The vast boreal forests bordering the tundra are already lush and green. If they were to advance northward it would be a beneficial development for the environment as a whole. Too bad it is highly unlikely to happen. This ridiculous screed is, as usual, based on a “computer” model, custom made to deliver the desired outcome. It is not based on any data at all.
I was kind of under the impression that the tundra was made up of tons of dead plant matter (kind of like a frozen bog). If it is bad and unprecedented, then how did all of that plant matter get there in the first place?
That is correct. More likely the increase in open water (caused by ocean warmth, not air warmth) will result in increased snowfall which will not melt but instead push the forests further south.