OT: But it’s probably a worthwhile read:
Ian MacDougall says
The atmosphere-hydrosphere-cryosphere-lithosphere totality is the most complex system we know about, anywhere in the entire Universe. So I say, forget temperatures. The Earth is a thermometer in its own right, whose ‘mercury’ is the level of the world’s one ocean, which is relentlessly rising at ~ 3.3 +/_ 0.4 mm/year, and accelerating.
The rest is high school physics. While there is any ice at the poles or on the high mountains, temperature rise will be insignificant. But after the ice is all gone, and the ocean has risen 70 metres, flooding every port city on the planet, get set for possible catastrophic temperature rise.
EXCEPT that the geosystem may find a new stability, with clouds of water vapour reflecting off enough incoming radiant heat to permanently darken if not blacken the skies as seen from the present sea level, making the Earth as seen from space far more like its sister planet Venus in appearance.
But though many life forms would terminate under these conditions, like unto a permanent and blackest violent worldwide thunderstorm of unimaginable scope and intensity, some would survive and even perhaps thrive. But I doubt that would include most members of our own species.
I do not know if William Kininmonth is a coal shill or not. But if it walks like a duck, and quacks like a duck, it could well be an ostrich pretending to be a duck. That is, a fully paid-up member of the Ostrich School of Climatology.
https://www.usgs.gov/faqs/how-would-sea-level-change-if-all-glaciers-melted#:~:text=There%20is%20still%20some%20uncertainty,coastal%20city%20on%20the%20planet.
https://sealevel.colorado.edu/