PARAMETERIZATION OF MOBILIZATION AND TRANSPORT OF SAND-DUST DURING BLACK STORM AND MESOSCALE NUMERICAL EXPERIMENTS-中国Betway体育网页登陆

摘要 Thetypicalblackstormsorsand-duststormsinthenorthwesternChinaaregeneratedanddevelopedthroughaninteractionbetweenthespecificlargescalecirculationpatternandmesosealesystems.Thepassingby/overahugesand-abundantdesertofastrongcoldfrontwithintensivefrontalzoneatmidandlowerlevelsisanecessaryconditionfortheformationanddevelopmentofablackstormoraseveresand-duststorm.Inordertoinvestigatethemechanismofthesand-dustmobilization,transportandsedimentationduringtheblackorsand-duststorms,aparameterizationschemeofsand-dustsource-sinktermsandanequationoftransportforthesand-dustwereproposedandincorporatedintotheMM4mesoscalemodel.ThemodifiedMM4modelwasappliedtothe“May1993”blackstormcaseandsucceededinreproducingtheevolutionoftheweathersystemsassociatedwiththeblack-storm,thesand-dustconcentrationatsurfacelayeranditsverticaldistribution,andthesand-dustsedimentationandtransport.Ourresultsshowthatthenumericalsimulatingmethodbyusingamesoscalemodel,withinclusionofanequationofthesand-dusttransportandaparameterizationschemeofthesand-dustsource-sinkterms,isapromisingapproachtostudythemechanismforsand-dustmobilization,transportandsedimentationduringasand-duststormevent.

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PARAMETERIZATION OF MOBILIZATION AND TRANSPORT OF SAND-DUST DURING BLACK STORM AND MESOSCALE NUMERICAL EXPERIMENTS

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