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Can a large volcanic eruption slow down global warming? Here’s what the latest IPCC report says -Preetha Banerjee

-Down to Earth 

Before the end of the century, there will be at least one large volcanic eruption, the scientists predict

Amid the grim predictions emerging from the latest report by the Intergovernmental Panel on Climate Change, there is a ray of hope: A major volcanic eruption can counteract anthropogenic global warming to a small extent. 

All statements about global warming breaching the 1.5 degree Celsius rise over pre-industrial levels assume that no major volcanic eruption occurs in the near term, the report said. 

Before the end of the century, there will be at least one large volcanic eruption, the scientists predicted based on their study of ancient climates and historical evidence. “Such an eruption will reduce global surface temperature for several years, decrease land precipitation, alter monsoon circulation and modify extreme precipitation, at both global and regional scales.” 

An increased number of volcanic eruptions resulted in a consistent slow cooling in the Northern Hemisphere from 1450 to 1850, the researchers observed. The cooling, however, showed regional variations, unlike the global warming that began immediately after. 

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