空气动力学学报2019，Vol.37Issue(1)：43-54,12.DOI:10.7638/kqdlxxb-2018.0297
超强台风山竹近地层外围风速剖面演变特性现场实测
Observation-based study for the evolution of vertical wind profiles in the boundary layer during super typhoon Mangkhut
赵林 1杨绪南 2方根深 1崔巍 1宋丽莉 1葛耀君3
作者信息
- 1. 同济大学 土木工程防灾国家重点实验室,上海 200092
- 2. 同济大学 桥梁结构抗风技术交通行业重点实验室,上海 200092
- 3. 中国气象局 公共气象服务中心,北京 100081
- 折叠
摘要
Abstract
The Doppler LiDAR was used to measure the periphery wind field of super typhoon ‘Mangkhut’in Xuwen-the north shore of Qiongzhou Strait.The measurement lasted from 12:28 on September 1 5th,2018 to 13:53 on September 1 7th,2018,during which the evolution of wind speed profiles on the boundary layer was obtained from 29 hours before the landfall of the typhoon to 2 1 hours after its landfall.The evolution of wind speed profiles of the typhoon is summarized into 4 periods:low-speed-wind period,strong wind shear period before landfall,low-level j et period,and typhoon-far-away period.It is found that,there are 2 types of wind profiles which are different from monsoon:the S shape profile and anti-C shape profile;within the range of 2 30 km～7 50 km from the center of the typhoon,the maximum wind speed height increases first and then decreases with the increasing distance between the observation site and the typhoon center;the average maximum wind speed height and average power law exponent are respectively,about 360 m and 0.41 before the typhoon landfall,while the values change to 800 m and 0.28 after the landfall;Vickery empirical model was used to fit the S shape profiles and the anti-C shape profiles,and the results indicate that,the Vickery model can reproduce the anti-C shape of the hurricane boundary layer (i.e.low-level j et)but can not the S shape profiles.关键词
台风/远端风场/边界层/实测/风剖面/演变过程Key words
typhoon/periphery wind field/boundary layer/measurement/wind profile/evolution分类
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赵林,杨绪南,方根深,崔巍,宋丽莉,葛耀君..超强台风山竹近地层外围风速剖面演变特性现场实测[J].空气动力学学报,2019,37(1):43-54,12.
