H. E. Taylor wrote:
Greetings,
Assume the average global temperature rises 5C by 2050

Truck on down to the library and read Sun and Hansen
in the September 2003 Journal of Climate.

and the Arctic is ice free during the summer.
What will be the effect of an ice free Arctic on North American,
[& northern hemispheric] weather patterns?
What would be the effect on the circumpolar vortex?
What would be the effect on the jet stream?
Will the prevailing winds be shifted?

I have been asking myself these questions for a novel,
but I thought I would bounce them off you folks just
for the heck of it.

If you don't like the assumption, treat it as a thought exercise.
curious
-het