The Suspended Sediment Concentration Distribution in the Bohai Sea, Yellow Sea and East China Sea-中国期刊网

摘要 Thedistributionofthesuspendedsedimentconcentration(SSC)intheBohaiSea,YellowSeaandEastChinaSea(BYECS)isstudiedbasedontheobservedturbiditydataandmodelsimulationresults.Theobservedturbidityresultsshowthat(i)thehighestSSCisfoundinthecoastalareaswhileintheoutershelfseaareasturbidwaterismuchmoredifficulttoobserve,(ii)thesurfacelayerSSCismuchlowerthanthebottomlayerSSCand(iii)thewinterSSCishigherthanthesummerSSC.TheRegionalOceanModelingSystem(ROMS)isusedtosimulatetheSSCdistributionintheBYECS.AcomparisonbetweenthemodeledSSCandtheobservedSSCintheBYECSshowsthatthemodeledSSCcanreproducetheprincipalfeaturesoftheSSCdistributionintheBYECS.Thedynamicmechanismsofthesedimenterosionandtransportprocessesarestudiedbasedonthemodeledresults.ThehorizontaldistributionoftheSSCintheBYECSismainlydeterminedbythecurrent-waveinducedbottomstressandthefine-grainsedimentdistribution.Thecurrent-inducedbottomstressismuchhigherthanthewave-inducedbottomstress,whichmeansthetidalcurrentsplayamoresignificantroleinthesedimentresuspensionthanthewindwaves.TheverticalmixingstrengthisstudiedbasedonthemixedlayerdepthandtheturbulentkineticenergydistributionintheBYECS.Thestrongwintertimeverticalmixing,whichismainlycausedbythestrongwindstressandsurfacecooling,leadstohighsurfacelayerSSCinwinter.HighsurfacelayerSSCinsummerisrestrictedinthecoastalareas.

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The Suspended Sediment Concentration Distribution in the Bohai Sea, Yellow Sea and East China Sea

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The Suspended Sediment Concentration Distribution in the Bohai Sea, Yellow Sea and East China Sea

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