南海西北部上层海洋对热带气旋响应研究-物理海洋学专业毕业论文

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1、UpperoceanresponseoftheNorthwesternSouthChinaSeatotropicalcycloneAbstractTheSouthChinaSeahasafrequentoccurrenceoftropicalcyclones．Tropicalcyclonecouldtransportthemomentumintotheoceanandtakeawaytheheatduringtheprocessofmoving，andinashorttimeitcancausesignificantchangesofheatandkinetics

2、intheocean．AsanimportantphysicalprocessintheSouthChinaSea,tropicalcyclonehasanimportantimpactonoceanphysics，chemistryandecologicalenvironment．Soitisverymeaningfultounderstandtheresponseoftheupperoceantotropicalcyclones．Inthispaperweusemooredobservationdataandtheremotesensingdataoftrop

3、icalstormWashitostudytheresponsecharacteristicsofupperoceanondynamicandthermodynamicintheNorthwestemSouthChinaSea．Wehavedrawnsomeimportantconclusions，andthemechanismoftheprocessisanalyzedinthepaper．TropicalstormWashipassedthesubsurfacemooringsintheNorthwestemSouthChinaSeaon29to30July2

4、005andtheupperoceanthermalanddynamicalresponsewasexaminedindetail．IntenseseasurfacetemperaturecoolingwasinducedbyWashi，andthemaximumcoolingwas3．6oContherighttrackofWashi．Thewholeobservedwatercolumn(4-75m)wascooledbyWashi，withmaximumcoolingof2。Catthemooringstation．Becauseofthestrongmix

5、ingprocess，themixedlayerdepthdeepensasmuchas10-20m．Thereisastrongupwellinginthelowtemperaturezoneduringtheperiodofthetropicalstorm，andtheEkmanpumpingspeedisgreaterthan1．6x10一m／s．Byusingtheheatbalanceofthemixedlayer,theheatlosscausedbyeachdynamicfactoriscalculated．Theresultsshowthatthe

6、verticalmixingplaysaleadingrole，accountingfor70％，andtheverticalconvectionisrelativelyweak．AfterthepassageofWashi，stronginertialcurrentsaregeneratedbythestormwiththemaxcurrentsupto0．2rn／sintheuppermixlayerandwithaperiodof35h，whichisslightlylessthanthelocalinertialoscillation．Basedonthe

7、fieldobservationdata，theturbulenteddydiffusivityisfoundtohaveincreasedbymorethan3times．KeyWords：SouthChinaSea，tropicalcyclone，SST，upwelling，turbulentmixing万方数据目录摘要(中文)IAbstract(英文)．II1引言．11．1研究背景与意义．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．11．2国内外研究进展与现状．．21．3本文的研究目的与内容．．52资料与方法介绍62．1卫

8、星遥感数据