Cloud and Radiation Processes Simulated by a Coupled Atmosphere-Ocean Model

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    摘要 UsingNCC/IAPT63coupledatmosphere-oceangeneralcirculationmodel(AOGCM),two20-yrintegra-tionswereprocessed,andtheirabilitytosimulatecloudandradiationwasanalysedindetail.Theresultsshowthatthemodelcansimulatethebasicdistributionofcloudcover,andhowever,obviousdifferencesstillexistcomparedwithISCCPsatellitedataandERAreanalysisdata.Thesimulatedcloudcoverislessingeneral,especiallytheabnormallowvaluesinsomeregionsofocean.Byimprovingthecloudcoverscheme,simulatedcloudcoverintheeasternPacificandAtlantic,summerhemisphere'soceansfromsubtropicaltomid-latitudeisconsiderablyimproved.ButinthetropicalIndianOceanandWestPacificthecloudcoverdifferenceisstillevident,mainlyduetothedeficiencyofhighcloudsimulationintheseregionsresultingfromdeepcumulusconvection.Intermsoftheanalysisonradiationandcloudradiativeforcing,wefindthatsimulationonlongwaveradiationisbetterthanshortwaveradiation.Thesimulationerrorofshortwaveradiationiscausedmostlybythesimulationdifferenceinshortwaveradiativeforcing,seaice,andsnowcover,andalsobynotinvolvingaerosol'seffect.Thesimulationerroroflongwaveradiationismainlyresultingfromdeficiencyinsimulatingcloudcoverandunderlyingsurfacetemperature.Correspondingtoimprovementofcloudcover,thesimulatedradiation(especiallyshortwaveradiation)ineasternoceans,summerhemisphere'soceansfromsubtropicaltomid-latitudeisremarkablyimproved.Thisalsobringsobviousimprovementtonetradiationintheseregions.
    机构地区 不详
    出处 《气象学报:英文版》 2007年4期
    出版日期 2007年04月14日(中国Betway体育网页登陆平台首次上网日期,不代表论文的发表时间)
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