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1、Liang利用遥感技术估算陆表辐射平衡Estimationoflandsurfaceradiationbudgetfromremotesensing梁顺林北京师范大学全球变化与地球系统科学研究院DepartmentofGeographyUniversityofMarylandatCollegePark,USASliang@geog.umd.edu,提纲Liang♣背景♣下行太阳辐射/天空”变亮”与”变暗”♣反照率♣下行长波辐射♣温度，发射率和上行长波辐射♣净辐射LiangLiang我们的地球系统正在经历一场前所未有的变化(TRENBERTHetal.,2007)Li
2、angLiangRadiationBalanceLianghttp://geochange.er.usgs.gov/pub/carbon/fs97137/Liang(Robock,1985)全面的地球观测系统VantagePointsCapabilitiesLiangL1/HEO/GEOFar-TDRSS&SpaceCommercialSatellitesLEO/MEONear-CommercialPermanentSpaceSatellitesandMannedSpacecraftAirborneAircraft/BalloonEventTrackingandCa
3、mpaignsTerrestrialDeployableForecasts&PredictionsUserCommunityLiangJan.AprilJulyOct.Long-term(1984–2000)averageglobaldistributionofdownwardsurfaceshortwaveradiation(Wm−2)(Hatzianastassiouetal.,2005)LiangJan.AprilJulyOct.Long-term(1984–2000)averageglobaldistributionofdownwardnetsurfaces
4、hortwaveradiation(Wm−2)(Hatzianastassiouetal.,2005)LiangGlobaldistributionofsurfaceradiationnetworks:historicGEBA/WRDCstationswithmorethan10years(orangetriangles)and20yearsofmeasurementrecords(redtriangles),manyofthemgoingbacktothe1960s,LiangTrenberthetal.(2009)提纲Liang♣背景♣下行太阳辐射/天空”变亮”
5、与”变暗”♣反照率♣下行长波辐射♣温度，发射率和上行长波辐射♣净辐射LiangIPCCAR4GCMmodelsimulationsandtwosatelliteproductsLiang,S.,K.Wang,andX.Zhang,M.Wild,(2010),Reviewofestimationoflandsurfaceradiationandenergybudgetsfromgroundmeasurements,remotesensingandmodelsimulation,IEEEJournalofSpecialTopicsinAppliedEarthObserv
6、ationsandRemoteSensing,Sept.issueLiang“全球变暗”“全球变亮”太阳辐射短期变化的原因Liang♣大气外部太阳辐射变化：反映在地质年代尺度上，每11年太阳黑子变化只导致±1Wm-2♣大气内部条件的变化水汽：10%变化导致0.5%太阳辐射下降。每1ºC增温导致大概5%的水汽量变化云气溶胶Wang,K.,R.DickinsonandS.Liang,(2009),Clearskyvisibilityhasdecreasedoverlandgloballyfrom1973to2007,Science,323,1468-1470Lia
7、ngWang,K.,R.DickinsonandS.Liang,(2009),Clearskyvisibilityhasdecreasedoverlandgloballyfrom1973to2007,Science,323,1468-1470LiangImpactsofdiffuseradiationonLUE&EFLiang♣Cloudsandaerosolsincreasethediffusecomponentofthesolarradiation;♣Weareproducingbothdirectanddiffuseinsolation/PAR;♣Wang
