气候变化领域集成服务门户(CCPortal): Cloud and Precipitation Properties of MCSs Along the Meiyu Frontal Zone in Central and Southern China and Their Associated Large-Scale Environments

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DOI	10.1029/2019JD031601
	Cloud and Precipitation Properties of MCSs Along the Meiyu Frontal Zone in Central and Southern China and Their Associated Large-Scale Environments
	Cui W.; Dong X.; Xi B.; Liu M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:6
英文摘要	This study focuses on investigating the cloud and precipitation features of Meiyu mesoscale convective systems (MCSs) and their relation to the large-scale environments in central and southern China using satellite observations and reanalysis data during the period 2014–2018. MCSs from two different locations, the Yangtze River Basin (YRB) and Southern China (SC), are examined separately. The Meiyu MCSs have a mean precipitation rate of 3.6 mm/hr and contribute 20% to 60% of the total precipitation during the Meiyu period. The diurnal cycle of Meiyu MCSs shows a maximum precipitation amount in the morning, which is associated with the enhanced nocturnal low-level jet (LLJ) overnight. Although the synoptic setups in YRB and SC are found to be similar when normalized around the MCS initiation locations, MCSs exhibit some differences in terms of the cloud top height, precipitation rate, and duration, which are likely by the differences in the local forcing. Large interannual variations are found in MCSs' number, cloud size, lifetime, and rainfall intensity, which is found to be associated with the interannual variabilities in the large-scale environments. By comparing the large-scale environments with climatological mean states, we find that the year with the most intense MCS activity during the study period is characterized by an intensified southwesterly LLJ, which increases the moisture transport from the Indian Ocean and an enhancement of the midtropospheric westerly jet, which induces adiabatic ascent along the Meiyu front, creating more favorable conditions for convection. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	extreme precipitation; MCS precipitation; Meiyu rainfall
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/186109
作者单位	Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Wuhan Regional Climate Center, China Meteorological Administration, Wuhan, China
推荐引用方式 GB/T 7714	Cui W.,Dong X.,Xi B.,et al. Cloud and Precipitation Properties of MCSs Along the Meiyu Frontal Zone in Central and Southern China and Their Associated Large-Scale Environments[J],2020,125(6).
APA	Cui W.,Dong X.,Xi B.,&Liu M..(2020).Cloud and Precipitation Properties of MCSs Along the Meiyu Frontal Zone in Central and Southern China and Their Associated Large-Scale Environments.Journal of Geophysical Research: Atmospheres,125(6).
MLA	Cui W.,et al."Cloud and Precipitation Properties of MCSs Along the Meiyu Frontal Zone in Central and Southern China and Their Associated Large-Scale Environments".Journal of Geophysical Research: Atmospheres 125.6(2020).