ESTIMATION OF DIURNAL VARIATION OF DOWNWARD SHORT-WAVE RADIATION USING GMS-5 DATA

In this study, the dataset that is homogeneous in time and space was created by using meteorological and hydrological data obtained during HUBEX-IFO (1998/5/1-8/31). The domain of this dataset is from E110 to E122, and from N31 to N36 with 5min (about 10km) resolution. This dataset was produced to be used as forcing data for Land Data Assimilation by land surface scheme (SIBUC). Although the dataset created from the surface meteorological variables has much difficulty in the description of diurnal variation of radiation, since the original data are daily accumulated values. Then GMS data and the simple physical model are introduced to improve the diurnal variation of downward short-wave radiation. Furthermore, the mesh-data of hourly short-wave radiation is made using this method.