北太平洋海温分布与7月副高的遥相关分析

选取1952-2005年共54 a北太平洋月平均海表温度(SST)资料,奇异值分解结果表明,6月日界线附近西风漂流区的SST包含了北太平洋SST场的主要信息,西风漂流区与赤道冷水区的SST存在遥相关振荡,并且在6月振幅达全年最高值,11月其振幅出现次高值。分析结果表明,6月西风漂流区的SST可视为来年7月西太平洋副高强弱变化的信号:6月西风漂流区的SST偏低,则来年7月西太平洋副高偏强;反之,来年7月西太平洋副高偏弱。

Teleconnection Analysis of North Pacific Ocean Sea Surface Temperature and Subtropical High in July

It is shown from the singular value decomposition(SVD) results for 25 years of monthly mean sea surface temperature(SST) over the North Pacific Ocean during 1952 to 2005 that the SST of west wind drift area near the dateline contains the main information of the SST field of the North Pacific Ocean,there is a SST teleconnection oscillation between the west wind drift area and equatorial cold water area,and the amplitude of teleconnection oscillation in a year reaches the maximum in June and the secondary maximum in November.It is shown from the analysis results that the SST of the west wind drift area in June can be considered as the signal of the strength of subtropical high over the West Pacific Ocean in the next July,that is,the lower SST of the west wind drift area in June presages the stronger subtropical high over the West Pacific Ocean in the next July,whereas the higher SST of the west wind drift area in June presages the weaker subtropical high over the West Pacific Ocean in the next July.