Eruptions create sulfuric acid clouds in the upper atmosphere and can cool the climate Volcanic eruptions contributed to the collapse of dynasties in China in the last 2,000 years by temporarily cooling the climate and affecting agriculture, according to a Rutgers co-authored study. Large eruptions create a cloud that blocks some sunlight for a year or two. That reduces warming of the land in Asia in the summer and leads to a weaker monsoon and less rainfall, reducing crop harvests. The 1991 eruption of Mount Pinatubo in the Philippines temporarily cooled the global climate. The June 12 eruption (shown here) was followed by a larger one three days later. Many eruptions in various places were larger during imperial China. “We confirmed for the first time that collapses of dynas...
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