OnthebasisofgradientdataofthesurfacelayerobtainedfromfoursetsofAutomaticWeatherStation(AWS)installedinLhasa,Nagqu,XigazeandNyingchiontheTibetanPlateaufromJuly1993toMarch1999accordingtotheprojectofPRC-JapanAsiamonsoonmechanismcooperativeresearch,theseasonalsurfaceroughnesslengthsanddiurnalbulktransfercoefficientsateachstationareestimated.Thenthesurfacefluxesofmomentum,sensibleheatandlatentheatarecalculatedbyusingbulkformulation,Moreover,thecompositecharacteristicsofdiurnalandmonthlyvariationofsurfacefluxesareemphaticallyanalyzedinthispaper.
