wrote:

On Thu, 26 Sep 2013 08:54:28 -0700 (PDT)

wrote:



Before I get blitzed with complaints (that’ll be the day) about why I

did this, I will freely admit that the logic behind doing this is

more than a little bit dodgy. I know nature doesn’t like straight

lines and that’s what linear regression give you, but the I thought

what the heck and just did it anyway.



Take a look at this and see if, in this case anyway, (a) nature might

have a point about straight lines and (b) you might make that forecast

date a little sooner. I'm still sticking with the forecast of 2020

that I made about eight(?) years ago.



http://arctic.atmos.uiuc.edu/cryosph....1900-2010.png







Is there any consensus as to what effect, if any, an ice free Arctic in

summer would have on the weather patterns (esp jet stream) in the

Northern Hemisphere?

It'll raise insurance premiums into the troposphere and there they will at last create the 'hot spot' the IPCC have been after for decades and of course give you a lovely bonus.