EFFECTS OF CONDENSATION HEATING AND SURFACE FLUXES ON THE DEVELOPMENT OF A SOUTH CHINA MESOSCALE CONVECTIVE SYSTEM （MCS）-中国Betway体育网页登陆

摘要 AsensitivenumericalsimulationstudyiscarriedouttoinvestigatetheeffectsofcondensationheatingandsurfacefluxesonthedevelopmentofaSouthChinaMCSthatoccurredduring23-24May1998.Theresultsrevealthefollowing:(1)CondensationheatingplaysanimportantroleinthedevelopmentofMCS.Ineverydifferentstage,withoutcondensationheating,MCSprecipitationissignificantlyreduced,andquicklydissipates.(2)CondensationheatingdemonstratesmostimportantlyduringtheearlydevelopmentstagesofMCSvortex;asthevortexdevelopsstronger,thecondensationheatingeffectsreduces.(3)ByaffectingtheMCSdevelopmentprocesses,condensationheatingalsoinfluencestheformationofMCSmesoscaleenvironmentstructurefeaturessuchaslow-leveljet(mLLJ),upper-leveldivergence.(4)Bychangingtheantecedentenvironmentalcirculation,thesurfacefluxesalsoplayanimportantroleinthedevelopmentofMCS.Becauseofthesurfaceheating,pressuredeclinesovertheheavyrainfallandMCShappeningregions,whichresultsintheintensificationofsoutherlyflowsfromtheoceanalongtheSouthChinacoastlineareas,andleadstotheenhancementofhorizontalconvergenceandincreaseofvaporamountinthelowerlayer.Allofthesemaketheatmospheremoreunstableandmorefavorablefortheconvection.

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EFFECTS OF CONDENSATION HEATING AND SURFACE FLUXES ON THE DEVELOPMENT OF A SOUTH CHINA MESOSCALE CONVECTIVE SYSTEM （MCS）

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