风廓线雷达与多普勒天气雷达风矢产品对比及相关分析

利用成都地区2010年8月和北京沙河地区2011年7—8月风廓线雷达以及多普勒天气雷达的风廓线探测资料,结合对应时段的天气现象相关记录,通过对比分析得到以下结论:①弱降水条件下,在300~2100m高度内,风廓线雷达与多普勒天气雷达探测具有很好的相关性,风向相关系数平均值为0.596,风速相关系数平均值为0.736,在做预报时两者可以同时应用,互为补充;②强降水天气条件下,风廓线雷达与多普勒天气雷达探测的风向、风速变化趋势基本一致,特别是在300~2100m之间各个高度上风向、风速相关性较好,风向相关系数平均值为0.573,风速相关系数为0.508,且风廓线雷达比多普勒天气雷达探测到的各层风向、风速变化更为详细、直观;③阴天条件下风廓线雷达与多普勒天气雷达的风向、风速相关性低层比高层好;④晴天条件下,风廓线雷达更适合用于预报和监测天气。

Comparative Analysis of Wind Vector Products of Wind Profiling Radar and Weather Radar

By means of Doppler radar and Wind Profiling radar data,along with weather reports in August, 2010in Chengdu and July and August 2011in Beijing,an analysis is made of the abilities of different radar to identify the corresponding weather phenomena.The comparative analysis indicates：（1）when there is weaker precipitation,the correlation between horizontal wind directions and speeds obtained by the two kinds of radar is very good within the heights of 300to 2100meters,and the wind direction correlation coefficient is 0.596,and that of wind speeds is 0.736,which should be considered together for forecasting;（2）under the condition of heavy rainfall,the correlation between horizontal wind directions and the speeds obtained by the two kinds of radar is good at different altitudes,especially from 300to 2100meters,and the correlation coefficient of the wind directions is 0.508,and that of wind speeds is 0.573.The wind vector products of wind profiling radar give more details;（3）in overcast weather,the correlation between horizontal wind directions and speeds obtained by the two kinds of radar is better at lower levels than that at higher levels;（4）under sunny conditions,the wind profiling radar is more suitable for weather forecasting and monitoring.