1. Hunan provincial meteorological observatory, Changsha 410007 China 2. Hunan provincial meteorological service center, Changsha 410007 China 3. Hunan provincial meteorological bureau, Changsha 410007 China 4. Yuanjiang Meteorological Bureau, Yuanjiang Hunan 413000 China
Abstract:
The Global and Regional Assimilation and Prediction System (GRAPES), a limited-area regional model, was used to simulate the onset of South China Sea summer monsoon. In view of the relatively insufficient information about the initial field in simulation predictions, the Advanced Microwave Sounding Unit-B (AMSU-B) data from a NOAA satellite were introduced to improve the initial values. By directly using the 3-dimensional variational data assimilation system of GRAPES, two schemes for assimilation tests wer...