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Sunspot activity is correlated with the total amount of energy we receive from the sun.

太阳黑子的活动性与我们从太阳那获得的总能量密切相关。

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Sunspot activity, which follows an 11-year cycle, is due to peak in 2013 after which it will start to wane slightly.

虽然以11年为周期的太阳黑子活动将在2013年达到顶峰之后，将缓慢衰落。

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This is predicted due to important modulating cloud-forming influences of cosmic rays throughout periods of reduced sunspot activity.

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That was followed by the Dalton Minimum from 1790 to 1830, another period of well below normal sunspot activity.

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Solar scientists have been waiting since December 2008 for signs that sunspot activity is picking up but so far without success.

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