A Case Study on the Impact of Boundary Layer Turbulence on Convective Clouds in the Eastern Margin of the Tibetan Plateau

被引：0
作者：
Wang, Ting [1 ]
Li, Maoshan [1 ]
Jiang, Yonghao [1 ]
Liu, Yuchen [1 ]
Gong, Ming [2 ]
Wang, Shaoyang [1 ]
Sun, Peng [1 ]
Ma, Yaoming [3 ]
Sun, Fanglin [4 ]
机构：
[1] Chengdu Univ Informat Technol, Sch Atmospher Sci, Plateau Atmosphere & Environm Key Lab Sichuan Prov, Chengdu Plain Urban Meteorol & Environm Observat &, Chengdu 610225, Sichuan, Peoples R China
[2] Meteorol Bur Changde City, Changde 415000, Peoples R China
[3] Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Ctr Excellence Tibetan Plateau Earth Sci, Key Lab Tibetan Environm Changes & Land Surface Pr, Beijing 100101, Peoples R China
[4] Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Peoples R China
来源：
REMOTE SENSING | 2024年 / 16卷 / 23期
基金：
中国国家自然科学基金;
关键词：
precipitation; raindrop spectra; weather analysis; convective clouds; Tibetan Plateau;
D O I：
10.3390/rs16234376
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, we utilized ECMWF Reanalysis of the Global Climate at Atmospheric Resolution 5 (ERA5) data, FengYun-4B satellite (FY-4B) data, a Wind3D 6000 Three-Dimensional Scanning Laser Wind Radar, and raindrop spectrum data to analyze the circulation background, convective cloud changes, boundary layer wind field variations, and precipitation drop size spectrum characteristics of a severe convective rainfall process that occurred on 3 April 2024 in the eastern margin of the Tibetan Plateau. The findings indicated the following: (1) The rain belt of this precipitation event showed a southwest-northeast trend. During the vigorous development of convection, the rainfall intensity and total precipitation at the station increased, with a wider raindrop spectrum, and the raindrop spectrum of this precipitation process was unimodal. (2) On 3 April, the interaction between the eastward movement of the plateau trough at 500 hPa and the upper-level jet stream at 200 hPa in the eastern Tibetan Plateau and the Sichuan Basin area, along with the necessary conditions for precipitation, such as energy and moisture, led to severe convective rainfall. (3) This intense convective precipitation process was caused by the vigorous convective clouds that developed in the eastern part of the Tibetan Plateau. As these clouds developed and moved eastward out of the plateau, they precipitated with increased turbulence intensity at the station, leading to the generation of intense convective activities at the site. (4) One hour before the precipitation, there were significant increases in horizontal wind speed, vertical air velocity, and turbulence intensity within the boundary layer, and there were also significant changes in the horizontal wind direction. The results obtained can provide important theoretical references for the prediction of severe convective rainfall and the performance of numerical simulations thereon.
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页数：18
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