Originally Posted by
dixi188
Did the 1980 Mt St Helens eruption cause any global cooling?.
"While the Mount St. Helens eruption had lowered global average temperatures by roughly 0.1 degrees Celsius, the much smaller amount of ash from El Chichon cooled the globe three to five times as much.
Data from NASA’s Total Ozone Mapping Spectrometer (TOMS), which had been launched in 1978, showed that sulfur aerosols probably were the culprit. TOMS, which measures other atmospheric gases as well as ozone, showed that El Chichon produced 40 times as much sulfur dioxide as Mount St. Helens.
In addition, while a volcano’s ash falls out of the stratosphere within days or at most weeks, the veil of sulfuric acid takes months to precipitate out. It has more time to affect climate."
https://www.washingtonpost.com/news/...hout-a-summer/