Why do sun spots increase temperatures on Earth?

22 April 2011

Question

Hi, Paul from Surrey.

I read recently that Sun Spots are the coldest part of the sun and every 11 years they reach their maximum in number. However this is accompanied by warmer temperatures on the Earth.  When Sun Spots are less in number then the Earth is colder.

My question is if Sun Spots are cold parts of the sun then why does having more of them increase temperatures on the Earth?

Thanks for your help,

Paul

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