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Mt. Redoubt Eruptions – What Effect If Any on the Summer? Winter? April 6, 2009

Posted by honestclimate in Discussions.
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Mt. Redoubt Eruptions – What Effect If Any on the Summer? Winter?

By Joe D’Aleo CCM ICECAP
Monday, April 6, 2009

Starting on March 22, a series of major eruptions have taken place from Mt. Redoubt in Alaska. The biggest exceeded 65,000 feet in height. More than a dozen eruptions as high as 60,000 have followed the first week alone. Activity may continue for weeks or months based on the volcano’s history.

Mt. Redoubt March 26, 2009

Climatologists may disagree on how much the recent global warming is natural or manmade but there is general agreement that volcanism constitutes a wildcard in climate, producing significant global scale cooling for at least a few years following a major eruption. However, there are some interesting seasonal and regional variations of the effects.

Oman et al (2005) and others have shown that though major volcanic eruptions seem to have their greatest cooling effect in the summer months, the location of the volcano determines whether the winters are colder or warmer over large parts of North America and Eurasia.

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