气候变化领域集成服务门户(CCPortal): Distinct Features of Atmospheric Rivers in the Early Versus Late East Asian Summer Monsoon and Their Impacts on Monsoon Rainfall

CCPortal

DOI	10.1029/2020JD033537
	Distinct Features of Atmospheric Rivers in the Early Versus Late East Asian Summer Monsoon and Their Impacts on Monsoon Rainfall
	Park C.; Son S.-W.; Kim H.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	Atmospheric river (AR) and its impact on monsoon rainfall in East Asia are investigated by considering their month-to-month variations during the East Asian summer monsoon (EASM). The AR in the EASM, defined as an anomalously enhanced plume-like water vapor transport, frequently forms over eastern China, Korea and western Japan. However, its characteristics vary from the early (June-July) to the late (August-September) period of the EASM. In the early EASM, AR is typically characterized by a quasi-stationary monsoon southwesterly along the northern boundary of the western North Pacific subtropical high (WNPSH), which is further intensified by a migrating extratropical cyclone in the north. In contrast, the late-EASM AR, which is less frequent than the early EASM AR, is primarily organized by a migrating extratropical cyclone. The quasi-stationary monsoon southwesterly is less influential as the northern boundary of the WNPSH shifts northward, being decoupled from the subtropical ocean. Both the early- and late-EASM ARs contribute substantially to monsoon rainfall, especially to heavy rainfall events. In the early EASM, 35%–70% of total rainfall amount and 60%–80% of heavy rainfall events in eastern China, Korea and western Japan are associated with AR. Although weakened, AR-related rainfall is still significant in the late EASM in Korea and western Japan. These results indicate that AR is a key ingredient of EASM precipitation and its subseasonal variations should be taken into account to better understand and predict AR-related extreme precipitation in East Asia. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric river; East Asian summer monsoon; monsoon rainfall; subseasonal climatology; synoptic circulation
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/185331
作者单位	School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, United States
推荐引用方式 GB/T 7714	Park C.,Son S.-W.,Kim H.. Distinct Features of Atmospheric Rivers in the Early Versus Late East Asian Summer Monsoon and Their Impacts on Monsoon Rainfall[J],2021,126(7).
APA	Park C.,Son S.-W.,&Kim H..(2021).Distinct Features of Atmospheric Rivers in the Early Versus Late East Asian Summer Monsoon and Their Impacts on Monsoon Rainfall.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Park C.,et al."Distinct Features of Atmospheric Rivers in the Early Versus Late East Asian Summer Monsoon and Their Impacts on Monsoon Rainfall".Journal of Geophysical Research: Atmospheres 126.7(2021).