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Climate and the solar cycle 气候与太阳周期 Chilling out in the winter sun 冬日下的冷噤 Stratospheric changes can lead to nasty cold snaps 平流层变化引起讨厌的严寒 THOSE unconvinced-and those seeking to unconvince others-of the reality of man-madeglobal warming often point to the changeable behaviour of the sun as an alternativehypothesis. 那些自己不信和那些游说他人不要相信人类活动导致全球变暖的人，常常将其归咎于太阳活动多变。 A new study showing how the severity of winters in Europe, and warming in the Arctic, mightbe linked to changes in solar activity might seem to add to this case. 一项新的研究似乎为此提供了新证据：该研究显示欧洲冬日的严寒以及北极地区的温暖也许真与太阳活动有关。 In itself, it does not, for the heat in question is being redistributed, notretained. 就研究本身而言，它并不能提供新的证据，因为所提到的热能是被重新分配而不是滞留固定的。 But it does point to two other lessons about climate change: that hard data on the factorswhich affect it are sometimes difficult to come by; 但它的确指出了关于气候变化的另外两个问题：一是有时候很难获得影响气候变化的因素的切实数据; | 
