对风廓线雷达和L波段雷达探空观测的水平风场的一致性评估

利用浙江省2015—2018年萧山站风廓线雷达和杭州国家基准气候站L波段雷达探空资料，对这2种观测设备的水平风场一致性进行了评估。与以往评估方法不同的是，本文将气球向风廓线雷达方向漂移的廓线作为对照样本，以减少2种设备不同源同址以及探空气球非水平定向漂移对评估结果的影响。分析结果显示，在无降水条件下，高度在1~5.5 km时，风廓线雷达的水平风场与L波段雷达探空的水平风场一致性较好，且随高度变化差异不显著，2种观测，u分量的相关系数为0.95，平均绝对偏差和均方根误差分别为1.47和2.29 m·s^-1，v分量的相关系数为0.87，平均绝对偏差和均方根误差分别为1.52和2.12 m·s^-1；高度在1 km以下时，2种观测的u分量和v分量的相关系数均约为0.5，u分量和v分量的均方根误差均在2~8 m·s^-1，考虑近地层风的不稳定性，加之观测地相距较远，此评估结果可信度较低。此外，降水条件下的统计结果与无降水条件下的统计结果无显著差异。

Consistency assessment of the horizontal wind field based on the data from the wind profiler radar and the L-band upper-air meteorological sounding

The consistency of horizontal wind fields based on the data from the two observation devices,namely the wind profile radar of Xiaoshan station in Zhejiang province from 2015 to 2018, and the L-band up-air meteorological sounding data of Hangzhou station was evaluated . The influence of the different data source and location of the two devices and the non-directional drift of the sounding balloon on the evaluation result is reduced by selecting the profile of the drift of the balloon to the wind profile radar. The results show that there is no significant difference between the wind profile radar and L-band radar sounding in the absence of precipitation at the height of 1~55 km. The correlation coefficient of the two observed u component in the height range is 0.95, the mean absolute bias and root mean square error are 1.47 and 2.29 m·s^-1 respectively, and the three statistics of the v component are 0.87, 1.52 and 2.12 m·s^-1 respectively. However, the correlation coefficient of the two observed u component and v component under 1 km is about 0.5, and the root mean square error reaches 2~8 m·s^-1. Considering the instability of the near-stratigraphic wind and the sampling scheme, these results are less reliable. Besides, there is no significant difference between the statistical results with or without precipitation.