CFL-06型风廓线雷达与L波段探空雷达测风对比分析

Comparative Analysis on Wind Data from CFL-06 Wind Profiler Radar and L Band Sounding Radar

为探讨风廓线雷达资料的准确性和可用性,将2016年5月2017年4月张家口的风廓线雷达与L波段探空雷达测风资料进行对比分析。结果表明:1)张家口站大多高度层二者风速呈显著正相关,00:00的相关性优于12:00的,8km以上未通过显著性检验。2)4.11km以下风廓线雷达较L波段探空雷达水平风速偏大,平均误差为0.00~1.50m/s;4.11km以上风廓线雷达较L波段探空雷达水平风速偏小,平均误差为0.00~22.13m/s,并随高度的增加而增大。3)水平风速有效样本率(风速差≤3m/s)整体随高度增加呈先增大后减小的趋势,中低层(1.23~3.63km)的有效样本率较高,为60.0%~70.0%。4)2.196.03km各高度层水平风向的有效样本率(风向差≤20°)较大,稳定在70%~80%,有降水时风向有效样本率随高度的增高而增大,且各高度层波动较大。两个时次风向有效样本多集中在风向差为10°的范围内,28km各高度层有效样本率(风向差≤10°)可达到40%~60%。

In order to explore the accuracy and availability of wind profile radar data, wind data from wind profile radar and L band sounding radar in Zhangjiakou station from May 2016 to April 2017 were analyzed. The results showed as follows. 1)The wind speeds from two kinds of radar were positively correlated in most height layers at Zhangjiakou station and the correlation at 00:00 was better than that at 12:00. The data at layers above 8 km did not pass the significance test. 2)The horizontal wind speed from wind profiler radar was larger than that from L band sounding radar below 4.11 km, and the average deviation was 0.00 1.50 m/s. Above 4.11 km the wind speed from wind profiler radar was smaller than that from L band sounding radar, and the average deviation was 0.00 22.13 m/s, and increased with the height. 3)The effective sample rate of horizontal wind speed (wind speed difference≤3 m/s) was first increased and then decreased with the increase of height. The effective sample rate in the middle and lower levels ( 1.23 3.63 km) was higher, which was 60.0% 70.0 %. 4)The effective sample rate of horizontal wind direction (wind direction difference≤20°) at 2.19 6.03 km was higher and stable between 70% 80%, which increased with the height when there was precipitation, and the fluctuation between each height layer was larger. The effective sample at two times was more concentrated in the wind direction difference range of 10°. The effective sample rate (wind direction difference≤10°) can reach 40% 60% at 28km.