简介：

简介：ＴＨＥＥＡＲＬＹＳＵＭＭＥＲＦＬＯＯＤＰＥＲＩＯＤＳＯＦＳＯＵＴＨＥＲＮＣＨＩＮＡＡＮＤＴＨＥＳＵＭＭＥＲＭＯＮＳＯＯＮＣＩＲＣＵＬＡＴＩＯＮＯＦＥＡＳＴＡＳＩＡ￥ＨｕａｎｇＳｈｉｓｏｎｇａｎｄＴａｎｇＭｉｎｇｍｉｎ黄士松，汤明敏（Ｄｅｐａｒｔｍｅｎ...

简介：基于每日的NCEP分析数据，OLR和卫星降雨数据，在2004的华南海夏季风(SCSSM)的活动的特征被分析。Theresults比正常和紧张比正常强壮证明SCSSM的建立很少迟了。由向西北和平的副热带的高度的地点影响了，它比正常向北方并且向西多，SCSSM在华南海区域主要是活跃的。在那里存在的明显的intraseasonal摆动和SCSSM的二个重要时期，一个人是about20-30天和另外的大约40-50天。潮湿的交通被专注于华南海和西北太平洋区域，减少向北方交通并且在南部的中国导致干旱。

简介：ByapplyinganewvortexdetectionmethodtotheECMWF40-yrreanalysis(ERA40)datafrom1985to2002,theclimatologyofsummervorticeshasbeeninvestigatedinfivesubtropicalregions,i.e.,thenorthwesternPacific,northeasternPacific,northwesternAtlantic,northeasternAtlantic,andAustralia-SouthPacific,followedbyvalidationwithNCEP/NCARreanalysisdata.Resultsareasfollows:(1)ThespatialdistributionsofERA40vortexactivities(VAC)werewellconsistentwiththoseofNCEP/NCARreanalysis(NRA)resultsinallregions,especiallyinnorthwesternPacific.(2)Becauseofdifferentmodelresolutions,boththenumberandintensityofvorticesobtainedfromNRAweresignificantlyweakerthanERA40's.(3)Vorticesmainlycruisedincoastsandtheadjacentseas,fromwheretothelandortheopenseavortexactivitiesweregraduallydecreased.(4)ThereweretwoactivecentersinthenorthwesternPacific:onewaslocatedinSouthChinaSeaandtheother,asthelargestcenterofthefiveregions,spreadfromtheeastsideofthePhilippinestoJapan.(5)OverthenorthwesternAtlantic,mostvorticesoccurredinPanamaanditswest-sideoffshore.(6)ThespatialdistributionsofvorticeswerealikebetweenthenortheasternPacificandnortheasternAtlantic,bothspreadingfromcoaststothewest-sideseaat5°-20°N.(7)IntheAustralia-SouthPacific,vorticeswerenotasactiveasthoseintheotherfourregions,andmostlytookplaceintheequator-sideofnearoceanareas.(8)ExceptthenorthwesternPacificandnorthwesternAtlantic,theVACinterannualvariationsintheotherthreeregionsweredifferentbetweenERA40andNRAdata.(9)InthenorthwesternPacificandnorthwesternAtlantic,theVACinterannualvariationcouldbeseparatedtoseveraldistinctstages.(10)Sincethemid1980s,meanvortexintensitywasgettingincreasedinthenorthwesternPacific,whichwasmostsignificantinthesubtropicalareasonaglobalbasis.InthewesternNorthAtlantic,therewasadecreasing(increasing)trendofthemeanvortexintensitybefo

简介：Theanalysisof43yearsofNCEP-NCARreanalysisdataandstationobservationsrevealstheconnectionsbetweentropospherictemperaturevariationsandtheweakeningoftheIndiansummermonsooncirculation.TheIndiansummermonsoonvariationisstronglylinkedtotropospherictemperatureoverEastAsia,showingsignificantpositivecorrelationsofmeantropospherictemperaturewithall-Indiansummerrainfallandthemonsooncirculationintensity.TheresultshowsthatIndiansummermonsooncirculationunderwenttwoweakeningprocessesinrecentdecades.Thefirstoccurredincircathemid-1960s,andtheotheroccurredincircathelate1970s.ThefindingindicatesthatthemeantropospherictemperaturemayplayacrucialroleintheweakeningoftheIndiansummermonsoonintensityviachangingland-seathermalcontrast.TheroleofthetropospherictemperaturecontrastbetweenEastAsiaandthetropicalareafromtheeasternIndianOceantothetropicalwesternPacificistoweakentheIndiansummermonsooncirculation.

简介：卢佩生ＥｖｏｌｕｔｉｏｎｏｆＡｓｉａｎＳｕｍｍｅｒＭｏｎｓｏｏｎａｎｄｔｈｅＳｌｏｗｌｙＶａｒｙｉｎｇＤｉｓｔｕｒｂａｎｃｅｓ￥ＬｕＰｅｉｓｈｅｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＡｔｍｏｓｐｈｅｒｉｃＰｈｙｓｉｃｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅ...

简介：统计downscaling的二条途径在19602008期间在夏天在北京车站基于每日的最大、最小的温度观察的百分位数被用于温度极端的索引。一个人到过由起初使用文件结束分析和逐步的线性回归的下阶层的每天最大、最小的温度，然后计算极端的索引；其它到过直接下阶层由使用季节的大规模温度和geo潜在的高度记录的基于百分位数的索引。交叉验证结果证明后者途径比前者有更好的表演。然后，后者途径在北中国被用于48个气象学的车站。所有48个车站的交叉验证结果显示出在基于百分位数的索引和季节的大规模变量之间的靠近的关联。最后，在北中国的温度极端的索引的未来情形被把统计downscaling用于哈德利中心投射联合模型版本3(HadCM3)在代表性的集中小径下面的模拟4.5(RCP4.5)第五的情形联合了模型内部比较的工程(CMIP5)。结果证明每日的最大的温度的第90百分位数将在所有地s珀?珀由大约1.5talSe增加吗？？

简介：TheregionalcharacteristicsofprecipitationanomaliesoftotalsummerprecipitationofJune,JulyandAugustandindividualmonthlyprecipitationareanalyzedbyusingthemethodofVarimaxEOFandcorrelationanalysis.Thedatasetusedistheprecipitationofa5°Lat.×5°Long.spatialuniformnetworkoverChinaintheperiodof1959to1994.TheanalysisoftotalsummerprecipitationshowsthatthemostsignificantregionalcharacteristicistheexistenceofnegativecorrelationinprecipitationanomaliesbetweenthelowerreachesoftheChangjiangRiverandtheHuaiheRiverValley(theLRCHregion)andthemiddlereachesoftheHuangheRiverValley(theMRHregion),andbetweentheLRCHregionandSouthChina.TheprecipitationanomalyovertheSichuanBasinisnegativelycorrelatedwiththatovereasternpartofQinghai-XizangPlateauandthatovertheLRCHregion.TheregionalcharacteristicsofsummerprecipitationanomaliesinwesternChinaarethatthereexistsnegativecorrelationbetweenthesummerprecipitationanomaliesoverthesouthernpartofthecentralandeasternQinghai-XizangPlateauandthatoveritsnorthernpart.TherealsoexistspositivecorrelationbetweenthesouthernpartofthecentralandeasternQinghai-XizangPlateauandtheeasternpartofNorthChinaandthesouthernpartofNortheastChina.Theabovespatialcorrelationmodeshavesignificantperiodsofabout3yearsandtenyears.TheanalysisofthemonthlyprecipitationshowsthatinJunethereexistspositivecorrelationamongtheprecipitationanomaliesovertheLRCHregion,theeasternpartofNorthChinaandNortheastChina.InJuly,theprecipitationsintheMRHregionandtheLRCHregionarenegativelycorrelated.TheregionalcharacteristicofprecipitationanomaliesinAugustisverysimilartothatofthetotalsummerprecipitationanomalies.

简介：Theradiativeforcing(RF)ofAsiandesertdustanditsregionalfeedbackstotheEastAsiansummermonsoon(EASM)systemareinvestigatedwithacoupledregionalclimate-desertdustmodel.Thestatisticalsignificanceofdesertdusteffectsareanalyzedthrough20summerseasons(1990-2009).Inordertoestimatethedusteffectsreasonably,someimprovementhasbeenachievedforthecoupledmodel,includingtheupdatesofopticalpropertiesanddesertsourceareadistribution.WefindthatthedesertdustcanresultinaroughlyweakenedmonsoonineasternChina,KoreanPeninsula,JapanandIndianPeninsulaandastrengthenedmonsooninIndochinaPeninsulainthelowertroposphere.Moreover,theprecipitationcomparisonsbetweenobservationaldataandsimulatedpatternsarealsosuggestiveofthedesertdusteffectontheEASM.Intheuppertroposphere,thesouthwardshiftofthewesterlyjet(WJ)bythedusteffectcanbeseenasanindicatoroftheweakenedmonsooningreatpartofthemonsoonareas.Thechangeofthemoiststaticenergy(MSE)contrastbetweenlandandoceanisthemainreasonfortheEASMvariations.

简介：Byanalysisofobservationdata,thispaperdemonstratesthatpollutionparticlescouldreducesurfacewindspeedthroughblockingsolarradiationtotheground.ThecomparationbetweentemperatureatthelowlandmeteorologicalstationXi’anandthatoverthenearbyhighlandstationMt.HuasuggeststhatsurfacesolarradiationatXi’anisreducedduetotheincreasinganthropogenicaerosols.Thereducedsurfaceenergysuppressestheatmosphericinstabilityandconvectiveflows,andthusthedownwardtransferoffasterwindsaloftisreduced.Consequently,windspeedsnearsurfaceareweakened.Thisreductionofsurfacewindsisshownbythesignificantreversetrendsofwindspeedsoverthetwostationsatdifferentelevations.Theaerosols’effectsonwindsarealsomanifestedinthetrendsofradionsondewindspeed.ThedecreasedsurfacewindsinXi’anhavealsoreducedlocalpanevaporation.

简介：Inthispaper,weuseatwo-dimensionalprimaryequationmodelwhichcontains(1)heatingofradiation,(2)heatingofcondensation,and(3)transfersofsensibleandlatentheatbetweenairandtheunderlyingsurface.ToinvestigatethecausesfortheformationoftheeasternNorthPacificsum-mermonsoon,thedataat110°Wareobtainedandwindsatunderlyingsurfaceandat200hPaaremodifiedundertheconditions(1)removingtopographyand(2)changingmeridionalseasurfacetem-perature(SST)gradient.Inthenumericalmodification,wefindthatbyremovingthetopography,thecenter’slocationoftheeasternNorthPacificsummermonsoondoesnotchange,buttheintensityofthesummermonsoonisweakened.AlsotheonsetofthesummermonsoonisdelayedtotheendofMay.Thetropicaleast-erlyjetisweakenedobviously,evenchangestowesterlywind.Ontheotherhand,wefindthattheSSTgradientalong110°WinfluencestheeasternNorthPacificsummermonsoondistinctly.IftheSSTgradientisdecreased,thecenterofthesouthwestwindnear12°Ndoesnotexistanymore.theintensityofthewholesummermonsoonbecomesveryweakandthecirculationpatternofthesummermonsoonalsochangesalot.Finally,weindicatethatbothtopographyandmeridionalSSTgradientplayimportantrolesintheoccurrenceoftheeasternNorthPacificsummermonsoon.ThemeridionalSSTgradientisthemostimportantfactorthattriggersthesummermonsoonandthetopographyalong110°Winfluencestheintensityandtheonsettimeofthesummermonsoontheremostly.

简介：在这篇论文，关于亚洲热带夏天季风(ATSM)的发作的相对系统的climatological研究被执行。基于ATSM发作，ATSM最新被献殷勤的全部的然后ATSM第一爆发在热带东方印度洋和中间、南部的印度支那半岛上的看法的一个统一索引进一步被记录，它在第26五(关于5月10日)，然后在在第28五的华南海(SCS)上。看起来，在二个区域上的ATSM发作属于一样的季风系统的不同阶段。然后，ATSM的发作机制被全面分析进一步在陆地海上调查热力学的对比，intraseasonal摆动，等等并且影响ATSM发作的几个关键因素被提出。把结果基于这些，大气的发行量的ATSM第一爆发在热带东方印度洋，印度支那半岛，和SCS上的图解的地图也是的可能的climatological介绍的、也就是季节的进化是季风发作的背景；改进并且向北方在印度支那半岛和它的附近的区域上的传送对流，理智的加热并且潜伏的加热进展，在东方西藏的高原上的印度缅甸马槽，和西的温暖的移流的戏剧的加深是夏天季风发作的主要驱动力，它做了区域和上升运动开发的在这上第一反向的温度的南方的坡度。然后，热带季风和降水很快发展了并且提高。30-60-day和10-20-day的阶段锁低频率摆动从不同来源发源是为夏天季风发作的另一个被触发的因素。它只是最早导致了ATSM的这些因素的普通效果在这个区域上的发作。

简介：ＳｉｍｕｌａｔｉｏｎｏｆＥａｓｔＡｓｉａｎＳｕｍｍｅｒＭｏｎｓｏｏｎｗｉｔｈＩＡＰＣＧＣＭＣｈｅｎＱｉｙｉｎｇ（陈起英），①ＹｕＹｏｎｇｑｉａｎｇ（俞永强）ａｎｄＧｕｏＹｕｆｕ（郭裕福）ＩｎｓｔｉｔｕｔｅｏｆＡｔｍｏｓｐｈｅｒｉｃＰｈｙｓｉｃｓ，Ｃｈ...

简介：ＭＯＮＴＨＬＹＡＮＤＳＥＡＳＯＮＡＬＯＰＥＲＡＴＩＯＮＡＬＮＵＭＥＲＩＣＡＬＷＥＡＴＨＥＲＰＲＥＤＩＣＴＩＯＮＩＮＴＨＥＳＵＭＭＥＲＯＦ１９９４ＳｏｎｇＱｉｎｇｌｉ（宋青丽）ａｎｄＺｈｅｎｇＱｉｎｇｌｉｎ（郑庆林）ＭＯＮＴＨＬＹＡＮＤＳＥＡＳＯＮＡＬ...

简介：在季风发行量上与亚洲夏天季风和他们的影响的预言联系的风地的系统的错误在这份报纸被学习了。每天运作的分析和预报(直到day-5)预报的中等范围天气(NCMRWF)的国家中心，印度在为时期6月的亚洲夏天季风领域上，1995的7月和8月为目的被成为使用。与低级流动联系的系统的错误描出，在贸易的力量的减小弯屈导致在印度洋上生气赤道的流动以及西的流动变弱。上面的水平误差意味着在回来流动的强度西藏的反气旋和减小变弱进南部的半球。进一步，这些错误随预报时期的增加表示成长趋势。除了动能预算学期的一般低估，模型预报没能代表短暂旋涡。预报显示在旋涡的变换的增加的趋势意味着动能。这些错误使衰弱有预报时期的增加的亚洲夏天季风循环。关键词季风-系统的错误-动能预算作者对为提供数据和计算设备执行现在的学习的NCMRWF感激。

简介：Therelationshipbetweentheall-IndiasummermonsoonrainfallandsurfacepressureovertheIndianregionhasbeenexaminedtoobtainausefulpredictorforthemonsoonrainfall.Thedataseriesofall-Indiamonsoonrainfallandthemeanpressuresofthreeseasonsbeforeandafterthemonsoonseasonaswellasthewinter-to-springpressuretendency(MAM-DJF)at100stationsfortheperiod1951-1980havebeenusedintheanalysis.Theall-Indiamonsoonrainfallisnegativelycorrelatedwiththepressureofthespring(MAM)seasonprecedingthemonsoonandwinter-to-springseasonaldifferenceaspressuretendency(MAM-DJF),atalmostallthestationsinIndia,andsignificantlywiththepressuresovercentralandnorthwesternregions.Theaveragemeansealevelpressureofsixstations(Jodhpur,Ahmedabed,Bombay,Indore,SagarandAkola)intheWesternCentralIndian(WCI)regionshowedhighlysignificant(at1%level)andconsistentCCsof-0.63forMAMand-0.56forMAM-DJFfortheperiod1951-1980.T

简介：ThetimingoftheSouthAsianHigh(SAH)establishmentovertheIndochinaPeninsula(IP)fromApriltoMayanditsrelationstothesetupofthesubsequenttropicalAsiansummermonsoonandprecipitationovereastern-centralChinainsummerareinvestigatedbyusingNCEP/NCARdailyreanalysisdata,outgoinglongwaveradiation(OLR)dataandthedailyprecipitationdatafrom753weatherstationsinChina.ItisfoundthatthetransitionsofthezonalwindverticalshearandconvectionestablishmentovertropicalAsiaareearlier(later)intheyearsofearly(late)establishmentofSAH.Inthelowertroposphere,anti-cyclonic(cyclonic)anomalycirculationdominatestheequatorialIndianOcean.Correspondingly,thetropicalAsiansummermonsoonestablishesearlier(later).Furthermore,theatmosphericcirculationandthewatervaportransportintheyearsofadvancedSAHestablishmentaresignificantlydifferentfromthedelayedyearsinAsiainsummer.Out-of-phasedistributionofprecipitationineastern-centralChinawillappearwithaweak(strong)SAHandwesternPacificsubtropicalhigh,strong(weak)ascendingmotionintheareasouthofYangtzeRiverbutweak(strong)ascendingmotionintheareanorthofit,andcyclonic(anti-cyclonic)watervaporfluxanomalycirculationfromtheeastern-centralChinatowesternPacific.Accordingly,thetimingoftheSAHestablishmentattheupperlevelsofIPisindicativeofthesubsequentonsetofthetropicalAsiansummermonsoonandtheflood-droughtpatternovereastern-centralChinainsummer.

简介：WesternChinaexperiencedanextremehotsummerin2015,breakinganumberoftemperaturerecords.Thesummermeansurfaceairtemperature(SAT)anomalywastwicetheinterannualvariability.Thehottestdaytimetemperature(TXx)andwarmestnight-timetemperature(TNx)werethehighestinChinasince1964.Thisextremehotsummeroccurredinthecontextofsteadilyincreasingtemperaturesinrecentdecades.Wecarriedoutasetofexperimentstoevaluatetheextenttowhichthechangesinseasurfacetemperature(SST)/seaiceextent(SIE)andanthropogenicforcingdrovetheseverityoftheextremesummerof2015inwesternChina.Ourresultsindicatethatabout65%-72%oftheobservedchangesintheseasonalmeanSATandthedailymaximum(Tmax)anddailyminimum(Tmin)temperaturesoverwesternChinaresultedfromchangesinboundaryforcings,includingtheSST/SIEandanthropogenicforcing.Fortherelativeroleofindividualforcing,thedirectimpactofchangesinanthropogenicforcingexplainabout42%oftheSATwarmingand60%(40%)oftheincreaseinTNxandTmin(TXxandTmax)inthemodelresponse.ThechangesinSST/SIEcontributedtotheremainingsurfacewarmingandtheincreaseinhotextremes,whicharemainlytheresultofchangesintheSSToverthePacificOcean,whereasuperElNi?oeventoccurred.OurstudyindicatesaprominentroleforthedirectimpactofanthropogenicforcingintheseverityoftheextremehotsummerinwesternChinain2015,althoughthechangesinSST/SIE,aswellastheinternalvariabilityoftheatmosphere,alsomadeacontribution.

简介：TheimpactoforbitalparametersontheclimateofChinaintheHoloceneissimulatedfrom11kaBPto0kaBPwithanintervalof1kausingNationalCenterforAtmosphericResearch(NCAR)CommunityAtmosphereModelversion2(CAM2).Thegeographicdistributionsofsummerprecipitationaroundboth9kaBPand4kaBPwererealisticallycapturedbyCAM2,comparedtotheproxydatacollectedfrom80stations.Amongallorbitalparameters,theprecessionplaysamajorroleincomputingsolarradiation,whichdominatesthevariationsofsummerprecipitationoverChinaduringtheHolocene.Thesummersaround9kaBPwerethewettestinChina.Lateron,theprecipitationgraduallyreducedtotheminimumaround0kaBPbyabout10%.ThistremendouschangeoccurredfromtheNortheastChinaandtheeasternInnerMongoliaextendingsouthwestwardstotheQinghai-TibetPlateau,especiallyovertheQinghai-TibetPlateau.

简介：Usingamodifiednumericalmodelwithhigherresolutionbothhorizontalandverticaldirections,thesurfacefluxesofthesensibleandlatentheatintheHEIFE(HeiheFieldExperiment)regionwerediagnosed.Basedonstatisticalanaly-sisforthediagnosticfluxes,therepresentativenessandlocationofobservationalstationsintheHEIFEregionwereinves-tigated,aconcreteschemeforsettinguptheobservationalstationsintheHEIFEregionwithdifferentunderlyingsur-facesareobtainedandthegeneralprincipleofchoosingthelocationsofobservationalstationswithbetterrepresentativenessisproposed.