对西太平洋副高脊加强、西伸的初步分析

A PRELIMINARY ANALYSIS OF THE REINFORCEMENT AND WESTWARD EXTENSION OF SUBTROPICAL RIDGE IN THE WESTERN PACIFIC OCEAN

本文主要利用1973年以来,全球热带历年逐月各标准等压面月平均风场(ECMWF,KWBC),OLR(CAC)资料及西太平洋副高各种指数(国家气象局),分析了热带风场变异对印度洋-西太平洋反沃克环流、赤道西风、越赤道气流的影响,及其对西太平洋副高脊加强、西伸的影响过程。

In this paper, by using data on monthly mean meridional and zonal windfields of global tropical ocean from 1973 to 1989 (ECMF, KWBC), OLR (CAC), and various subtropical characteristic indexes of the western Pacific Ocean, the influence of the wind field variations in the global tropical ocean on anti-Walker circulation between the Indian Ocean and the western Pacific Ocean, equatorial westerly and air current across the equator is studied, and the physical mechanism of their influence on subtropical ridge reinforcement and westward extension is discussed as well.