The equilibrium climate sensitivity... Based on multiple lines of evidence21, the very likely range of equilibrium climate sensitivity is between 2°C (high confidence) and 5°C (medium confidence). The AR6 assessed best estimate is 3°C with a likely range of 2.5°C to 4°C (high confidence), compared to 1.5°C to 4.5°C in AR5, which did not provide a best estimate.
Though to be fair to me I didn't notice anyone else blogging it (because I was asleep in summer? ATTP did, but quietly. Also - whippersnapper - noted that he'd been around at least since AR5. But Gavin didn't mention it in his six-of-the-best, even if he did elsewhere). I notice now because of PF's Twit. Of course, we've known that ECS is 3 oC for some time, but the narrower range is interesting.
Pic: globally warmed tomatoes still going in November despite our first frost. But they are quite sheltered.