贵州威宁边界层风廓线雷达与L波段探空雷达的风向风速一致性初探

利用2019年6月至12月威宁县边界层风廓线雷达数据和威宁探空数据，预设二者风速偏差<=3m/s、风向偏差<=20°为有效数据样本，研究两者在不同风速、风向范围和不同高度、时次、降水条件下风向、风速数据对比及相关性分析。结果表明：（1）风廓线雷达和探空的风速、风向均具有较好的正向相关性；（2）在不同高度下，且无论有无降水或任意时次，风速有效样本比率大体上高于风向有效样本比率，500米左右高度以下有效样本比率总是最小（不足50%），而中高层较大；（3）不同时次对风速、风向数据有效性影响不大；（4）有降水时风速、风向有效样本比率比无降水时偏小且变化剧烈；（5）除东北（20°-40°）和西南（200°-260°）风向外，其他方位风向数据一致性较差；（6）除大于24m/s的风速外其他大小风速均具有较好的一致性。

A Preliminary Study on the Consistency of Wind Direction and Wind Speed between Boundary Layer Wind Profile Radar and L-Band Altitude Detection Radar in Weining county of Guizhou province

Using the boundary layer wind profiler radar and the high altitude detection system wind field data from June to December 2019 in Weining County, the valid data samples are pre-set with the wind speed deviation <=3m/s and the wind direction deviation <=20 degrees. The comparison and correlation analysis of the wind direction and wind speed data under different wind speed, wind direction range and different height, time, precipitation conditions are studied. The results show that: (1) Wind profiling radar and altitude detection system have good positive correlation in wind speed and direction; (2) At different heights, the ratio of effective samples of wind speed is higher than that of effective samples of wind direction, with or without precipitation or at any time. The ratio of effective samples below 500 meters is always the smallest (less than 50%) and the middle and upper levels are larger. (3) Different times have little effect on the validity of wind speed and direction data; (4) The effective sample ratio of wind speed and direction with precipitation is smaller and more variable than that without precipitation; (5) The consistency of wind direction data in other directions is poor except for the Northeast (20-40 degrees) and southwest (200-260 degrees). (6) All the wind speeds except those larger than 24m/s have good consistency.