Arid Zone Research ›› 2022, Vol. 39 ›› Issue (4): 1047-1055.doi: 10.13866/j.azr.2022.04.06

• Weather and Applied Climate • Previous Articles     Next Articles

Movement paths and characteristics of hail clouds in Bayannur, Inner Mongolia

YU Shuiyan1,2,3,4(),BI Lige2,3,4(),SU Lijuan2,3,4,LIU Jidong5,SHI Jinli2,3,4,YI Na’na2,3,4,FAN Ruxia2,3,4,XU Zhili2,3,4   

  1. 1. Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China
    2. Key Laboratory for Cloud Physics of China Meteorological Administration, Beijing 100081, China
    3. Meteorological Science Institute of Inner Mongolia, Hohhot 010051, Inner Mongolia, China
    4. Inner Mongolia Key Laboratory of Weather Modification, Hohhot 010051, Inner Mongolia, China
    5. Bayannur Meteorological Bureau, Bayannur 015006, Inner Mongolia, China
  • Received:2021-11-11 Revised:2022-03-23 Online:2022-07-15 Published:2022-09-26
  • Contact: Lige BI E-mail:330579259@qq.com;54551072@qq.com

Abstract:

Bayannur is an important agricultural and animal husbandry production area. The ecological environment in this area is highly sensitive. In addition, hail frequently occurs in this area. This paper used the manual records of 67 ground anti-hail operation sites in Bayannur, western Inner Mongolia, from 2009 to 2019 and the weather radar data of Linhe Station to statistically analyze the movement paths and characteristics of hail clouds in this area. Results showed that the moving paths of hail clouds in Bayannur in the past 11 years were primarily northwest, southwest, and west. The occurrence frequency of hail cloud in the northwest route was the highest (46.70%), and its moving distance during the heavy hailstorm phase was the longest (23.86 km). Moreover, the duration of the heavy hailstorm was longer (40.25 min). In summer (June-August), the impact of hail disasters should be paid attention to. The hail cloud in July and August can develop in a short time (14.09 and 17.00 min) and a short moving distance (5.49 km and 8.48 km). In the mature stage, the movement slowly and continuously affected the cloud coverage. In this region, hail clouds are devastating during these months. The time period with the highest initial frequency of hail cloud source points was concentrated between 13:00 and 15:00, whereas hail primarily occurred between 14:00 and 17:00. The hail cloud and hail in Bayannur are primarily due to water vapor and dynamic hail, which can reach 79.44%. Under dynamic conditions, hail is primarily due to the northwest paths (68.57%), and under water vapor conditions, hail is primarily due to the northwest paths, southwest paths, and west paths (96.00%). The characteristics of the movement paths of the hail clouds in Bayannur in the past 11 years showed that the hail clouds along the northwest paths in summer were the most disastrous.

Key words: hail cloud, movement paths, hail, western Inner Mongolia