冬季北太平洋涛动和我国夏季降水

The relationship between the summer rainfall in China and the northern Pacific oscillation in winter

本文分析了冬季北太平洋涛动与我国夏季降水的关系。结果表明,当冬季北太平洋涛动偏强时,我国夏季主要多雨带位于黄河流域及其以北地区(即1类雨型);当冬季北太平洋涛动偏弱时,夏季主要多雨带位于黄河与长江之间,中心在淮河流域一带(即2类雨型)。据此建立了我国夏季1、2类雨型的预报判据。并进一步分析了北太平洋涛动遥相关型从冬到夏的演变过程及其对北太平洋地区海温异常的响应。

In the paper, the relationship between the summer rainfall in China and the intensity of the northern Pacific oscillation (NPO) in winter is analysed. The results indicate that, the major rain belt is located in or north to the Yellow River Valley in summer(Rainfall pattern 1) when NPO is stronger than normal in winter, while the major rain belt occurs between the. Yellow River and the Changjiang River in summer (Rainfall pattern 2) when NPO is weaker than normal in winter. Besides, the change of NPO from winter to summer and its response to SST anomalies in the northern Pacific are also studied.