预览加载中,请您耐心等待几秒...
1/10
2/10
3/10
4/10
5/10
6/10
7/10
8/10
9/10
10/10

亲,该文档总共25页,到这已经超出免费预览范围,如果喜欢就直接下载吧~

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

1.INTRODUCTIONToestimatethecomponentsofenergybalance Conventionaltechniques:pointmeasurements(pointscales) Recently:Remotesensing(regionalscales) Validationofestimatedsensibleheatflux Conventionaltechniques:pointmeasurements(pointscales) i.e.Bowenratiosystem,Eddycorrelationsystem Recently:LargeApertureScintillometers(LAS)(regionalscales) 1.INTRODUCTIONSEBS(SurfaceEnergyBalanceSystem) wasdevelopedbyZ.Sutoestimatelandsurfacefluxesusingremotelysenseddataandavailablemeteorologicalobservations.Fig.2ThestructureSEBS(Wangetal.,2008)2.METHODOLOGY2.METHODOLOGY2.METHODOLOGY2.METHODOLOGYLASmeasurements: ArouCounty,eastofQinghaiprovince coveredwithgrasslandsandwithanaltitudeabout3000m TheLASmademeasurementsalongapathbetweentransmitter(38°03′24.3″N,100°28′16.4″E)andreceiver(38°02′18.1″N,100°27′25.9″E)withdistanceof2390m. Fig.3ThelocationofLASonMODISpixels; Where,TisthetransmitterofLASlocatedonMODISpixel; RisthereceiverofLASlocatedonMODISpixel.MODISproductsandpreprocessing ·ALBEDO ·EMISSIVITY NCEPdataandpreprocessing ●Previousresearchusingempiricalrelationship: ●anewapproachtoderivethevalueofproposedbyKunYang(2003)isbeingusedinthispaper. Accordingtothis,canbeconsideredconstantoverashortperiod,sinceisphysicallyrelatedtotheunderlyingsurfaceandnotsensitivetothediurnalvariationofatmosphericstability. ●thespecificvaluesoffromMaytoSeptemberin2011areasfollows(Table1.): Table.2valuesbeingusedinthispaper4.RESULTSANDANALYSIS4.RESULTSANDANALYSIS4.RESULTSANDANALYSIS4.RESULTSANDANALYSIS4.RESULTSANDANALYSIS4.SENSITIVITYANALYSISFig4.Sensitivityofsensibleheatflux(H)whenvaryingfrom2kto34kFig5.Sensitivityofsensibleheatflux(H)whenvaryingu_pblfrom1m/sto20m/s●Sensitivityanalysisshowed,andallinfluencedsensibleheatstrongly.However,theinfluencedisappearedwhensensibleheatreachedthemaximumvalueunderdrylimit.Besides,therelationshipbetweenandsensibleheatfluxwaslinear,whileforothertwoparameters,therelationshipwasnon-linear.5.DISCUSSIONANDCONCLUSIONThankYou!