ERROR GROWTH IN NUMERICAL PREDICTION AND ATMOSPHERIC PREDICTABILITY

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摘要 ThearticleistoreportsomeresultsofnumericalexperimentsontheerrorgrowthandtheatmosphericpredictabilityExperimentswithtwo-levelglobalbaroclinicprimitiveequationspectralmodelhavemainresultsasfollows.Themagnitudeofinitialerrorsdirectlyaffectstheerrorgrowth,butitsdistributionformhaslittleeffectonthegrowth.Thelossofpredictabilityresultingfromsmall-scaleerrorismuchgreaterthanthatfromlarge-scaleerror.Thesmall-scaleerrorrapidlygrowsandistransferredtothelarge-scaleerrorbyinteractionbetweendifferentscalewaves,whichstimulatesthegrowthoferrorforthewholesystemOrographicforcingrestrainsplanetary-scaleerror(wavenumbers0—3)butenhancesthesmall-scaleerror(wavenumbers8orgreater).Hence,orographiceffectsontheerrorgrowthcloselydependonthecharacteris-ticscaleofinitialerrors,andtheremaybeacriticalwavenumberbetween4and7.Theerrorgrowthisgreat-erinNorthernHemispherethaninSouthernHemisphereifinitialerrorsarethesame.Intheendwegivesomediscussionsaboutmodel,initializationscheme,etc.,toimprovemodelprediction.
机构地区 不详
出处 《气象学报:英文版》 1990年3期
出版日期 1990年03月13日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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