近百年全球平均气温年际变率中的QBO长期变化特征

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。

Quasi-Biennial Oscillation Variability in Interannual Variance ofthe Global Surface Temperature during the Last 100-Year Period

The singular spectrum analysis (SSA) and the singular cross-spectrum analysis (SCSA) are applied to the global, Southern and Northern Hemisphere surface temperature during 1856-1997. The results show that a striking quasi-biennial oscillations are found. And there are different coupled-oscillations between the quasi-biennial periods of the global surface temperature and the other climatic subsystem members, specifically SST over Nino oceanic regions and the sea-surface pressure seris which represents the global atmospheric circulation subsystem. The quasi-biennial oscillation amplitude as well as its phase of the global average temperature has interdecadal variability and varies with various stage. The above-mentioned features are different obviously between the global temperature, the Southern Hemispheric temperature and the Northern Hemispheric temperature.