There's been speculation that the heart of the winter will shift. That instead of a cold arctic surrounded by permanent westerly winds the winds will shift so the coldest area is somewhere in North America during the northern winter.

That's just speculation at this point. We're entering unknown territory.

Or what can we do to offset the albedo effects of decreasing ice cover? Low primary productivity areas like those that were formerly permanently covered in ice or deserts seem like good places for artificial light reflection.