Scientists have found global precipitation significantly decreased in the year following large volcanic eruptions, as evidenced by paleoclimate reconstructions and historical observations. Decreased precipitation is a robust post-volcano eruption signal in the monsoon climate, and scientists want to explore volcanos' roles in future climate. However, major volcanic eruptions are generally not included in current model projection scenarios because they are inherently unpredictable events.
source https://phys.org/news/2021-03-scientists-potential-volcanic-impacts-future.html
