学科分类
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42 个结果
  • 简介:作为要学习的区域拿欧洲的主要陆地,新卫星重力技术的潜力:追踪的satellite-to-satellite(SST)并且与SST模型一起改进地区性的重力场模型的精确性被调查。这些模型的缺点被讨论。与是的GPM98C参考,几个另外的模型,的严肃异例剩余最近的SST全球重力场模型(EIGEN系列和GGM系列),被计算并且比较。在选择区域,有期刊性质的一些系统的错误在EIGEN和GGM存在的比较表演的结果是在高度和顺序的S系列模型。没在经典严肃模型被显示出的一些信息在EIGEN和GGM的S系列模型的低、中间的度和顺序被检测。最后,SST模型的有效的最大的度和订单被建议。

  • 标签: 卫星跟踪 地心力 物理大地测量 SST
  • 简介:为测试作为这个区域拿中国,新卫星严肃技术的潜力,为改进地区性的重力场模型的精确性追踪的satellite-to-satellite被学习。与是的WDM94引用,三个模型,的严肃异例剩余最近二个优雅全球重力场模型(EIGEN_GRACE02S,GGM02S)并且EGM96,被计算并且比较。为在三个模型的剩余之中的差别的原因被讨论。在剩余之间的Thecomparison证明在选择区域,EIGEN_GRACE02S或GGM02S比在更低的度部分(不到110度)的EGM96好。通过模型严肃异例剩余的分析,另外,有期刊性质的一些系统的错误在EIGEN和GGM模型,的更高的度部分存在,这被发现结果能也在SST严肃数据的确认作为引用被拿。

  • 标签: SST 重力场 中国 卫星 物理大地测量
  • 简介:CHAOTICOUTPUTOFSSTFLUCTUATIONSTOCHASTICMODELWITHGIVENPARAMETERS¥YanShaojinandPengYongqing严绍瑾,彭永清(NanjingInstituteofMeteorolog...

  • 标签: STOCHASTIC system multiple BIFURCATION CANTOR set
  • 简介:SpatialandtemporaldistributioncharacteristicsandscalerangeoftwosignificantareaswereobtainedbyanalyzingtherelationshipamongsummerrainfallinYunnanprovince,heightfieldandSSTfield(40°S-40°N,30°E-70°W)acrosstheNorthHemisphereat200hPa,500hPaand850hPaforJan.toMayandcorrelation,andfieldwavestructure.RemotekeyregionsamongsummerrainfallinYunnanprovince,heightfieldandSSTfield(40°S-40°N,30°E-70°W)acrosstheNorthHemisphereat200hPa,500hPaand850hPawerestudiedthroughfurtheranalyzingofthecirculationsystemanditsclimate/weathersignificance.TheresultshowsthattheforecasthasdependablephysicalbasiswhenheightandSSTfieldswereviewedaspredictorsandphysicalmodelsofimpactsonrainyseasonprecipitationinYunnanarepreliminarilyconcluded.

  • 标签: 云南 降雨量 雨季 天气预报 循环模式 地表分布
  • 简介:TheIndianOcean(IO)seasurfacetemperature(SST)wasanalyzedbyusingempiricalorthogonalfunction(EOF),andtheleadingmodeofIndianOcean(LMIO)SSTwasextracted.ThemajorspatialandtemporalcharactersofLMIOwerediscussed,andtherelationshipsbetweenLMIOwithIndiansummermonsoon(ISM)andwithChinasummerrainfalls(CSR)wereinvestigated,thentheimpactsofLMIOonAsiansummermonsoon(ASM)circulationwereexplored.Somenotableresultsareobtained:ThesignificantevolutionalcharactersofLMIOaretheconsistentwarmingtrendofalmostthewholeIObasin,thedistinctivequasi-3-andquasi-11-yroscillationsandremarkablyinterdecadalwarmingin1976/1977and1997/1998,respectively.TheLMIOimpairedthelowerlevelcirculationofISMandwascloselyrelatedwiththeclimatetrendofCSR.ItwasassociatedwiththeweakeningofSouthAsianhigh,theeasterlywindssouthoftheTibetanPlateau,andthecross-equatorialflowsover10°-20°N,40°-110°Eattheupperlevel;withthestrengtheningofSomalicross-equatorialjetbuttheweakeningofthecirculationofISMinthesectorofIndia,thestrengtheningofsouthwindoverthemiddleandlowerreachesofYangtzeRiverandSouthChinabuttheweakeningofsouthwesterlywindsoverNorthChinaatlowerlevelandwiththeincreasingofsurfacepressureovertheAsianContinent.ChangesinthemoisturefluxtransportsintegratedverticallyoverthewholetroposphereassociatedwithLMIOaresimilartothoseinthelowerlevelcirculation.Tosumup,thesignificantSSTincreasingtrendofIObasinwasoneoftheimportantcausesforweakeningoftheASMcirculationandthesouthwardsshiftingofChinasummerrainband.

  • 标签: LMIO 中国 夏季雨量 印度夏季季风气候 亚洲夏季气候
  • 简介:Bymeansofsimulationexperimentswithatwo-dimensionalzonal-meanmodel,astudyismadeoftheinfluenceofthewesternNorth-Pacificmidlatitudesea-surfacetemperature(SST)anomaliesonthecirculationpatternandwet-seasonalprecipitationovertheEast-ChinaChangjiang-HuaihereachesandtheNorth-Chinaplain.TheSSTanomaliesaredividedintotwotypes,onebeing“colderinthesouthandwarmerinthenorth”andtheotherjustopposite,dependingonseason.Resultsshowthattheoccurrenceoftheanomaliesisfollowedbyconsiderablechangesinthepositionofthesubtropicalhighhappeningfor3-5monthstocome.Forinstance,thespring“colderinthesouthandwarmerinthenorth”anomaloustype(i.e.,colderfor20—35°N,andwarmernorthof35°N)leadstotheintensificationofthesummersubtropicalhigh,withtheridgelinemovedslightlynorthward,resultingindroughtoverChangjiangreachesforJuly-AugustandinexcessiverainfallintheNorth-Chinaplain,andviceversa.

  • 标签: seasonal NORTHWARD ANOMALOUS SUBTROPICAL drought rainfall
  • 简介:BasedontheSSTandwavedataobservedbyvesselspassingthroughtheNanshaIslandswaters,thispaperanalysesElNinoevent’seffectonhydrologicalfactorsintheabovewaters.Thepaperconcludes(1)SSTintheNanshaIslandswatervarieswiththatoftheEasternEquatorialPacificOceaninsynchronousphase,butvarieswiththatoftheWesternEquatorialPacificOceaninoppositephase;(2)theseastateinNanshaIslandswatersisrough,thefrequencyofgreatwaveincreasesintheyearofElNino,especiallyinthenextyearoftheyearofElNino.Thepaperdiscussesthereasonsfortheabovephenomena.

  • 标签: EL Nino SST WAVE Nansha Isknd
  • 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。

  • 标签: SST FIELDS thermal FORCING OSCILLATION LOW-FREQUENCY
  • 简介:这篇论文调查在mei-yu和诺思大西洋海面温度异常(SSTA)之间的关系。结果证明他们显著地在十的时间规模上与对方被联系。mei-yu降水和mei-yu持续时间被重要十的可变性描绘。他们的十的部件密切在前面的冬季与诺思大西洋SSTA的一个三倍的模式被相关。回归分析证明冬诺思大西洋SSTA可以在东亚夏季风(EASM)循环上强加推迟的影响,在十的时间的mei-yu可伸缩。SSTA的坚持在这堂功课期间起一个重要作用。SSTA模式能从冬季坚持直到迟了的春天的三元组。春季SSTA可以使从西方欧亚大陆宣传到东亚的一列静止波浪火车激动并且在mei-yu上施加影响,这被建议。

  • 标签: 年代际变化 冬季温度 大气科学 气候异常
  • 简介:TropicalCyclone(TC)tracksoverthewesternNorthPacific(WNP)during1949–2007,obtainedfromChinaMeteorologicalAdministration/ShanghaiTyphooninstitute,areclassifiedintothreetracktypes.ThesetypesarethemainpathwaysbywhichTCsinfluencethecoastofEastAsia.Therelationshipsbetweenlocalseasurfacetemperature(SST)inWNPandTCtracksarerevealed.ResultsshowthatthelocalSSTplaysanimportantroleinTCtracks,thoughtherelationshipsbetweenlocalSSTandthefrequenciesofdifferentTCtracksareverydissimilar.ThelocalSSThassignificantpositivecorrelationwithnorthwest-pathTCs,andnegativecorrelationwithrecurving-pathTCs.However,thewest-pathTCsdonothavestatisticallysignificantrelationshipwiththelocalSST.TheupperseatemperatureanomalieswhichinfluenceTCtrackslastaboutsixmonthsbeforeTCoccurrence.FurtheranalysisindicatesthattheoceanconditionsinfluenceTCtracksbymodifyingtheatmosphericcirculation,andthenthemodifiedatmosphericcirculationcanaffectTC’sgenesislocationandmotion.

  • 标签: 热带气旋轨道 西方的诺思太平洋 SST
  • 简介:一个微弱地联合的吸收系统,在SST,观察通过一个整体被吸收进acoupled气候模型(CASESM-C)最佳的插值计划,被建立。这个系统是为历史的气候模拟的一个有用工具,显示出实质的优点,包括维持大气的反馈,并且阻止海洋的地远漂流离开观察,在其它之中。在联合模型集成期间,在分析的表面和表面下的海洋的地的偏爱能与unassimilated地相比被减少。从系统,气候学和气候系统的interannual可变性基于输出的30模型年被评估。结果证明系统罐头相当复制climatological全球降水和SLP,但是它仍然受不了双ITCZ问题。而且,ENSO脚印,它被ENSO相关的表面空气温度,geopotential高度和降水在ElNi期间揭示?o进化,被系统基本上复制。系统能也在西方的诺思太平洋区域,大气的反馈为气候模拟在是关键的在interannual和intraseasonaltimescales上模仿观察SST降雨关系很好。

  • 标签: 数据同化 海洋资源 海温场 气候系统 评价 气候模式
  • 简介:现在的学习在冬季调查华南海(SCS)SST和ENSO的影响(1月鈥揊ebruary鈥揗arch;JFM)在由为时期使用车站观察的华南和它的动态过程上的降雨1951鈥?003,为时期的遇见的办公室哈德利中心SST数据1900鈥?008,并且为时期的ERA-40分析数据1958鈥?002。在华南上的JFM降雨与Ni有重要关联,这被发现?o-3和SCSSST。分析在ElNi显示出那?o或积极SCSSST异例年,在700hPa的西南的异例在华南海上统治,它接着搬运更多的潮湿进华南并且赞成增加的降雨。部分回归分析显示对冬季降雨的独立ENSO影响主要在华南上发生,而SCSSST在华南的北部分在冬季降雨上有更大的独立影响。在华南上的温度在表面附近在300hPa和增加显示出明显的减少,与Ni导致的前者?o-3和后者SCSSST异例。这提高对流不稳定性并且削弱潜在的涡度(PV),它解释加强在华南上登上运动和JFM降雨的增加。关键词ENSO-华南海-SST-降雨-对流不稳定性-潜在的涡度

  • 标签: ENSO事件 南中国海 冬季降水 SST 冬小麦 Sea
  • 简介:NotesOnthefeaturesoftheSSTannualcycleandsurfaceheatbudgetintheSouthChinaSeaINTRODUCTIONTheannualcycleintheoceanandatmospheres...

  • 标签: China
  • 简介:Basedonourpreviouswork,thewinterseasurfacetemperature(SST)intheKuroshioExtension(KE)regionshowedsignificantvariabilityoverthepastcenturywithperiodsof~6abetween1930and1950and~10abetween1980and2009.HowtheactivityoftheAleutianLow(AL)inducesthisdual-periodvariabilityoverthetwodifferenttimespansisfurtherinvestigatedhere.Forthe~6aperiodicityduring1930–1950,negativewindstresscurl(WSC)anomaliesinthecentralsubtropicalPacificassociatedwithanintensifiedALgeneratepositiveseasurfaceheight(SSH)anomalies.Whenthesewind-inducedSSHanomaliespropagatewestwardstotheeastofTaiwan,Chinatwoyearslater,positivevelocityanomaliesappeararoundtheKuroshiototheeastofTaiwanandthenthemeanadvectionviathiscurrentofvelocityanomaliesleadstoastrengthenedKEjetandthusanincreaseintheKESSToneyearlater.Forthe~10aperiodicityduring1980–2009,anegativeNorthPacificOscillation-likedipoletakes2–3atodevelopintoasignificantpositiveNorthPacificOscillation-likedipole,andthisprocesscorrespondstothenorthwardshiftoftheAL.NegativeWSCanomaliesassociatedwiththisALactivityinthecentralNorthPacificareabletoinducethepositiveSSHanomalies.TheseoceanicsignalsthenpropagatewestwardintotheKEregionafter2–3a,favoringanorthwardshiftoftheKEjet,thusleadingtothewarmingoftheKESST.ThefeedbacksoftheKESSTanomalyontheALforcingarebothnegativeforthesetwoperiodicities.Theseresultssuggestthatthedual-periodKESSTvariabilitycanbegeneratedbythetwo-wayKE-SST-ALcoupling.

  • 标签: 周期响应 海温异常 Low 黑潮 北太平洋涛动 速度异常
  • 简介:InterannualvariationsinthesurfaceandsubsurfacetropicalIndianOceanwerestudiedusingHadISSTandSODAdata-sets.Windandheatfluxdatasetswereusedtodiscussthemechanismsforthesevariations.OurresultsindicatethatthesurfaceandsubsurfacevariationsofthetropicalIndianOceanduringIndianOceanDipole(IOD)eventsaresignificantlydifferent.AprominentcharacteristicoftheeasternpoleistheSSTAreboundafteracoolingprocess,whichdoesnottakeplaceatthesubsurfacelayer.Inthewesternpole,thesurfaceanomalieslastlongerthanthesubsurfaceanomalies.ThesubsurfaceanomaliesarestronglycorrelatedwithENSO,whiletherelationshipbetweenthesurfaceanomaliesandENSOismuchweaker.Andthesubsurfaceanomaliesofthetwopolesarenegativelycorrelatedwhiletheyarepositivelycorrelatedatthesurfacelayer.Thewindandsurfaceheatfluxanalysissuggeststhatthethermoclinedepthvariationsaremainlydeterminedbywindstressfields,whiletheheatfluxeffectisimportantonSST.

  • 标签: 印度洋偶极子 热带印度洋 温跃层深度 SST 海温异常 ENSO
  • 简介:TheinterannualvariationsofatmosphericheatsourcesandmoisturesinksovertheEquatorialPacificandtheirrelationswiththeSSTanomaliesarestudiedusingECMWFreanalysisdatafrom1979to1993.Itisfoundbysingularvaluedecomposition(SVD)analysisthattheregioninthetropicalPacificwithhighpositivecorrelationbetweentheverticallyintegratedheatsourceanomalyandtheSSTanomaly,andbetweentheverticallyintegratedmoisturesinkanomalyandtheSSTanomaly,ismainlylocatedinalongandnarrowbelttotheeastof170(Ebetween5(Sand5(N.TheanalysisoftheverticalstructureofatmosphericheatsourcesandmoisturesinksshowsthattheinterannualvariationsofQ1,Q2andSSTintheequatorialcentralandeasternPacificarestronglyandpositivelycorrelatedinthewholetroposphereexceptthebottom(962.5hPa)andthetop(85hPa)layers.However,inthewesternPacific,theinterannualvariationsofQ1below850hPaisnegativelyrelatedtotheSST.Thecorrelationcoefficientatthelevel962.5hPareacheseven-0.59.InotherlayersthepositivecorrelationbetweentheinterannualvariationsofQ1,Q2andtheSSTareweakinthewesternPacific.

  • 标签: 太平洋热带 海平面 温度异常 大气热力 ENSO
  • 简介:介绍了一种基于SST89E58RD2的中小电子产品测试的智能系统设计方案,详细描述了针对麻将机主板测试的系统实现过程,并从SST89E58RD2单片机的特性、智能测试系统方案以及后续的功能展望等方面进行阐述。

  • 标签: 智能测试 SPI下载 DI DO FLASH存储器