%0 Journal Article %A Dan WU %A Meiqi LI %A Rui GUO %A Xiaowei JIA %A Hao LIU %A Quan LIU %T Low-level Wind Shear and Its Weather Situation at Shijiazhuang Zhengding International Airport from 2014 to 2017 %D 2021 %R 10.11755/j.issn.1006-7639(2021)-05-0775 %J Journal of Arid Meteorology %P 775-784 %V 39 %N 5 %X

Based on 31 aviation records of low-level wind shear, surface observational data at Shijiazhuang Zhengding international airport of Hebei Province and NCEP/NCAR reanalysis data from 2014 to 2017, the characteristics of low-level wind shear and corresponding weather situations were analyzed. The results show that the low-level wind shear mainly occurred in the afternoon and nightfall, with the peak at 14:00 BST. The majority of low-level wind shear events occurred in spring, and the low-level wind shear events occurred most in April. The number of low-level wind shear events at Zhengding international airport was the highest in 2015. The mainly weather situations which were conducive to occurrence of low-level wind shear events were northwest airflow type, vortex type, west wind trough type and horizontal trough type. Furthermore, low-level wind shear occurred most under the weather situation of northwest airflow type, especially in spring and winter. The convective weather under the vortex weather situation was prone to occurrence of low-level wind shear. In addition, more attention should be paid on 3 hours and 1 hour anallobaric and negative temperature variation under the northwest airflow weather situation, as well as allobaric and variable temperature in a short time under the vortex weather situation for forecasting low-level wind shear.

%U http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2021)-05-0775