摘要
Soilisheterogeneousandhasdifferentthermalandhydraulicproperties,causingvariedbehaviorinheatandmoisturetransport.Therefore,soilhasanimportanteffectonland–atmosphereinteractions.Inthisstudy,animprovedsoilparameterizationschemethatconsidersgravelandorganicmatterinthesoilwasintroducedintoCLM4.5(CommunityLandModel).ByusingdatafromtheZoigeandMadoisitesontheTibetanPlateau,theabilityofthemodeltosimultaneouslysimulatethedurationoffreeze–thawperiods,soiltemperature,soilmoisture,andsurfaceenergyduringfreeze–thawprocesses,wasvalidated.Theresultsindicatedthat:(1)thenewparameterizationperformedbetterinsimulatingthedurationofthefrozen,thawing,unfrozen,andfreezingperiods;(2)withthenewscheme,thesoilthermalconductivityvaluesweredecreased;(3)thenewparameterizationimprovedsoiltemperaturesimulationandeffectivelydecreasedcoldbiases;(4)thenewparameterizationschemeeffectivelydecreasedthedrybiasesofsoilliquidwatercontentduringthefreezing,completelyfrozen,andthawingperiods,butincreasedthewetbiasesduringthecompletelythawedperiod;and(5)thenetradiation,latentheatflux,andsoilsurfaceheatfluxoftheZoigeandMadoisitesweremuchimprovedbytheneworganicmatterandthermalconductivityparameterization.
出版日期
2017年05月15日（中国期刊网平台首次上网日期，不代表论文的发表时间）
