风廓线雷达中风切变分析方法的初步研究

The preliminary study on analysis method of wind shear using wind profiler

在风廓线雷达连续输出的风场时间高度显示图上,尝试进行风场的流线分析和风切变值等值线分析,以便用于识别强烈风切变区。在风场变化比较均匀时,分析出的线形分布比较平缓,而在风场变化比较剧烈的区域,风向等值线、垂直风切变等值线和流线三者一致表现出了汇聚特点,线形的分布也异常地密集,分析结果直观地反映出了风场分布的特征和危险性风切变区域,该结果有助于风切变自动识别方法的研究。

The wind streamline and wind shear isoline were calculated in wind time-height display image detected by wind profiler.We try to use it to identify the severe wind shear.The line distribution is smooth if wind is uniform.But if there is a abrupt wind field,the streamline and isoline show convergent character simultaneously,and line distribution became crowded together.Based on this finding,we can identify the hazard wind area directly and immediately.The result will help automatically detect the area and intensity of strong wind shear by means of intelligent computer software.