简介：ＴＨＥＳＴＵＤＹＯＦＰＹＲＯＴＥＣＨＮＩＣＦＬＡＲＥＳＺｈａｎｇＪｉｈｕａｉ（张纪淮）ａｎｄＭａＰｅｉｍｉｎ（马培民）ＩｎｓｔｉｔｕｔｅｏｆＷｅａｔｈｅｒＭｏｄｉｆｉｃａｔｉｏｎＡＢＳＴＲＡＣＴＩｎｏｒｄｅｒｔｏｉｒｎｐｒｏｖｅｔｈｅｏｐｅｒａｔｉｏ...

简介：ＡＤＶＡＮＣＥＳＩＮＳＴＵＤＹＯＦＩＮＴＥＲＡＣＴＩＯＮＳＡＳＳＯＣＩＡＴＥＤＷＩＴＨＲＡＩＮＳＴＯＲＭ￥ＭａＳｎｕｆｅｎ（马淑芬）（ＩｎｓｔｉｔｕｔｅｏｆＳｙｎｏｐｔｉｃａｎｄＤｙｎａｍｉｃＭｅｔｅｏｒｏｌｏｇｙ）Ｂｅｉｊｉｎｇ１０００８１ａｎｄＤ...

简介：肖庆农，伍荣生ＡＳｔｕｄｙｏｎＦｒｏｎｔａｌＭｏｔｉｏｎｏｖｅｒＯｒｏｇｒａｐｈｙ￥ＸｉａｏＱｉｎｇｎｏｎｓａｎｄＷｕＲｏｎｇｓｈｅｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｔｍｏｓｐｈｅｒｉｃＳｃｉｅｎｃｅｓ，ＮａｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙ，Ｎａｍｉｎｇ...

简介：Fortheconservativeandnon-conservativeschemesofnonlinearevolutionequations,bytakingthetwo-dimensionalshallowwaterwaveequationsasanexample,acomparativeanalysisoncomputationalstabilityiscarriedout.Therelationshipbetweenthenonlinearcomputationalstability,thestructureofthedifferenceschemes,andtheformofinitialvaluesisalsodiscussed.

简介：OnthebasisofgradientdataofthesurfacelayerobtainedfromfoursetsofAutomaticWeatherStation(AWS)installedinLhasa,Nagqu,XigazeandNyingchiontheTibetanPlateaufromJuly1993toMarch1999accordingtotheprojectofPRC-JapanAsiamonsoonmechanismcooperativeresearch,theseasonalsurfaceroughnesslengthsanddiurnalbulktransfercoefficientsateachstationareestimated.Thenthesurfacefluxesofmomentum,sensibleheatandlatentheatarecalculatedbyusingbulkformulation,Moreover,thecompositecharacteristicsofdiurnalandmonthlyvariationofsurfacefluxesareemphaticallyanalyzedinthispaper.

简介：台风玛吉(1999)与另一个热带气旋系统交往了并且沿着在它的预先登陆的阶段期间是有点反常的一条西南西轨道移动了。Twonumerical实验在这篇论文被执行用有一个热带气旋bogusing计划的数字天气预言模型系统由沿海、大气的研究的中心开发了的中央规模在台风玛吉的轨道上学习相互作用的效果，科技的香港大学。结果表演气旋系统交往的withMaggie是为玛吉的反常磁道的主要因素。

简介：ApossiblemechanismisputforwardinthispaperforElNinoeventsfromtheviewpointofplatetec-tonicsandoceanicgeology.Anumberofthedataarecitedtoillustratetheviewsthatsea-bottomvolcanicac-tivitiesandhotspringsmaycauseElNinoevents.

简介：Thermalconvectiveprecipitation(TCP)oftenoccursovermainlandChinainsummerwhentheareaisdominatedbythewesternPacificsubtropicalhigh(WPSH).ItiswellknownthattheWPSHoftenbringsaboutlargescalesubsidence,thenwhycoulddeepmoistconvectionoccurandwheredoesthewatervaporcomefrom?Inthispaper,adeepconvectiveprecipitationcasethathappenedon2August2003isstudiedinordertoaddressthesetwoquestions.First,thecharacteristicsoftheTCPeventareanalyzedusingtheTropicalRainfallMeasuringMission(TRMM)satellitedata,automaticweatherstationobservations,andthedatafromtheUSNationalCentersforEnvironmentalPrediction(NCEP).Second,watervaporsourcesareidentifiedthroughexaminingsurfaceevaporation,watervaporadvection,andwatervaporfluxdivergencecalculatedbyusingaregionallyaveragedwatervaporbudgetequation.Furthermore,usinganAdvancedRegionalEta-coordinateModel(AREM),contributionsofsensibleandlatentheatfluxestotheTCParecomparedthroughfoursensitivityexperiments.TheresultsshowthatintheregionscontrolledbytheWPSH,surfacetemperaturerisesrapidlyaftersunrise.Uponreceivingenoughsensibleheat,theairgoesupandleadstoconvergenceintheloweratmosphere.Thenthewatervaporassembledfromthesurroundingsandthegroundsurfaceistransportedtotheupperlevels,andafavorableenvironmentfortheTCPforms.Amodeldatadiagnosisindicatesthatabouthalfofprecipitablewatercomesfromtheconvergenceofhorizontalfluxesofwatervapor,andtheotherhalffromsurfaceevaporation,whilelittleisfromadvection.AdditionalsensitivityexperimentsprovethatbothsensibleandlatentheatingareessentialfortheonsetoftheTCP.Thesensibleheatfluxtriggersthermodynamicascendingmotion,andthelatentheatfluxprovideswatervapor,butthecontributiontoTCPfromthelatterisalittlesmallerthanthatfromtheformer.

简介：用高分辨率的非静水力学的模型ARPS(先进地区性的预言系统)，台风Rananim(0414)被使用CINRADDoppler雷达数据模仿。在台风前后的结果乍见陆地证明模型ARPS表现很好模仿轨道，中心压力的变化，以及Rananim的严重大雨。同时，模仿的合成反射率与观察雷达相比是合成反射率。数字结果表明Rananim的不均匀的结构在它向西偏斜在以后起一个重要作用乍见陆地。Rananim(0414)上的地面效果的敏感模拟实验也被调查，并且东南的中国的地面在它的轨道稍微向右转并且显然增加它的紧张的Rananim上有重要效果，但是当台风是远的离开海岸线时，地面仅仅稍微影响暴风雨紧张在期间它的乍见陆地。结果证明地志的上升极大地作出贡献到降水改进，并且使降水的分发更不平。[出版摘要]

简介：Invoking45-yrdailyEuropeanCentreforMedium-rangeWeatherForecasts(ECMWF)reanalysisdata,firstlyallthesuddenstratosphericwarming(SSW)eventsareselectedintheseyears,whichcanbeclassifiedintotwocategories:downward-propagatingeventandnon-downward-propagatingevent.Andthen,basedonpotentialvorticitydistributiononisentropicsurfaces(IPV),temperaturefield,andzonalwindfield,adetaileddescriptionoftheSSWoccurringduringthewinter-spring(DecemberandthefollowingJanuary,February,March)in2000-01and2001-02isgiven.Finally,theevolvementofpolarvortexduringwarmingprocessandtheimpactofwarmingontropospherearediscussed.Itisfoundthat(1)thereisinter-decadalvariationforstratosphericwarmingphenomenon;(2)theSSWeventlastingfromlateJanuarytillearlyMarchin2001canpropagatedownwardtotroposphere;(3)duringthisSSW,thereiszonal-meaneasterlywindsinbothstratosphereandtroposphere;(4)thetwowarmingeventsduringDecember2001andMarch2002cannotpropagatedownwardtotroposphere,whilezonaleasterlywindsonlyappearinstratosphere;and(5)intheprocessofthetwotypesofwarming,alongandnarrowhigh-valueIPV'tongue'extendsoutfrommainpolarvortex,whichbreaksoutthegradientofIPV.Comparedwiththenon-downward-propagatingstratosphericwarmingcase,thehighestvalueofIPVdepartsfartherfrompoleandthe'tongue'islongerandnarrowerduringthedownward-propagatingwarmingevent.Pinchedbyanticyclonefrommiddlelatitude,thestratosphericpolarvortexwilldisplace,distortorbreakdown.Bycontrast,thechangeofpolarvortexisgreaterinthecourseofdownward-propagatingwarmingevent.Also,tropospherecirculationandpolarvortexevolveindifferentdegree,andusuallybothofthemgowithblocking,buttheaboveevolvementinthedownward-propagatingwarmingismoredistinct.

简介：闪电是有对流暴风雨的大气电的现象。自从1960'的家，它的特征广泛地在奔流的雨，冰雹和旋风的天气过程期间被学习了，很多尝试做了探查进为闪电的形成负责的机制，产生解释闪电开始的二个理论，从传送对流和冰阶段降水的点，分别地。另外，一些研究出现，从各种各样的方面，那闪电显示严重对流天气的出现。有具体索引的缺乏识别闪电特征和生产determinehail云。

简介：ＳＴＵＤＹＯＮＳＯＭＥＭＥＴＥＯＲＯＬＯＧＩＣＡＬＰＲＯＢＬＥＭＳＩＮＨＨＧＡＧＲＩＣＵＬＴＵＲＡＬＰＲＯＤＵＣＴＩＯＮ￥ＧａｏＳｕｈｕａ（高素华），ＧｕｏＪｉａｎｐｉｎｇ（郭建平）．ＡｎＳｈｕｎｑｉｎｇ（安顺清）ａｎｄＷａｎｇＳｈｉｌｉ（王石立）Ｓ...

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：ＡＳＴＵＤＹＯＦＡＮＴＡＲＣＴＩＣＳＹＮＯＰＴＩＣ－ＣＬＩＭＡＴＩＣＶＡＲＩＡＴＩＯＮＡＮＤＧＬＯＢＡＬＣＨＡＮＧＥ￥ＬｕＬｏｎｇｈｕａ（陆龙骅），ＢｉａｎＬｉｎｇｅｎ（卞林根），ＪｉｕＰｅｎｇｑｕｎ（贾朋群）ａｎｄＺｈａｎｇＺｈｅｎｇｑｉｕ（张正秋...

简介：ＰＲＯＧＲＥＳＳＥＳＯＦＴＨＥＳＴＵＤＹＯＮＩＭＰＡＣＴＳＯＦＣＬＩＭＡＴＥＣＨＡＮＧＥＯＮＡＧＲＩＣＵＬＴＵＲＡＬＰＲＯＤＵＣＴＩＯＮＩＮＣＨＩＮＡ￥ＷａｎｇＦｕｔａｎｇ（王馥棠）ＰＲＯＧＲＥＳＳＥＳＯＦＴＨＥＳＴＵＤＹＯＮＩＭＰＡＣＴＳＯＦＣＬＩ...

简介：Inthecontextofadvectiondynamics,19experiments(Exps.)areperformedusingaquasi-geostrophicbarotropicvorticityequationmodeltoexploretheconditionforthemergenceofbinaryvorticesandtheself-organizationofthelargerscalevortex.Resultsshowthattheinitialdistancebetweenthecentersofbinaryvorticesandthenon-axisymmetricdistributionsoftheirinitialvorticityaretwofactorsaffectingthemergenceofbinaryvortices.Thereisacriticaldistanceforthemergenceofinitialsymmetricbinaryvortices,however,themergenceofinitialnon-axisymmetricbinaryvorticesisalsoaffectedbytheasymmetricstructureofinitialvortices.Theself-organizationprocessesin19experimentscanbeclassifiedintotwotypes:oneisthemergingofidentical,axisymmetricbinaryvorticesinwhichtheinteractionofthetwovorticesundergoesslowlychange,rapidchange,andtheformation,stretching,anddevelopmentofthefilamentsofvorticity,andthetwovorticesmergeintoasymmetricvortex,withitsvorticitypiledupintheinnerregioncomingfromthetwoinitialvortices,andthevorticityofthespiralbandintheouterregionfromthestretchingofthefilamentsofthetwoinitialvortices.Andtheothertypeisthemergingofthetwonon-axisymmetricinitialvorticesofanellipticvortexandaneccentricvortexinwhichtheellipticvortex,ontheonehand,mutuallyrotates,andontheotherhandmovestowardsthecenterofthecomputationaldomain,atthesametimeexpandsitsvorticityarea,andatlastformstheinnercoreofresultantstatevortex;andtheeccentricvortexmutuallyrotates,meanwhilecontinuouslystretches,andfinallyformsthespiralbandofresultantstatevortex.Theinteractionprocessischaracteristicofthevorticitypiledupintheinnercoreregionofresultantstatevortexoriginatingfromtheellipticvortexandthevorticityinspiralbandmainlyfromthesuccessivestretchandruptureoftheeccentricvortex.

简介：ＴＨＥＳＴＵＤＹＯＦＴＨＥＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＢＯＵＮＤＡＲＹＬＡＹＥＲＯＶＥＲＨＩＬＬＴＥＲＲＡＩＮＨａｏＷｅｉｆｅｎｇ（郝为锋），ＬｉｕＫａｉ（刘凯）（ＭｅｔｅｏｒｏｌｏｇｉｃａｌＣｏｌｌｅｇｅｏｆＡｉｒＦｏｒｃｅ，Ｎａｎｊｉｎｇ２...

简介：ＴＹＰＨＯＯＮ：ＳＣＩＥＮＴＩＦＩＣ／ＯＰＥＲＡＴＩＯＮＡＬＥＸＰＥＲＩＭＥＮＴＳＡＮＤＤＹＮＡＭＩＣＴＨＥＯＲＥＴＩＣＡＬＳＴＵＤＹ￥ＣｈｅｎＬｉａｎｓｈｏｕ（陈联寿）ａｎｄＸｕＸｉａｎｇｄｅ（除祥德）ＴＹＰＨＯＯＮ：ＳＣＩＥＮＴＩＦＩＣ／ＯＰＥＲ...

简介：Anf-planequasi-geostrophicbarotropicvorticityequationmodelofhighresolutionisdesignedinthispaperinordertoinvestigatethecharactersofvorticitypropagationandtheeffectofnonlinearityonthepropagationwithinatyphooncirculation,whereintwomesoscalevorticescoexistatdifferentradialpositions.Theresultsof10setsofexperimentssuggestthatincomparisonwithonlyonevortex,theintensityoftheinwardpropagationsofvorticitystrengthensdistinctly,vorticitydetainsintheinnerregionoftyphooncirculationforalongertime,andthelocalmaximumwindspeedintheinnerregionincreasesclearly.Theintroductionofnonlinearadvectionintothemodelweakenstheintensityofbothinwardandoutwardpropagationsofvorticity,butmakestheinwardpropagationuptoapositionclosertothecenteroftyphoon.