Numerical Study of Mid-Range Weather Forecast Using Corrected FGGE-III b Data over Qinghai-Xizang Plateau

Five numerical tests were performed by using a northern hemispheric spectrum model with two different resolutions, T21L5 and T42L9, for 00 GMT 15—20 June, 1979. The initial fields used are the FGGE-III b data at 00 GMT over the Qinghai-Xizang Plateau. The results show that there are certain errors on FGGE-III b data at 00 the Plateau, and the errors in the upper troposphere are larger than those is lower troposphere. The correction of initial data over the Plateau has a remarkable effect on numerical forecast results, especially on the results of the model with higher resolution. The corrected initial fields affect not only the forecast over the Plateau, but also the east of China and Japan through energy dispersion, even Alaska and Northern America in about five days