CAJ | 학술논문

热带季节内振荡和北极涛动的持续异常会对全球大气环流产生影响,同样会对东亚地区的旱涝造成影响。本文针对云南及周边地区近年来频繁出现的极端干旱事件进行了分析。发现当热带大气季节内振荡（MJO）和北极涛动（AO）两者持续异常时,会对云南的降水产生影响。2009/2010秋、冬、春3季连旱就是由MJO和AO出现极端异常（MJO异常不活跃;AO异常偏弱）造成的。2011年云南主汛期极端伏旱的产生则是由于MJO持续不活跃和西太平洋高压脊异常偏北造成的。
열대계절내진탕화북겁도동적지속이상회대전구대기배유산생영향,동양회대동아지구적한로조성영향。본문침대운남급주변지구근년래빈번출현적겁단간한사건진행료분석。발현당열대대기계절내진탕（MJO）화북겁도동（AO）량자지속이상시,회대운남적강수산생영향。2009/2010추、동、춘3계련한취시유MJO화AO출현겁단이상（MJO이상불활약;AO이상편약）조성적。2011년운남주신기겁단복한적산생칙시유우MJO지속불활약화서태평양고압척이상편북조성적。
The persistent anomalies of Madden-Julian Oscillation（MJO） and Arctic Oscillation（AO） not only have influences on global general circulation,but also have important implications for the drought and flood in eastern Asia.In this paper the frequent extreme drought events appeared in Yunnan Province and its surrounding areas in the past few years are analyzed.The results show that the precipitation in Yunnan would be affected while MJO and AO showed persistent anomalies.The three-season drought in autumn,winter and spring during the period of 2009-2010 was exactly caused by the extreme anomalies of MJO and AO（MJO was inactive while AO was unusually weak）.And the persistent inactivity of MJO and the abnormally northerly location of western Pacific subtropical highs were responsible for the extreme summer drought during main flood season in 2011 of Yunnan.