| Moisture Transport and Associated Background Circulation for the Regional Extreme Precipitation Events over South China in Recent 40 Years |
| |
| 作者姓名： | 杨雯婷 傅慎明 孙建华 汪汇洁 付亚男 曾垂宽 |
| |
| 作者单位： | 1. Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences;2. University of Chinese Academy of Sciences;3. International Center for Climate and Environment Sciences, Institute of Atmospheric Physics,Chinese Academy of Sciences;4. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai);5. China Resources Power Technology Research Institute Co., Ltd |
| |
| 基金项目： | National Key Research and Development Program of China (2019YFC1510400)；;National Natural Science Foundation of China (42075002)； |
| |
| 摘 要： | Based on the hourly precipitation data at 176 observational stations over south China and the hourly ERA5reanalysis data during the 40-yr period of 1981-2020, we analyzed the universal characteristics of moisture transport and their associated background circulations for four types of regional extreme precipitation events(REPEs) over south China. Main findings are shown as follow.(i) The wind that transported moisture for the REPEs over south China featured a notable diurnal variation, which was...
|
| 关 键 词： | regional extreme precipitation event south China moisture transport composite analysis backward tracking analyses |
| 收稿时间： | 2022-09-21 |
Moisture Transport and Associated Background Circulation for the Regional Extreme Precipitation Events over South China in Recent 41 Years |
| |
| YANG Wen-ting,FU Shen-ming,SUN Jian-hu,WANG Hui-jie,FU Ya-nan and ZENG Chui-kuan.Moisture Transport and Associated Background Circulation for the Regional Extreme Precipitation Events over South China in Recent 40 Years[J].Journal of Tropical Meteorology,2023,29(1):101-114. |
| |
| Authors: | YANG Wen-ting FU Shen-ming SUN Jian-hu WANG Hui-jie FU Ya-nan and ZENG Chui-kuan |
| |
| Institution: | 1. Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy
of Sciences, Beijing 100029 China; 2. University of Chinese Academy of Sciences, Beijing 100050 China,International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100030 China,1. Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academyof Sciences, Beijing 100029 China; 2. University of Chinese Academy of Sciences, Beijing 100049 China;4. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong 519001 China,Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 China,1. Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy
of Sciences, Beijing 100029 China; 2. University of Chinese Academy of Sciences, Beijing 100050 China and China Resources Power Technology Research Institute Co., Ltd, Shenzhen, Guangdong 518001 China |
| |
| Abstract: | Based on the hourly precipitation data at 176 observational stations over south China and the hourly ERA5
reanalysis data during the 40-yr period of 1981-2020, we analyzed the universal characteristics of moisture transport and
their associated background circulations for four types of regional extreme precipitation events (REPEs) over south
China. Main findings are shown as follow. (i) The wind that transported moisture for the REPEs over south China
featured a notable diurnal variation, which was consistent with the variations of the precipitation. (ii) Four types of
REPEs could be determined, among which the southwest type (SWT) and the southeast type (SET) accounted for ~92%
and ~5.7%, respectively, ranking the first and second, respectively. (iii) Trajectory analyses showed that the air particles
of the SWT-REPEs had the largest specific humidity and experienced the most intense ascending motion, and therefore
their precipitation was the strongest among the four types. (iv) South China was dominated by notable moisture flux
convergence for the four types of REPEs, but their moisture transport was controlled by different flow paths. (v)
Composite analyses indicated that the background circulation of the four types of REPEs showed different features,
particularly for the intensity, location and coverage of a western Pacific subtropical high. For the SWT-REPEs, their
moisture transport was mainly driven by a lower-tropospheric strong southwesterly wind band in the low-latitude
regions. Air particles for this type of REPEs mainly passed over the Indochina Peninsula and South China Sea. For the
SET-REPEs, their moisture transport was mainly steered by a strong low-tropospheric southeasterly wind northeast of a
transversal trough. Air particles mainly passed over the South China Sea for this type of REPEs. |
| |
| Keywords: | regional extreme precipitation event south China moisture transport composite analysis backward tracking analyses |
|
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《热带气象学报(英文版)》下载免费的PDF全文 |
|
