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《植被葉面積指數(shù)與葉片聚集度系數(shù)遙感反演方法研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、RetrievalofleafareaindexandfoliageclumpingindexfromremotelysenseddataByGaolongZHUSupervisor：Prof．JingmingCHENProf．WeiminJ1JADissertationSubmittedtoSchoolofGeographicalandOceanographicSciencesofNanjingUniversityInpartialfulfillmentoftherequirememsforthedegreeofDoctorofPhilosophy2011Thisresearchis
2、sponsoredbyNationalHighTechnologyResearchandDevelopmentProgramofChina(No．2009AAl22134)SPECIALIZATION：．CartologyandGeographicInformationSystem．．．．．．．．．．．POSTGRADUATE：Q壘Q!Q墜g圣鯉ABSTRACTLeafareaindex(LAI)isoneofthemostimportantstructuralparameterscontrollingthevegetationbiophysicalprocesses，andisthe
3、reforeneededinmostlandprocessmodeling．AsanadditionalbiophysicalparameterofcomparableimportancetoLAI，theclumpingindexquantifiesthedeviationoftheleafspatialdistributionfromtherandomcase。ItisusefulforconvertingtheeffectiveLAItothetrueLAIandforseparatingthecanopyintosunlitandshadedleavesinphotosynth
4、esisandevapotranspirationmodeling．However,duetothelackofhighresolutionmulti。angularremotesensingdata，thereareonlyfewclumpingindexmapsavailablepresently．Thisthesisisfocusedonanewinversionalgorithmofthe500mresolutionclumpingindexandtrueLAIfromMODIS(ModerateResolutionImagingSpectroradiometer)data．T
5、he500mresolutionclumpingindexandtrueLAIoverChinaarefirstpresentedinthisstudy,whichcanbesuppliedtousersforvariouslandsurfacestudies．The500mresolutionMODISBRDF(BidirectionalReflectanceDistributionFunction)modelparametersproduct(MCD43A1)makesuseofmulti．dateobservationdataandasemi—empiricalkernel-dr
6、ivenBRDFmodel(Ross．Limodel)todetermineaglobalsetofBRDFparametersdescribingtheanisotropicbehaviorofsurfacescattering，whichprovidesanewwaytoretrievetheclumpingindexofvegetatedsurfacesoverlargeareas．TheabilityoftheRoss．Limodeltosimulatethebidirectionalreflectanceisassessedbycomparingitssimulatedref
7、lectancebasedontheMCD43A1datawithobservedPOLDER一3(PolarizationandDirectionalityofEarthReflectance)BRDFdata．ItisfoundthattheRoss．Limodelsimulateswellthebidirectionalreflectanceofgroundobjectsatmostobservationangles，butsignifi
