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气象:2012,38(5):585-592
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WRF模式模拟的地表短波辐射与实况对比分析
(1.中国气象局武汉暴雨研究所,暴雨监测预警湖北省重点实验室,武汉 430074;2.湖北省气象服务中心,武汉 430074;3.湖北省气象能源技术开发中心,武汉 430074)
Comparison of WRF Forecast Downward Shortwave Radiation with Observations—A Pilot Study
(1.Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Wuhan Institute of Heavy Rain, CMA, Wuhan 430074;2.Meteorological Service Centre of Hubei Province, Wuhan 430074;3.Meteorological Energy Development Centre of Hubei Province, Wuhan 430074)
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投稿时间:2011-03-31    修订日期:2011-08-14
中文摘要: 利用中尺度数值模式WRFV3对2009年1、4、8和10月进行了约4个月的逐日(0~36小时)到达地表短波辐射模拟,将输出结果转换成逐小时太阳总辐射,并以武汉站为例,与地表实测逐小时总辐射值进行对比分析。结果表明:(1) 模拟结果与观测结果有较好的对应关系,4个月的日间模拟和观测值的相关系数均在0.8以上,均通过了置信度0.01的显著性检验。(2) 日间各时刻模拟值与实况相比,平均预报误差早晚小,中午大;平均绝对误差变化趋势与平均预报误差相同,平均绝对百分比误差则一般早晚大,09—15时较小且变化幅度小,可信度高于其他时刻。(3) WRFV3模式对太阳总辐射,在各种气象条件下均有一定预报能力,尤其以晴天表现最佳。距直接使用模式输出的地表短波辐射结果作为光伏发电系统初值用于发电量预报还有一些误差,可以尝试采用误差订正等方法修订,提高数值预报结果的可用性。
Abstract:In this paper, the 0-36 h downward shortwave flux at ground surface (SWDOWN) forecasting has been simulated by WRFV3 continuously for approximately four months: January, April, August and October in 2009. The hourly total solar radiation (HTSR) forecasting was converted by the 12-36 h SWDOWN output from WRF simulation. And HTSR forecast was compared with the observation of Wuhan Station. The results show that: (1) the simulation of HTSR is interrelated well with observation. Correlation of every month is larger than 0.8 and corresponds to 0.01 significance levels. (2) Each time HTSR mean forecast errors (MFE) in the morning and evening are smaller than in other time, but the maxima of mean absolute percentage errors (MAPE) appear in the morning and evening. MAPEs from 9 AM to 3 PM change a little and their reliability is higher than in other time. (3) WRFV3 model has ability to forecast the total solar radiation in clear, cloudy or overcast weather conditions, especially good performance in clear sky. However, this simulation is not a perfect initial field for power prediction of photovoltaic systems. Our future work is to use some methods for correcting HTSR forecast and improve their practical application.
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基金项目:公益性行业(气象)科研专项(GYHY201006036),华中区域气象中心科技发展基金重点项目(QY Z 201010)和中国气象局(气预函[2010]76号和气预函[2011]35号)共同资助
引用文本:
王明欢,赖安伟,陈正洪,白永清,成驰,李芬,2012.WRF模式模拟的地表短波辐射与实况对比分析[J].气象,38(5):585-592.
WANG Minghuan,LAI Anwei,CHEN Zhenghong,BAI Yongqing,CHENG Chi,LI Fen,2012.Comparison of WRF Forecast Downward Shortwave Radiation with Observations—A Pilot Study[J].Meteor Mon,38(5):585-592.