气候变化领域集成服务门户(CCPortal): A Preliminary Study on the Organizational Modes of Mesoscale Convective Systems Associated With Warm-Sector Heavy Rainfall in South China

CCPortal

DOI	10.1029/2021JD034587
	A Preliminary Study on the Organizational Modes of Mesoscale Convective Systems Associated With Warm-Sector Heavy Rainfall in South China
	Li S.; Meng Z.; Wu N.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:16
英文摘要	This work examines the organizational modes of mesoscale convective systems (MCSs) associated with warm-sector heavy rainfall events in South China based on composite radar reflectivities during April–June from 2007 to 2020. The results showed that these MCSs can be classified into the nonlinear mode (NL) and eight linear modes: trailing stratiform precipitation (TS), no stratiform precipitation (NS), leading stratiform precipitation (LS), parallel stratiform precipitation (PS), embedded lines (EL), bow echoes (BE), training line/adjoining stratiform (TL/AS), and multiple rain bands (MRB). The NL mode accounts for 40% of the total, while linear modes account for 60%, with the TS mode being the most frequent linear mode. The detailed features of the top three most frequent organizational modes (NL, TS, and NS) were examined in this work. First, the MCSs of the top three organizational modes have different formation modes. Eighty-four percent of NL systems and 77% of TS systems form via the broken areal mode, while 83% of NS systems form via the broken line mode. Second, relative to TS and NS systems, NL systems develop faster and have shorter lifespans but slower movements with higher 3-h and 6-h maximum precipitation values. Third, environmental analysis indicates that the Total Totals index (TTI) is significantly different among all the top three organizational modes, with the highest value in TS mode and the lowest value in NS mode. These features are apparently different from their counterparts in central East China due to different synoptic environments. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	environment; MCS; organization; South China; warm-sector rainfall; wind shear
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237113
作者单位	Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Key Laboratory of Regional Numerical Weather Prediction, Institute of Tropical and Marine Meteorology, Chinese Meteorological Administration, Guangzhou, China
推荐引用方式 GB/T 7714	Li S.,Meng Z.,Wu N.. A Preliminary Study on the Organizational Modes of Mesoscale Convective Systems Associated With Warm-Sector Heavy Rainfall in South China[J],2021,126(16).
APA	Li S.,Meng Z.,&Wu N..(2021).A Preliminary Study on the Organizational Modes of Mesoscale Convective Systems Associated With Warm-Sector Heavy Rainfall in South China.Journal of Geophysical Research: Atmospheres,126(16).
MLA	Li S.,et al."A Preliminary Study on the Organizational Modes of Mesoscale Convective Systems Associated With Warm-Sector Heavy Rainfall in South China".Journal of Geophysical Research: Atmospheres 126.16(2021).