气候变化领域集成服务门户(CCPortal): Changes in ENSO-monsoon relations from early to recent decades during onset; peak and withdrawal phases of Indian summer monsoon

CCPortal

DOI	10.1007/s00382-020-05335-x
	Changes in ENSO-monsoon relations from early to recent decades during onset; peak and withdrawal phases of Indian summer monsoon
	Hrudya P.H.; Varikoden H.; Vishnu R.; Kuttippurath J.
发表日期	2020
ISSN	0930-7575
起始页码	1457
结束页码	1471
卷号	55
英文摘要	The El Niño Southern Oscillation (ENSO) is an important coupled ocean–atmosphere phenomenon in the tropical Pacific and an important modulator of the spatio-temporal variability of Indian summer monsoon rainfall (ISMR). Here, we explore the impact of ENSO during onset (June), peak (July–August) and withdrawal (September) phases of ISMR for the period 1951–2015, by studying the changes in the ENSO-monsoon relationship from early decades (1951–1980) to recent decades (1986–2015). We observe noticeable changes in the ENSO-monsoon relationship from the early to recent decades during all the three phases. During El Niño events, rainfall over most of the Indian regions is significantly increased in recent decades during onset phase, but a significant decrease in rainfall is observed during peak and withdrawal phases. On the other hand, the rainfall during La Niña events is significantly decreased over the monsoon core zone of India during all the three phases. A significant increase (decrease) in sea surface temperature (SST) is observed over the central equatorial Pacific and Indian Ocean during El Niño (La Niña) events in recent decades. These changes differ from one phase to another and related to the observed rainfall patterns over the Indian region. Apart from these, the changes in the anomalies of low level circulation and Walker circulation over the Indo-Pacific domain are also linked to the changes in rainfall during the ENSO events, with most significant relationship during the onset phase. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Circulation changes; ENSO-monsoon relationship; Indian Ocean SST; Rainfall variability
语种	英语
scopus关键词	atmosphere-ocean coupling; El Nino-Southern Oscillation; La Nina; monsoon; rainfall; sea surface temperature; spatiotemporal analysis; Walker circulation; Indian Ocean; Pacific Ocean; Pacific Ocean (Equatorial); Pacific Ocean (Tropical)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145355
作者单位	Department of Physics, Sree Krishna College, Affiliated to University of Calicut, Guruvayoor, Kerala, India; Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, 411008, India; CORAL, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
推荐引用方式 GB/T 7714	Hrudya P.H.,Varikoden H.,Vishnu R.,et al. Changes in ENSO-monsoon relations from early to recent decades during onset; peak and withdrawal phases of Indian summer monsoon[J],2020,55.
APA	Hrudya P.H.,Varikoden H.,Vishnu R.,&Kuttippurath J..(2020).Changes in ENSO-monsoon relations from early to recent decades during onset; peak and withdrawal phases of Indian summer monsoon.Climate Dynamics,55.
MLA	Hrudya P.H.,et al."Changes in ENSO-monsoon relations from early to recent decades during onset; peak and withdrawal phases of Indian summer monsoon".Climate Dynamics 55(2020).