Presumably most of you are aware of the volcanic eruption of Hunga Tonga a few months back. New research has shown that this volcano spewed an enormous amount of water vapor into the stratosphere.  See Here. Apparently, the amount of water equaled about 10% of what was already up there. Water vapor in the stratosphere is known to warm the troposphere so there are discussions that this could induce some short term global warming for a few years, the opposite of what typically happens with volcani