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大气科学  2001 

近百年全球平均气温年际变率中的QBO长期变化特征

DOI: 10.3878/j.issn.1006-9895.2001.01.09

Keywords: 全球平均气温,奇异谱分析,奇异交叉谱分析,QBO年代际变化

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Abstract:

应用奇异谱分析(SSA)方法和奇异交叉谱分析(SCSA)方法,对全球及南北半球近100多年(1856~1997年)逐月地面气温距平序列中的准两年周期振荡(QBO)的长期演变特征进行诊断分析。结果表明:全球平均气温序列蕴含显著的QBO分量,它们与全球气候系统中其他各个子系统所隐含的QBO信号具有各种耦合对应关系,尤其突出地表现在Nino区海温和以SLP序列为代表的全球大气环流系统中QBO信号的耦合对应关系上。而平均气温的QBO的年代际特征及其变率的阶段性,不但表现在振幅上,而且其位相亦很明显。上述特征在全球、两半球具有明显的差异。

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