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 resul...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 nocturnalto-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.展开更多
基金National Key R&D Program of China(2018YFC1507602)National Natural Science Foundation of China(41505084,41875079)+1 种基金Guangzhou Science and Technology Project(201804020038)Guangdong Province Public Welfare Research and Capacity Construction Project(2017B020218003)
文摘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 nocturnalto-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.
