简介：TheanalysisoftherelationshipbetweenseaiceinArcticandAntarctic,andtheSouthernOscillationIndex(SOI)variationonthetemporalscaleofmonth,seasonandyearismadeinthispaper.ThenegativecorrelationbetweenseaiceinArcticandtheSOI.andthepositivecorrelationbetweenseaiceinAntarcticandtheSOIarefound.ThevariationofseaiceinAntarcticPacificseemstoplayanimportantroleintheinfluencetoatmosphere.Theirnonlinearrelationshipspresentmorestronglythanthelinearrelationshipbetweenthem.TherelationshipbetweenseaiceinArcticandAntarcticandtheSOIintheearlystageisinvestigated.Theirvariationshowsperiodicphenomena.ThemaximumcorrelationisusedtobuildthemodelforforecastingthevariationoftheSOIontheconditionoftheseaiceinArcticandAntarctic.Theexplainedvarianceofthesimulatedseriesisgreaterthan0.90.Thereexistsa17-monthperiodintherelationshipbetweenseaiceinArcticandAntarcticandSOI.Theexistingofthecommonfactorwithlargerscaleisdiscussedinthispaper.

简介：Temporalandspatialevolutioncharacteristicsofthe30-60dayoscillation(intraseasonaloscillation,ISO)ofsummerrainfallinChinaandtheeffectsofEastAsianmonsoonontherainfallISOareanalyzedinthispaper.Resultsshowthattheannualanddecadalvariationsoftheoscillationexistbetween1960and2008,andtheintensityisweakestinthelate1970sandearly1980s.InthetypicalstrongyearsoftherainfallISOobtainedfromempiricalorthogonalfunctions(EOFmode1),ananticycloneisinnorthwesternPacificandacycloneisintheeastofChina.Inthetypicalweakyears,thewindISOismuchweaker.Thelow-frequencyzonalwindandwatervaportransportfromthelowlatitudestomid-latitudesinthetypicalstrongyears,andtheoscillationstrengthofdiabaticheatingismuchstrongerthanthatintheweakyearsoftherainfallISO.TheanomalycharacteristicsoftherainfallISOshowanti-phasesbetweentheYangtzeRiverbasinandsouthofChina.AsforthetypicalstrongyearsoftherainfallISOintheYangtzeRiverbasin(EOFmode2),themainoscillationcenterofwatervaporisintheeastofChina(20-30°N,110-130°E).Inthepeak(break)phaseoftherainfalloscillation,alow-frequencycyclone(anticyclone)isintheYangtzeRiverbasinandananticyclone(cyclone)isnearTaiwanIsland.Inaddition,thepeakrainfallcorrespondstotheheatsourceintheYangtzeRiverbasinandtheheatsinkintheQinghai-TibetPlateau.AsforthetypicalstrongyearsoftherainfallISOinthesouthofChina,themainoscillationcenterofwatervaporissouthof20°N.Inthepeak(break)phaseoftherainfallISO,alow-frequencycyclone(anticyclone)isinthesouthofChinaandananticyclone(cyclone)isinthePhilippines.ThepeakrainfallcorrespondstotheheatsourceinthesouthofChinaandtheSouthChinaSea,andtheheatsinkinthewestofIndochina.

简介：Theatmosphericintraseasonaloscillation(ISO)anditsinterannualvariabilityaresimulatedbytheatmosphericgeneralcirculationmodel,whichwasdevelopedattheInstituteofAtmosphericPhysics.Twonumericalexperimentswereperformed,correspondingtotheAMIP-IandAMIP-IIsimulations,respectively.Themodelreasonablyreproducesthemajoraspectsoftheintraseasonaloscillation,includingthepropagatingpropertyandtheseasonaldifferencesinthetropics,thewavenumberstructureofISOintheglobe,andtheglobalcoincidenceintheinterannualvariationofISO.Comparisonoftheresultsbetweenthetwoexperimentssuggeststhatimprovementoftheboundaryforcingorconsideringtheair-seainteractionmayhelptoimprovethesimulationontheISOanditsinterannualvariability.

简介：Basedonmonthlyrainfalldatafrom80stationsofChinafortheperiodofJanuary1951—February1985analysedintermsofthemaximumentropyspectrumandEEOF(extendedempiricalorthogonalfunction)techniques,thespatialandtemporalfeaturesofquasi-biennialoscillation(QBO)intherainfallareinvestigatedinadetailedmanner,withsomeresultsofinterestacquired.HighlyevidentistheQBOinrainfalloverChina,especiallythemidandlowerreachesoftheChangjiangRiver,theNEsideoftheQinghai-XizangPlateau,NorthChina,thesouthernpartofNEChina,areassouthoftheChangjiangRiverandoftheNanlingmountainregion,andmostofXinjiang.ThespatialwavedescribedbythefirstandsecondeigenvectorsofEEOFforeasternChinaisatypeofwavetravellingfromNEtoSW,indicatingthecycleofpatterns(inthesouthtonorthdirection):dryness(D)-wetness(W)-dryness(D)→southernW-northernslightD→W-D-W→southernD-northernslightW→D-W-Dagain,withthefloodedregionbetweentheChangjiangandHuangheRiversfortheD-W-DoccurrenceandwiththeChangjiangRiverasthedivisionforthesouthernW-northernslightDhappening.Thethirdandfourtheigenvectorsshowastandingwave-likefeatureforthesameeasternpart,indicatingthecycleofD-W-D→transition→W-D-W→transition→D-W-D,again,wherethetransitionmeansthegeneralweakeningofdroughtandfloodingandtheirsubsequentreversaldevelopment.Theamplitudesofthetimecoefficientsofthefirsttwoeigenvectorsareoppositeinthetrendoftheirchangestothoseofthenexttwoandshowaperiodof10—14years.

简介：

简介：PhasecompositeanalysesareconductedtoinvestigatethepossibleeffectoftheMadden–Julianoscillation(MJO)onthespringrainfallanomaliesinEastChinabyusingtheReal-timeMultivariateMJO(RMM)indexfromAustralianMeteorologicalBureau.Theresultsshowthattherainfallanomaliesoverthemid-andlower-valleyofYangtzeRiverarepositivewhentheMJOshiftseastwardtothemid-andeastern-IndianOcean,andanomalousprecipitationoverSouthChinaarepositivewhentheMJOmovesfurthereastwardtothemaritimecontinent,whereasspringrainfallanomaliesoverEastChinaarenegativeintheotherMJOepisodes.TheMJOimpactsontheprecipitationoverEastChinaresultfromthechangesinlarge-scaleatmosphericcirculationaswellasvorticityandwatervaportransportationinthemid-andlower-troposphere.

简介：ThisstudyusesNCEP/NCARdailyreanalysisdata,NOAAoutgoinglong-waveradiation(OLR)data,thereal-timemultivariateMJO(RMM)indexfromtheAustralianBureauofMeteorologyandTibetanPlateauvortex(TPV)datafromtheChengduInstituteofPlateauMeteorologytodiscussmodulationoftheMadden-JulianOscillation(MJO)ontheTibetanPlateauVortex(TPV).Waveletandcompositeanalysisareused.ResultsshowthattheMJOplaysanimportantroleintheoccurrenceoftheTPVthatthenumberofTPVsgeneratedwithinanactiveperiodoftheMJOisthreetimesasmuchasthatduringaninactiveperiod.Inaddition,duringtheactiveperiod,thenumberoftheTPVsgeneratedinphases1and2islargerthanthatinphases3and7.Aftercompositingphases1and7separately,allmeteorologicalelementsinphase1areapparentlyconducivetothegenerationoftheTPV,whereasthoseinphase7aresomewhatconstrained.Withitseastwardpropagationprocess,theMJOconvectioncentrespreadseastward,andtheverticalcirculationwithinthetropicalatmospherechanges.Duetotheinteractionbetweenthemid-latitudeandlow-latitudeatmosphere,changesoccurinthebarocliniccharacteristicsoftheatmosphere,theavailablepotentialenergyandeddyavailablepotentialenergyoftheatmosphere,andthecirculationstructuresoftheatmosphereovertheTibetanPlateau(TP)andsurroundingareas.Thisresultsinsignificantlydifferentwatervapourtransportationandlatentheatdistribution.Advantageousanddisadvantageousconditionsthereforealternate,leadingtoasignificantdifferenceamongthenumbersofplateauvortexindifferentphases.

简介：IthaslongbeenacknowledgedthattherearetwotypesofElNioevents,i.e.,theeasternPacificElNio(EE)andthecentralPacificElNio(CE),accordingtotheinitialpositionoftheanomalouswarmwateranditspropagationdirection.Inthispaper,theoceanicandatmosphericevolutionsandthepossiblemechanismsofthetwotypesofElNioeventswereexamined.ItisfoundthatalltheElNioevents,CEorEE,couldbeattributedtothejointimpactsoftheeastwardadvectionofwarmwaterfromthewesternPacificwarmpool(WPWP)andthelocalwarmingintheequatorialeasternPacific.BeforetheoccurrenceofCEevents,WPWPhadlongbeeninastateofbeinganomalouswarm,sothestrengthofeastwardadvectionofwarmwaterwasmuchstrongerthanthatofEE,whichplayedamajorroleintheformationofCE.WhilefortheEEevents,mostcontributioncamefromthelocalwarmingoftheequatorialeasternPacific.ItisfurtheridentifiedthattheimmediatecauseleadingtothedifferenceofthetwotypesofElNioeventswastheasynchronousvariationsoftheSouthernOscillation(SO)andtheNorthernOscillation(NO)asdefinedbyChenin1984.WhenthetransitionfromthepositivephaseoftheNO(NO+)toNO-waspriortothatfromSO+toSO-,therewouldbeeastwardpropagationofwesterlyanomaliesfromthetropicalwesternPacificinducedbyNOandhencethegrowthofwarmseasurfacetemperatureanomaliesinWPWPanditseastwardpropagation.ThiswasfollowedbylaggedSO-inducedweakeningofsoutheasttradewindsandlocalwarmingintheequatorialeasternPacific.ThesewereconducivetotheoccurrenceoftheCE.Onthecontrary,thetransitionfromSO+toSO-leadingthetransitionofNOwouldfavortheoccurrenceofEEtypeevents.

简介：我们调查了之间的差别同温层(S类型)并且在intraseasonal时间的tropospheric(T类型)北极摆动(AO)事件可伸缩，以他们对表面空气温度的影响(坐)在北半球和与他们的空间结构联系的动态特征上。S类型AO事件证明一个平流层对流层联合了结构，当T类型事件展出了一个平流层对流层时解开的结构。在北半球上的环形的容纳的异例被发现与S类型AO事件被联系，而如此的一个环形的特征是实质地在T类型AO事件的destructed。在二种类型的对流层的不同水平结构能主要被归因于强迫的短暂旋涡反馈。至于Ttype事件的垂直地解开的结构，把他们区分开来与S类型事件的内在的动态特征在地带地限制的Rossby波浪的垂直繁殖躺着。在T类型事件，在一垂直波导存在的地方，地带地限制的Rossby波浪包能在东北亚洲上从重要高度异例发出，然后向上宣传进平流层。相反，如此的垂直繁殖不为S类型事件是明显的。在T类型事件从对流层与地带地限制的Rossby波浪的向上的注射联系的同温层的异例能进一步通过在climatological想PW和异常PW之间的干扰导致行星的波浪(PW)的异常垂直繁殖，导致最后的平流层对流层T类型事件的解开的结构。

简介：Basedonresearchesmadebytheauthorinrecentyears,discussionismadeofthequasi-40-dayoscillation(QDO)natureanditscharacteristicpropagation,withemphasisontheSouthernHemispheremill-latitudequasi-periodiccoldairforcingonthetropicalatmospherequasi-40-dayoscillationalongwithitseffectupontheNorthernHemispheresummermonsoon.Itisproposedthattheinteractionbetween,orlateralcouplingof,meridionalcirculationsystemsmayserveasthemechanismoftheoscillationpropagationinameridionaldirection.

简介：

简介：在在灰尘天气的半球和它的可能的角色的低频率摆动在2002在诺思中国上袭击事件作为案例研究被分析。结果证明阿留申群岛之土人Low在3060天的摆动上在南半球与环极涡旋被连接，与趋于加深可能对尘暴事件的产生有用的阿留申群岛之土人Low的弱环极涡旋。在这后面的可能的机制是吝啬的经向环流的内部半球的相互作用，与在东亚上的主要可变性。在在上面的水平对流层的南半球的高纬度的带的吝啬的偏午可以带北半球的，它然后在北半球影响地方性环流。因此，低频率摆动电视连接是在在诺思中国上在南半球发行量和灰尘事件之间联合的一个可能的连接。然而，内部低频率摆动的年变化是不清楚的。

简介：Basedonobservationsandreanalysisdata,thecharacteristicsoftheevolutionofclimatologicalspringprecipitationoverSouthernChina(SPSC)andtheassociatedclimatologicalintraseasonaloscillation(CISO)andatmosphericcirculationarestudied.ResultsshowthatSPSCincreasesinanoscillatoryway.AlthoughtheevolutionofSPSCissimilarindifferentregions,therearealsodifferences.IndifferentregionsofSouthernChina,theonsetdatesoftherainseasonarefromthe12thto24thpentadandthepeakdatesareafterthe20thpentad.CISOisanimportantcomponentofSPSC,whichisnotonlystatisticallysignificant,butalsoaccompaniesadynamicallycoherentstructure.Thepeakwet/dryphaseofeachCISOcyclecorrespondstoasignificantrainfallincreasing/decreasingperiodandmodulatestheevolutionofSPSC.TherainfallgrowthinthesecondhalfofMarchandmid-Aprilistheresultofthemodulation.Thewet/dryphaseofCISOisaccompaniedbylow-levelconvergent(upper-leveldivergent)andcyclonic(anti-cyclonic)circulation,whichfavorsascendingmotiontodevelopoverSouthernChina.

简介：动态、数字的方法被用来热强迫讨论大气的反应到SST。结果表演为行星的规模系统，热强迫能快速激动的站的SST稳定的大气的平衡状态回答，它被明显的大规模电视连接摆动在东方西方和南方北方方向描绘。为摘要的规模系统，SST热强迫主要使大气的低频率的摆动激动。在SST之间的某基本关系和动态过程热强迫和大气的反应模式被揭示，一些新观点被介绍。

简介：Byusingtheupper-winddatafromJuly1980toJune1983,thevariationsofthelow-frequencyoscillation(LFO)intheatmospherebeforeandduring1982ElNinohavebeeninvestigated.BeforetheElNino,theLFOpropagatesfromwesttoeastovertheequatoroftheEasternHemisphereandfromeasttowestover20°N.TheeastwardpropagatingLFOovertheequatorconsistsofzonalwavenumber1propagatingeastwardandzonalwavenumber2withacharacterofstationarywave.Theoscillationofzonalwavenumber2canmodulatetheoscillationstrength.AftertheonsetoftheElNino,thepropagatingdirectionsoftheLFOovertheequatorand20°NoftheEasternHemispherechangetobewestwardandeastward,respectively.TheLFOoverthewesternPacificweakensrapidlyandonecomingfrommiddleandhighlatitudespropagatestotheequator.Fromthephasecompositionsofstreamlinefieldsforthezonalwavenumber1ofequatorialwestwardpropa-gatirgLFO,itisfoundthattheatmosphericheatsourceintheequatoroftheeasternPacific(EEP)excitesaseriesoftheequatorialcyclonesandanticycloneswhichmovenorthwardandwestwardandformthewestwardpropagatingLFOovertheequator.Withthewavelengthof20000km,thiskindofequatorialwaveissimilartothemixingRossby-gravitywave.Initswestwardandnorthwardmovement,thecirculationinEastAsiaismodified.ThismaybethemechanismoftheinfluenceofElNinoontheclimateofChina.

简介：TheworkisageneralsurveyusingSSTAdataoftheIndianOceanandofprecipitationat160Chineseweatherstationsover1951～1997(47years).ItrevealsthatthedipoleoscillationofSST,especiallythedipoleindexofMarch～May,intheeasternandwesternpartsoftheoceancorrelateswellwiththeprecipitationduringtheJune～AugustrainingseasoninChina.Asshowninanalysisof500-hPaNorthernHemispheregeopotentialheightheightbyNCEPfor1958～1995,theIndianOceandipoleindex(IODI)iscloselyrelatedwithgeopotentialheightanomaliesinthemiddle-andhigher-latitudesintheEurasianregion.AsanegativephaseyearofIODIcorrespondstosignificantPacific-Japan(PJ)wavetrain,itishighlylikelythattheSSTforthedipolemayaffecttheprecipitationinChinathroughthewavetrain.Additionally,correlationanalysisoflinksbetweenSSTdipoleindexoftheIndianOceanregionandairtemperatureinChinaalsoshowsgoodcorrelationbetweentheformerandwintertimetemperatureinsouthernChina.

简介：Diagnosticstudieshavebeendoneoftheseasonalandinterdecadalvariationsofthecouplingpatternsfortheair-seainteractionsinthenorthernpacificregion.byusing500-hpageotentialhightfieldoftheNorthernHemisphereandmonthlymeanSSTfieldofnorthernPacificOcean(1951～1995)andwiththeaidoftheSingularValueDecomposition(SVD)technique.Theresultsshowthat:(1)ThedistributionpatternsofSVD,whichlinkwiththeE1Nino(orLaNina)events,areimportantintheinteractionbetweentheatmosphereandoceanwhiletheatmosphere,couplingwithit,varieslikethePNAteleconnectiondoes.Thecouplingofairseainteractionsisthehighestinthewinter(January),specificallylinkingtheE1NinoeventwiththePNApatterninthegeopotentialheightfield.Ofthefourseasons,summerhasthepoorestcouplingwhenthe500-hPageopotentialheightfieldcorrespondingtotheLaninaeventdisplayspatternssimilartotheEastAsian-Pacificone(PJ).Thespringandautumnarebothtransitionalandthecouplingislessthghtintheautumnthaninthespring.(2)Significantchangeshavetakenplacearound1976inthepatternofair-seacoupling,withtheyear'swinterhavingintensifiedPNApatternof500-hPawintergeopotentialheightfield,deepenedAleutianlowthatmovessoutheastandthesummerfollowingithavingoutstandingPJpatternof500-hPageopotentialheightfield,whichisnotsobefore1976.

简介：北方大西洋摆动(NAO)是在北半球的气候可变性的领先的模式之一。它清楚地在气象学的变量联系到变化，这被显示出，例如地面温度，在半球的规模。然而，最近的研究表明了NAO空间模式也取决于太阳的强迫。因此，它气象学的变量上的效果必须变化取决于这个因素。而且，它能是阳光通过可变性模式影响气候，是这研究的焦点的一个假设。我们发现在NAO/AO和半球的温度之间的关系变化取决于太阳活动。结果看积极重要关联太阳活动是否仅仅高。另外，结果支持那项太阳活动影响对流的想法在经由同温层的极的旋涡的变化的北半球的球的气候变化。

简介：

简介：EarlystudiessuggestedthattheAleutian-Icelandiclowseesaw（AIS）featuresmultidecadalvariation.Inthisstudy,themultidecadalmodulationoftheAISandassociatedsurfaceclimatebytheAtlanticMultidecadalOscillation（AMO）duringlatewinter（February-March）isexploredwithobservationaldata.Itisshownthat,inthecoldphaseoftheAMO（AMOI-）,aclearAISisestablished,whilethisisnotthecaseinthewarmphaseoftheAMO（AMO[＋）.ThesurfaceclimateoverEurasiaissignificantlyinfluencedbytheAMO＇smodulationoftheAleutianlow（AL）.Forexample,theweakALinAMOI-displayswarmersurfacetemperaturesovertheentireFarEastandalongtheRussianArcticcoastandintoNorthernEurope,butonlyovertheRussianFarEastinAMO{＋.Similarly,precipitationdecreasesovercentralEuropewiththeweakALinAMOI-,butdecreasesovernorthernEuropeandincreasesoversouthernEuropeinAMOI＋.