毫米波云雷达与探空测云数据对比分析

Comparative Analysis of Cloud Observed by Millimeter Wave Cloud Radar and Sounding

应用中国气象局大气探测综合试验基地2015年8—12月数据,对Ka波段毫米波云雷达与L波段探空云底高、云顶高及云垂直结构的探测进行对比分析,从分析结果可以看出,毫米波云雷达发射的电磁波能够穿透厚度较大的云层,探测出云垂直结构,所探测的云底高和云顶高与L波段探空结果保持良好的一致性。进一步分析一些云底、云顶高度差异较大的个例,得知与探空气球的漂移造成地域偏差和L波段探空相对湿度探测的误差相关。研究结果表明,Ka波段毫米波云雷达不仅探测能力强,探测精度也较高,是地基云探测的一种有效手段。

This paper employs the data from atmospheric sounding comprehensive test site in CMA （China Meteorological Administration） from August to December in 2015, and carries on the contrast analysis about cloud base height, cloud top height and cloud vertical structure to the Ka-band millimeter wave cloud radar and L-band sounding data. The analysis result indicates that the electromagnetic wave transmitted by the millimeter wave cloud radar can penetrate the thick clouds to detect cloud vertical structure, keeping a good consistency with the results of sounding. Further analysis of some large differences in individual cloud base and top height shows that the difference is correlated with the sounding balloon drifting caused regional deviation and the L-band sounding relative humidity detection error. The results finally show that the detection capability of Ka-band millimeter wave cloud radar is strong, and the detecting precision is higher, thus the radar is an effective means of the ground-based cloud detection.