If you haven’t looked into what’s happening on the East Siberian Arctic Shelf, then sober up and do some research. Startling. We’re barreling toward 4 degrees of warming.
I haven't. I believe the Russians are using the Arctic sea for commercial shipping already, but I'll check it out. The Arctic sea ice has never been all that thick, nothing like the Antarctic where besides the latitude there is substantial elevation. We are near the usual, so far as estimates of interglacial warm maximum temps seem to be for past cycles. I think the interglacial warm periods are part of a cycle that is self-limiting. We no longer have anything near the CO2 levels that in past geologic ages kept the poles warm enough to be cold rain forests. At .04 % yp 0.10 % CO2 we will still be locked in the Ice Age cycles. Look at the oceanic thermoclines. When the icepack is gone and the supply of fresh 4C water "dries up", the warm period comes to a quick end because of the rapid onset of polar precipitation, which with warm oceans to supply the precipitation will rapidly restore the ice shelves and close the polar sea once again.
It is believed by many that the fresh water from Arctic icemelt and the many rivers that flow into the Arctic sea, with the relatively restdricted mixing channels of the Bering and North Sea, drives our El Nino/La Nina weather patterns. The vertical saline mixing currents determine surface sea temps. But with deep sea warming we will have profound climate change. You know, a new ice age. It's counter-intuitive, but the fact is Ice Age onset needs warm oceans to supply the polar snowfall. Cold Oceans mean Arctic and Antarctic "desert" climates which just don't get enough winter snowfall to keep up with summer melting.