Thought I'd post an update in case anyone found this interesting.

Why is it warmer than usual? A Twitter thread started by Ryan Maue says that the January '22 Hunga Tonga volcano (Hunga Tonga-Hunga Ha'apai submarine volcano) was originally estimated to have put 50 million metric tons of water into the stratosphere, but those estimates are now realized to have been low by a factor of 3x.

150 million metric tons of water, or 40 trillion gallons of water.
" target="_blank">Ryan Maue's Tweet

While Volcanic eruptions high in SO2 cause cooling, those high in water produce heating. Pinatubo's SO2 cooled the Earth for years, but Hunga Tonga had 2% of Pinatubo's SO2. They expect Hunga Tonga's water vapor to warm the Earth for seven years.

Lots more detail at EOS.

Originally found at:

https://wattsupwiththat.com/2023/07/23/ryan-maue-on-hunga-tonga-hunga-haapai-submarine-volcano