Analysis of Vertical Characteristics of shallow wind in Northeast of Horqin Grassland

¹ 63968 Unit of PLA, Baicheng 137001;
² State Key Laboratory of NBC Protection for Civilian, Beijing 102205

^* shl@pku.edu.cn

Abstract

In the present study, an investigation was conducted into the characteristics of variation in shallow wind across the northeast Horqin grassland by using the wind tower data from 2016 to 2020. The investigative results demonstrate that northwest wind is dominant at the layers of 3.5-101m, followed by southwest wind and southeast wind in order. In spring, the different wind direction accounts for the same proportion. In summer, southwest and northeast winds are dominant. West wind and northwest wind prevail in autumn. In winter, northwest wind is in dominance. With the increase in height, the frequency of each wind speed becomes dispersed. The horizontal wind speed is mostly 2-4m/s at the layer of low than 20m and 5-6m/s at the layer of over 34m. In general, there is downdraft at the layer of 10 m and updraft at the layer of 55m and 101 m, respectively.