Abstract:Based on the wind field observations with the coherent Doppler wind lidar in August 2018 in Dezhou, Shandong, low-level jets (LLJs) are judged, identified, and statistically analyzed. The LLJ identification and statistics are conducted using 10-min averaged wind profile data below 1 500 m based on BONNER's criteria for judging LLJ and the frequency of LLJ is 3.6%. With reference to ZHANG Shifeng's criteria for judging LLJ, the speed, height, direction, and shear of LLJ are calculated using 10-min averaged wind profile below 350 m and the occurrence frequency reaches 24.9%. The jet speed is mainly between 6 and 10 m·s-1 and wind directions are mainly easterly and southerly. There are three peaks of jet height, which are located at about 110 m, 160 m and 220 m. It shows that Doppler wind lidar can effectively get wind profile data of high spatial resolution and thus detect the existence and characteristics of LLJ.