Daniel Swain patiently explains SO2 unmasking, what was known, what was expected, and what's now on the research agenda. Here as sub-thread:
https://bsky.app/profile/weatherwest.bsky.social/post/3m4oagza3vc22
What I now understand:

Heating from less shipping 🚢SO2
of all GHG that were already in the atmo
has now been accomplished. ✅

Loss of clouds also adds more heating power to all further added GHG in the atmo (more than modelled for today's stage of our path to CO2-Zero).

But that's a tiny amount:
add heat ONCE to 3350 Gt vs add heat🌡️to new 40 Gt per year !

Not even 40Gt/yr because half of that annual CO2 emission amount still gets sucked up by ocean and land sink. Only 20Gt CO2 end up permanently the atmosphere for now.
So really not a lot of additional CO2 to "get heated" by the loss of SO2-clouds.
Compared to the one-time only heating of a hundred times more CO2, 3350 Gt = 430ppm.

Now I understand that there is NO reason why the sudden warming jump should become a new feature for the next decades as well.

Daniel amplifies that it is unfounded to extend the increased warming rate decades into the future
(like it's being done by Hansen, and very prominent on Social Media: by Leon Simons, see attached table.)

Daniel "admits" that the asynchronous reduction appears to have caused a greater forcing increase in some specific regions than the synchronous model calculations would suggest. https://bsky.app/profile/weatherwest.bsky.social/post/3m4oagzejin22

Urgent research is ongoing why that might be the case.

#climateChange #climateimpact #SO2 #atmosphere #IMO2020 #WarmingRate