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短中时间尺度上的气温变化和太阳辐射之间的关系研究

, PP. 413-424

Keywords: 气候变化,多时间尺度的气温变化,太阳周期

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Abstract:

?探讨气温变化的时空特征及其产生原因越来越成为当代大气科学关注的焦点.过去的大多研究揭示了长时间尺度上的气候变化受太阳辐射的影响情况.本文采用经验模态分解的方法,通过识别气温和太阳黑子变化中的特征时间尺度,分析了短中时间尺度上南京市与石家庄市气温和太阳辐射之间的关系,得到了吻合以前实证结果的太阳黑子11a的准周期成分等,在气温变化中也找到了相似于太阳黑子5.5和11a的准周期成分,但是相关性分析及检验某一模态信号是否为随机信号的验证分析同时说明相似周期成分之间并不相关.在95%的置信度下,南京市和石家庄市气温变化中确实存在不少短周期波动,它们和太阳辐射之间并不存在直接的相关关系,而且南京市气温3.1a的中周期波动也吻合前人的研究成果.

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