简介：Interannualvariabilityoflandfallingtropicalcyclones(TCs)inChinaduring1960-2010isinvestigated.Byusingthemethodofpartialleastsquaresregression(PLS-regression),canonicalENSOandENSOModokiareidentifiedtobethefactorsthatcontributetotheinterannualvariabilityoflandfallingTCs.ElNioModokiyearsareassociatedwithagreater-than-averagefrequencyoflandfallingTCsinChina,butreversedincanonicalElNioyears.SignificantdifferenceingenesislocationsoflandfallingTCsinChinaforthetwokindsofElNiophasesoccursdominantlyinthenortherntropicalwesternNorthPacific(WNP).Thepatternsoflow-levelcirculationanomaliesandoutgoinglongwaveradiation(OLR)anomaliesassociatedwithlandfallingTCgenesiswithdifferenttypesofElNiophasesareexamined.DuringcanonicalElNioyears,abroadzonalbandofpositiveOLRanomaliesdominatesthetropicalWNP,whilethecirculationanomaliesexhibitameridionallysymmetricaldipolepatternwithananticyclonicanomalyinthesubtropicsandacyclonicanomalynearthetropics.InElNioModokiyears,avastregionofnegativeOLRanomalies,roughlytothesouthof25°Nwithastronglarge-scalecyclonicanomalyoverthetropicalWNP,providesamorefavorableconditionforlandfallingTCgenesiscomparedtoitscounterpartduringcanonicalElNioyears.FormorelandfallingTCsformedinthenortherntropicalWNPinElNioModokiyears,therearemoreTCsmakinglandfallonthenortherncoastofChinainElNioModokiyearsthanincanonicalElNioyears.ThenumberoflandfallingTCsisslightlyabovenormalincanonicalLaNiayears.EnhancedconvectionisfoundintheSouthChinaSea(SCS)andthewestofthetropicalWNP,whichresultsinlandfallingTCsformingmorewestwardincanonicalLaNiayears.DuringLaNiaModokiyears,thelandfallingTCfrequencyarebelownormal,owingtoanunfavorableconditionforTCgenesispersistinginabroadzonalbandfrom5°Nto25°N.SincethewesternNorthPacificsubtropicalhi

简介：ElNi的影响?在热带太平洋上的对流地联合的凯尔文波浪上的o南部的摆动(ENSO)被在东方太平洋(EP)ElNi比较绝对温标波浪活动调查?o，中央太平洋(CP)ElNi?o，并且LaNi?一年，分别地到30年(19822011)意味着统计。在这研究的对流地联合的凯尔文波浪被过滤的225天的通带的实验直角的功能(文件结束)的二个领先的模式代表每天出去的longwave放射(OLR)与3或4的估计的带的wavenumber，8天的时期，并且东方宣传17ms1的速度。在绝对温标波浪活动的ENSO的最重要的影响在EPElNi期间是绝对温标波浪的增强?os。LaNi的影响?一上绝对温标波浪紧张的减小相对更弱，反映热带深传送对流和联系凯尔文的非线性响应ENSO海表面温度(SST)飘动异例。CPElNi的影响?绝对温标波浪上的o由于相对更弱的SST异例和更小的空间范围是不太重要的。ENSO可以也改变绝对温标波浪的频率，波长，和阶段速度。这研究证明低频率的ENSOSST异例调制高周波的热带骚乱，天气气候连接的一个例子。

简介：ElNinoModoki是近年发现的赤道太平洋海温异常分布的新特征,主要表现为热带太平洋海温异常为纬向＂三极型＂分布,与传统的ElNino的＂偶极型＂分布显著不同。本文利用1979～2010年冬季降水观测资料以及NCEP/NCAR再分析月平均资料,分析了ElNino和ElNinoModoki对我国华南地区冬季降水的不同影响。结果表明,ElNino年冬季,西太平洋副热带高压偏强偏南,我国华南地区受其西侧异常西南风影响,获得充足的水汽供应。另外,高层抽吸作用增强,上升运动加强,对流发展,降水偏多;而ElNinoModoki年冬季,西太平洋副热带高压位置偏北,我国华南地区受高压脊控制。华南地区高层抽吸作用减弱,上升运动减弱,对流减弱,并且水汽供应不足,导致降水偏少。