Considering that the stratosphere is part of the atmosphere, that's both pedantic and incorrect.
> We know a lot about it because volcanoes do this occasionally. Temperatures cool down for about 2 years, which is how long it takes for the S02 to break down.
Volcano's don't pump pure SO2. Yes, the science may be entirely valid, and it's not for me decide, but I think it warrants heavy consideration before we try to solve problems we're creating due to adding excess by adding additional excess.
NASA report on the Mount Pinatubo caused global cooling: https://earthobservatory.nasa.gov/images/1510/global-effects...
Doesn't SO2 sink in air? Because we'll need to be constantly adding it to the atmosphere aren't we going to end up with acid rain as it falls to the ground?
Either way, if acid rain is the price for controlling global warming, I think that is a very desirable trade-off!