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Depends on the size of the event. Mt. St. Helens was considered a fairly small eruption and had very little effect on global climate. Mt. Toba super volcano was so massive it nearly wiped out our Human ancestors due to the shear volume of ejecta!! It took the earth decades to find its equilibrium.

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Can ash cause global temperatures to rise?

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Why do volcanic eruptions affect the temprature?

The volcanic eruptions affect the temperature due to the ash cloud it injects into the atmosphere. The ash cloud insulates the earth, preventing some of the warm of the sun from being absorb by the earth. This results in cooler temperatures in the affected areas.


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