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本文通过统计学相关分析,讨论了西太平洋低纬地区经圈环流强度、西北太平洋副热带高压的长期变化与赤道太平洋东部海温场、热带太平洋西部—南海海温场之间的耦合关系。 结果表明,赤道太平洋东部海温异常是西太平洋低纬地区经圈环流强度长期变化的主要原因之一。赤道太平洋东部海温的异常,通过西太平洋低纬地区经圈环流强度的异常响应,影响西北太平洋500hPa副高以及南海海温的长期变化。很有可能,东北太平洋中高纬度西风带西风强度与赤道海温的遥相关,是通过西太平洋低纬地区哈特莱环流向北的角动量和热量输送而实现的。
In this paper, the relationship between the strength of the circulation in the western Pacific low latitude region, the long-term variation of the Northwest Pacific subtropical high and the SST field in the eastern equatorial Pacific and the SSTA in the western tropical Pacific Ocean are discussed. The results show that the anomalous SST anomalies in the eastern equatorial Pacific are one of the main causes of long-term changes in the strength of the meridional circulation in the western Pacific low latitudes. The anomalies of SST in the eastern equatorial Pacific affect the long-term changes of the 500 hPa subtropical high in the western North Pacific and the SST in the South China Sea through the abnormal responses of the meridional circulation intensity in the western Pacific low latitudes. It is likely that the teleconnection of the westerly intensity over the northeastern Pacific mid-high latitudes with the equatorial sea surface temperature is achieved through the angular momentum and heat transfer northward from the Hartley circulation in the western Pacific low latitudes.