气候变化领域集成服务门户(CCPortal): Indispensable Role of the Madden-Julian Oscillation in the 2019 Extreme Autumn Drought Over Eastern China

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DOI	10.1029/2020JD034123
	Indispensable Role of the Madden-Julian Oscillation in the 2019 Extreme Autumn Drought Over Eastern China
	Qi L.; Ji Y.; Zhang W.
发表日期	2021
ISSN	2169897X
卷号	126 期号:6
英文摘要	Eastern China suffered an extensive drought during autumn (September–October 2019) with precipitation deficits reaching as high as 70% of the climatology, the worst on record since the 1980s. Concurrent with this extreme drought, the tropical Indo–Pacific oceans experienced a central–Pacific (CP) El Niño event with the westernmost location, and the third–ranking positive Indian Ocean Dipole (IOD) event. However, the CP El Niño associated convection anomalies are unexpectedly absent over the western equatorial Pacific, leading to the decoupling of traditional atmospheric–oceanic connections between the tropical Pacific and Indian Oceans. A strong Madden–Julian oscillation (MJO) event stayed in the western Indian Ocean for 32 days during September–October 2019, nearly triple the frequency of climatology. This extraordinary long–lasting MJO activity suppressed the western Pacific convection associated with the CP El Niño and simultaneously enhanced the local IOD–related sea surface temperature anomalies via the atmospheric forcing. The MJO associated convection over the Indian Ocean can excite an anomalous cyclone in the western North Pacific, producing persistently extensive precipitation deficiencies over eastern China. It highlights that the abnormal MJO activity plays a crucial role on the Indo–Pacific atmospheric–oceanic features and the extreme precipitation deficits over eastern China. © 2021. The Authors.
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/185393
作者单位	Key Laboratory of Meteorological Disaster of Ministry of Education (KLME), Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China
推荐引用方式 GB/T 7714	Qi L.,Ji Y.,Zhang W.. Indispensable Role of the Madden-Julian Oscillation in the 2019 Extreme Autumn Drought Over Eastern China[J],2021,126(6).
APA	Qi L.,Ji Y.,&Zhang W..(2021).Indispensable Role of the Madden-Julian Oscillation in the 2019 Extreme Autumn Drought Over Eastern China.Journal of Geophysical Research: Atmospheres,126(6).
MLA	Qi L.,et al."Indispensable Role of the Madden-Julian Oscillation in the 2019 Extreme Autumn Drought Over Eastern China".Journal of Geophysical Research: Atmospheres 126.6(2021).