气候变化领域集成服务门户(CCPortal): Roles of Double Low-Level Jets in the Generation of Coexisting Inland and Coastal Heavy Rainfall Over South China During the Presummer Rainy Season

CCPortal

DOI	10.1029/2020JD032890
	Roles of Double Low-Level Jets in the Generation of Coexisting Inland and Coastal Heavy Rainfall Over South China During the Presummer Rainy Season
	Liu X.; Luo Y.; Huang L.; Zhang D.-L.; Guan Z.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	In this study, the key dynamic factors influencing the formation of six heavy-rainfall events with coexisting inland and coastal rainfall over south China during May–June 2011–2017 are investigated using global ensemble forecasts from the European Centre for Medium-Range Weather Forecasts. An ensemble sensitivity analysis and comparisons between the identified good and bad members are conducted. Results confirm the importance of the synoptic low-level jet (SLLJ) and boundary layer jet (BLJ), but with different contributions, in determining the generation of the inland and coastal rainbelts, respectively. The inland heavy rainfall is closely related to both the SLLJ and BLJ, especially their meridional wind components. The more intense cold or quasi-stationary front, low-level vortex, or shear line accompanied by the stronger geostrophic southerly winds within both jets over inland and coastal south China is, the more rainfall over the inland region is favored. The ageostrophic southerly winds of the BLJ make limited contributions to the inland rainfall production but exert greater impacts on the generation of extreme (yet localized) coastal rainfall. The geostrophic meridional winds and associated low-level front/vortex also play a nonnegligible but indispensable role in producing the coastal rainfall. These findings add to our knowledge of heavy rainfall in the East Asian monsoon region. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	boundary layer jet; coastal warm-sector heavy rainfall; inland synoptic heavy rainfall; synoptic low-level jet
语种	英语
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/185756
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Nanjing Joint Institute for Atmospheric Sciences, Chinese Academy of Meteorological Sciences, Nanjing, China; Key Laboratory of Transportation Meteorology, China Meteorological Administration, Nanjing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Institute of Tropical and Marine Meteorology, Chinese Meteorological Administration, Guangzhou, China; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States
推荐引用方式 GB/T 7714	Liu X.,Luo Y.,Huang L.,et al. Roles of Double Low-Level Jets in the Generation of Coexisting Inland and Coastal Heavy Rainfall Over South China During the Presummer Rainy Season[J],2020,125(18).
APA	Liu X.,Luo Y.,Huang L.,Zhang D.-L.,&Guan Z..(2020).Roles of Double Low-Level Jets in the Generation of Coexisting Inland and Coastal Heavy Rainfall Over South China During the Presummer Rainy Season.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Liu X.,et al."Roles of Double Low-Level Jets in the Generation of Coexisting Inland and Coastal Heavy Rainfall Over South China During the Presummer Rainy Season".Journal of Geophysical Research: Atmospheres 125.18(2020).