科尔沁边界层风廓线雷达探测性能评估

利用2016～2017年科尔沁边界层风廓线雷达每6min的风场资料评估雷达探测性能,主要针对风廓线雷达数据获取率、风廓线雷达与常规探空探测风的相关性等进行了分析。结果表明：风廓线雷达平均数据获取率随高度的增加先增大后减小,3000米以下平均数据获取率都在60%以上。雷达探测数据存在日出后数据缺测率高,午后缺测率低的变化趋势。各层数据获取率与气温和比湿的相关系数分别在0.45和0.35左右。对比风廓线与常规高空探测数据发现：二者v分量的相关系数大于u分量；各高度层中400米到1900米的u分量的相关系数在0.4以上,500米到3400米的v分量的相关系数都在0.6以上；风廓线雷达与常规探空数据u分量相关系数随风速的增大时而减小,从春季到冬季u、v分量相关系数都呈减小趋势。各个季节中风廓线雷达与常规探空数据风速平均偏差春季最小、冬季最大。

Assessing the performance of wind profile radar in Horqin Grassland

The detection performance of wind profiler radar (WPR) was evaluated based on the wind field data of the Horqin boundary layer WPR, which was conducted every 6 minutes from 2016 to 2017. The data acquisition rate of the WPR and the correlation between the WPR and the radiosound wind were analyzed. The results show that the average data acquisition rate of WPR first increases and then decreases with the increase of altitude. The average data acquisition rate below 3000 meters is above 60%. The radar detection data has a tendency of high data loss rate after sunrise and low loss rate in the afternoon. The correlation coefficient between the data acquisition rate of each layer and the temperature is about 0.45. And the correlation coefficient with the specific humidity is about 0.35. Comparing the WPR with radiosound data, it is found that the correlation coefficient of the v component is greater than the u component. At each level, the correlation coefficient of the u component from 400 m to 1900 m is above 0.4 , and the correlation coefficient of the v component from 500 m to 3400 m is above 0.6. The correlation coefficient of u component decreases with the increase of wind speed, while the correlation coefficients of u and v components shows a decreasing trend from spring to winter. The average deviation of wind speed between the WPR and the radiosound wind data has the minimum in spring and the maximum in winter.