Evaluation and Analysis of CFSR Data Based on Spring Gale Observation over Coastal Areas of Yellow Sea and Bohai Sea
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Abstract:
Based on the surface observation wind field datasets at 34 stations over the coastal areas of the Yellow Sea and Bohai Sea from 2008 to 2010 in spring, the CFSR (Climate Forecast System Reanalysis) reanalysis datasets of the 10 m wind field are analyzed and evaluated. Results show that the mean errors and mean absolute error of hourly wind speed of CFSR are mostly around 1 to 2 m/s; the mean error is around -1 to -3 m/s for the wind force above 6; at A platform, Chengshantou and Xiliandao sites, it is around -3 to -4 m/s. The mean error of daily wind speed is between -2 to 2 m/s and the maximum is -3 m/s at Chengshantou site. For the wind over force 6, the mean error is usually below -4 m/s, but is about -47 m/s at the Xiliandao site. The evaluation values of CFSR are much smaller for the stations closer to the sea and the wind force above 6; moreover, the error of daily wind speed is larger than that of hourly wind speed by 1 m/s. The stations with wind over force 7 caused by the northern cyclone are the most, and the mean error is mostly between -4 and -5 m/s. When the synoptic systems are the southern cyclone and lowtrough cold front, the mean error is above -5 m/s at Chengshantou and Xiliandao station. The evaluation of CFSR is generally accurate for the frequency and its direction of the northwest and north wind produced by various synoptic systems and south wind produced by the northern cyclone and the weather pattern of “high in the east and low in the west,” but it is slightly worse for the northeast and east wind caused by the southern cyclone.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.