南海北部内孤立波能量和水体输运分析

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1、万方数据EnergyandvolumetransportbyInternalSolitaryWavesinnorthernSouthChinaSeaAbstractInternalsolitarywavesisoneoftheimportantdynamicprocessesintheocean，duetoitsstrongvelocity,largeamplitudeandgreatinfluencesphere，ISWsshouldcarrytremendousenergy,horizontalandverticalvolumetransportduringpr

2、opagationfromwestofLuzonStrait，throughthedeepbasinandontothecontinentalshelf．ButduetothelimitofdepthandtimerangeofobservationinSCSisrare，thefull-depthcharacteristicparameters，energy,energyflux，volumetransportofISWsandtheirtimevariationareunknown．Thecharacteristicparameters，energy,energ

3、yflux，volumetransportoflSWsarecalculated，andtheirtimevariationareanalyzed．ISWsarepresent7．5％ofthetimeat2000mdepthinthedeepbasinofSCS．ISWsareweakerinthewinterbecauseofthedeepsurfacemixedlayerandweakerstratification．AndISWsareleastfrequentinthewinter,0．67numperday,andmostfrequentinthesum

4、mer,1．28num／day．Themaximumalong-wavevelocityexceeds2m／s，itis0．89m／sonaverage．Themaximumamplitudeisaslargeas187m．anditis95montheaverage．Thepropagationdirectionvarymainlyfrom270。Nto300。Nandis283oNonaverage，ISWspropagatewestward．Thetimevariationofenergyisanalyzed，theenergyandenergyfluxofI

5、SWsislargerinthesummerandweakerinthewinter．Thekineticenergyandavailablepotentialenergyareroughlyequal，theenergyofISWsatmooringpositionisO(1Gd／m)．Energyfluxincludesvelocity-pressureworktermandnonlinearadvectionofenergy,neutralregressionindicatesuE=O．144up，theannualmeanenergyfluxis-7．72K

6、W／m，velocity-pressureworktermandnonlinearadvectionofenergyis-6．73KW／mand-O．99KW／m．respectively．ForthevolumetransportationofISWs，itislargerinsummerandautumn，andleastinwinter．ThecontinuoushorizontaltransportationofparticlebyISWsisasfaras40／on．Theannualmeanvolumetransportwas一4．62采lsintheu

7、pperlayerand3万方数据6．04稿}sinthelowerlayer．ItwasthesameorderwithmesoscalceddiesbecauseofthehighfrequencyandintensityofISWinSCS．TheasymmetryofISWscausednetheattransportwhichwasmainlydownward．ThedepthaveragedheatfluxofoneISWwasashighaso(105W／m2)．TheannualmeandepthaveragedJwasdownward2．05K