| Performance Evaluation of the GRAPES Model in Wind Simulations Over South China |
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| 作者姓名： | 钟水新 陈子通 丁伟钰 徐道生 张艳霞 吴凯昕 梁家豪 田群 王立稳 |
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| 摘 要： | In the present study, the performance of the GRAPES model in wind simulation over south China was assessed. The simulations were evaluated by using surface observations and two sounding stations in south China. The results show that the GRAPES model could provide a reliable simulation of the distribution and diurnal variation of the wind. It showed a generally overestimated southerly wind speed especially over the Pearl River Delta region and the south of Jiangxi Province as well as the coastal region over south China. GRAPES also exhibited a large number of stations with the opposite surface wind directions over the east of Guangxi and the south of Jiangxi during the nocturnal- to-morning period, as well as an overall overestimation of surface wind over the coastal regions during the afternoon. Although GRAPES could simulate the general evolutional characteristics of vertical wind profile, it underestimated wind speed above 900 hPa and overestimated wind speed below 900 hPa. Though the parameterization scheme of gravity wave drag proved to be an effective method to alleviate the systematic deviation of wind simulation, GRAPES still exhibited large errors in wind simulation, especially in the lower and upper troposphere.
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| 关 键 词： | GRAPES wind simulation overestimated surface wind systematic deviation |
| 收稿时间： | 2020-04-30 |
Performance Evaluation of the GRAPES Model in Wind Simulations Over South China |
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| ZHONG Shui-xin,CHEN Zi-tong,DING Wei-yu,XU Dao-sheng,ZHANG Yan-xi,WU Kai-xin,LIANG Jia-hao,TIAN Qun and WANG Li-wen.Performance Evaluation of the GRAPES Model in Wind Simulations Over South China[J].Journal of Tropical Meteorology,2021,27(1):1-9. |
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| Authors: | ZHONG Shui-xin CHEN Zi-tong DING Wei-yu XU Dao-sheng ZHANG Yan-xi WU Kai-xin LIANG Jia-hao TIAN Qun and WANG Li-wen |
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| Institution: | Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction/ Guangzhou Institute
of Tropical of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou 510080 China |
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| Abstract: | In the present study, the performance of the GRAPES model in wind simulation over south China was assessed. The simulations were evaluated by using surface observations and two sounding stations in south China. The results show that the GRAPES model could provide a reliable simulation of the distribution and diurnal variation of the wind. It showed a generally overestimated southerly wind speed especially over the Pearl River Delta region and the south of Jiangxi Province as well as the coastal region over south China. GRAPES also exhibited a large number of stations with the opposite surface wind directions over the east of Guangxi and the south of Jiangxi during the nocturnal- to-morning period, as well as an overall overestimation of surface wind over the coastal regions during the afternoon. Although GRAPES could simulate the general evolutional characteristics of vertical wind profile, it underestimated wind speed above 900 hPa and overestimated wind speed below 900 hPa. Though the parameterization scheme of gravity wave drag proved to be an effective method to alleviate the systematic deviation of wind simulation, GRAPES still exhibited large errors in wind simulation, especially in the lower and upper troposphere. |
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| Keywords: | GRAPES wind simulation overestimated surface wind systematic deviation |
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