中国北西部沙漠での地空相互作用

Abstract

The results of the turbulent observation at Desert station in HEIFE are analyzed. The analyses show the following results: the turbulent fluctuation of the vertical wind component and that of the temperature obey the Monin-Obukhov similarity, especially well in conventive condition, but that of specific humidity does not obey it. The bulk parameterization of momentum flux and that of sensible heat flux can be made. In the convective condition, the sensible heat flux can be expressed in the form of free convection. But the water vapor flux can not be parametarized. Using the bulk parameterization of sensible heat, the heat budget and water budget at Desert station are estimated in 10 days average.At Desert station, almost all radiation energy is transferred into atmosphere by sensible heat flux before summer and latent heat flux becomes larger after summer, when the precipitation is concentrated. The precipitation in mid-summer is larger than evaporation but the evaporation exceeds the precipitation in the whole year.