A Statistical Comparison of the Westerly Wind Bursts between the Positive and Negative Phases of the PDO  

作　　者：Yunhao SHI Jingzhi SU 

机构地区：[1]Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081 [2]University of Chinese Academy of Sciences,Beijing 100049

出　　处：《Journal of Meteorological Research》2020年第2期315-324,共10页气象学报（英文版）

基　　金：Supported by the National Key Research and Development Program of China(2016YFA0600602);National Natural Science Foundation of China(41776039)。

摘　　要：To understand the diversity of the El Ni?o–Southern Oscillation(ENSO)under the background of Pacific decadal oscillation(PDO)during recent decades,characteristics of westerly wind bursts(WWBs)during positive and negative phases of the PDO were analyzed.It is shown that,during the ENSO developing period,the El Ni?o evolution may be affected by stronger or more frequent WWBs in the positive PDO phase than in the negative PDO phase.The sustained effects of atmospheric dynamics on the equatorial ocean can be indicated by the accumulated WWB strength,which contains most WWB characteristics,including the accumulated days,occurrence frequency,strength,and spatial range of WWBs.The synoptic/climate systems that are directly related to WWBs show a wider spatial distribution in the positive PDO phase than in the negative PDO phase.

关 键 词：WESTERLY wind bursts(WWBs) WWB strength WWB accumulated day Pacific decadal oscillation(PDO) El Nino-Southern Oscillation(ENSO) 

分 类 号：P43[天文地球—大气科学及气象学] P425