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Question
How likely is the eruption of the volcano in Iceland in 2010 the cause for the mild winter last year and this year in the great lakes area (as well as other places), and a cold and snowy winter in Europe?

Answer
Hi Caleb

Eruptions of volcanoes typically cause cooling due to the debris that is injected into the upper atmosphere thus leading to reducing the amount of sunlight coming through the atmosphere.
CO2 is also given off which does affect global warming but on a longer time scale and through planet wide distribution.

http://www.theatlantic.com/technology/archive/2010/04/could-icelands-volcano-slo  

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Donald Rosenfeld

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Any questions (except private) answered from the 1st grade level on up pertaining to any aspect of Weather. I am a 20 year member of the American Meteorological society and a long time forecaster of eastern United States snow storms and Hurricanes.

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