That’s part of the story. From Pinatubo, there is believed to also be a warming effect due to the stratospheric SO2 absorbing heat from below (related to the c

That’s part of the story. From Pinatubo, there is believed to also be a warming effect due to the stratospheric SO2 absorbing heat from below (related to the claims of the article), and in a secondary effect, potentially changing atmospheric circulation. See point 6 in https://eos.org/articles/pinatubo-25-years-later-eight-ways-the-eruption-broke-ground https://eos.org/articles/pinatubo-25-years-later-eight-ways-... As with a lot of Earth science: it’s complicated.