Analysis on the Features of Energy Budget on the Complicated Underlying Surfaces in Southeast Tibet

Observation data from the land-atmosphere exchange experiment conducted in Nyingchi Region by the publicservice (weather) scientific research project “observation and study on the land-atmosphere exchange on the complicated underlying surfaces in southeast Tibet”was applied to analyze the characteristics and differences of surface energy typical on different underlying surfaces in typical sunny days and cloudy days.Resultsshowed that: there is a obvious daily variation of net radiation on different underlying surfaces in typical sunny days, the average daily value of net radiation in typical cloudy days decreased significantly; latent heat increased with the increasing of net radiation, and it is smaller in cloudy days than in sunny days; there was a significant difference on the daily variation tendency of sensible heat flux in different underlying surface, but the differences of sensible heat flux between typical sunny days and in typical cloudy days is not obvious; soil heat flux has the same obvious diurnal variation characteristic with net radiation in different underlying surface, the differences of sensible heat flux between night and daytime is not obvious, four kinds of underlying surface soil has energy losses.