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| NUMERICAL SIMULATION OF SOUTH CHINA SEA MONSOON ONSET BASED ON GRAPES MODEL AND EXPERIMENTS ON INITIAL MODEL FIELDS | |
| 作者姓名： | 周 慧 朱国强 陈江民 丁小剑 黄赛群 |
| 作者单位： | ZHOU Hui(Hunan provincial meteorological observatory, Changsha 410007 China);ZHU Guo-qiang(Hunan provincial meteorological service center, Changsha 410007 China);CHEN Jiang-min,DING Xiao-jian(Hunan provincial meteorological bureau, Changsha 410007 China);HUANG Sai-qun(Yuanjiang Meteorological Bureau, Yuanjiang Hunan 413000 China) |
| 基金项目： | National 863 Special Project，Research on Interpretation Techniques for High-Resolution Numerical Prediction of Hunan Province，Research on Rainstorm Forecast System with GRAPES and Its Application and Accessment in Hunan and Key Project of Science in Hunan |
| 摘 要： | 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 were designed. In the design, Test 1 (T1) assimilates both sounding and AMSU-B
data, and Test 2 (T2) assimilates only the conventional sounding data, before applying the model in
simulation forecasts. Comparative experiments showed that the model was very sensitive to initial fields
and successful in reproducing the monsoon onset, allocation of high- and low-level wind fields during the
pentad of onset, and the northward advancement of the monsoon and monsoon rain bands. The scheme,
however, simulated rainfall and the location of the subtropical high with deviations from observations. The
simulated location of the subtropical high was more westward and northward and the simulated rainfall for
the South China Sea was larger and covered a broader area. |
NUMERICAL SIMULATION OF SOUTH CHINA SEA MONSOON ONSET BASED ON GRAPES MODEL AND EXPERIMENTS ON INITIAL MODEL FIELDS |
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| ZHOU Hui,ZHU Guo-qiang,CHEN Jiang-min,DING Xiao-jian and HUANG Sai-qun.NUMERICAL SIMULATION OF SOUTH CHINA SEA MONSOON ONSET BASED ON GRAPES MODEL AND EXPERIMENTS ON INITIAL MODEL FIELDS[J].Journal of Tropical Meteorology,2010,16(4):348-354. | |
| Authors: | ZHOU Hui ZHU Guo-qiang CHEN Jiang-min DING Xiao-jian and HUANG Sai-qun |
| Institution: | 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... |
| Keywords: | numerical simulation GRAPES model South China Sea summer monsoon onset three-dimensional variational assimilation |
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