气候变化领域集成服务门户(CCPortal): Decadal modulation of the relationship between intraseasonal tropical variability and ENSO

CCPortal

DOI	10.1007/s00382-018-4235-y
	Decadal modulation of the relationship between intraseasonal tropical variability and ENSO
	Gushchina D.; Dewitte B.
发表日期	2019
ISSN	0930-7575
起始页码	2091
结束页码	2103
卷号	52 期号:2020-03-04
英文摘要	The El Niño Southern Oscillation (ENSO) amplitude is modulated at decadal timescales, which, over the last decades, has been related to the low-frequency changes in the frequency of occurrence of the two types of El Niño events, that is the Eastern Pacific (EP) and Central Pacific (CP) El Niños. Meanwhile ENSO is tightly linked to the intraseasonal tropical variability (ITV) that is generally enhanced prior to El Niño development and can act as a trigger of the event. Here we revisit the ITV/ENSO relationship taking into account changes in ENSO properties over the last six decades. The focus is on two main components of ITV, the Madden–Julian Oscillation (MJO) and convectively coupled equatorial Rossby waves (ER). We show that the ITV/ENSO relationship exhibits a decadal modulation that is not related in a straight-forward manner to the change in occurrence of El Niño types and Pacific decadal modes. While enhanced MJO activity associated to EP El Niño development mostly took place over the period 1985–2000, the ER activity is enhanced prior to El Niño development over the whole period with a tendency to relate more to CP El Niño than to EP El Niño. In particular the relationship between ER activity and ENSO was particularly strong for the period 2000–2015, which results in a significant positive long-term trend of the predictive value of ER activity. The statistics of the MJO and ER activity is consistent with the hypothesis that they can be considered a state-dependent noise for ENSO linked to distinct lower frequency climate modes. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Decadal modulation; El Niño; Intraseasonal tropical variability
语种	英语
scopus关键词	air-sea interaction; convective system; decadal variation; El Nino; El Nino-Southern Oscillation; equatorial wave; Madden-Julian oscillation; Pacific Decadal Oscillation; Rossby wave; trend analysis; tropical environment; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (East); Israel turkey meningoencephalomyelitis virus
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/146551
作者单位	Faculty of Geography, Moscow State University, Leninskie gory, 1, Moscow, Russian Federation; Centro de Estudios Avanzado en Zonas Áridas (CEAZA), La Serena, Chile; Departamento de Biología, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile; Millennium Nucleus for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Coquimbo, Chile; Laboratoire d’Etudes en Géophysique et Océanographie Spatiales, Toulouse, France
推荐引用方式 GB/T 7714	Gushchina D.,Dewitte B.. Decadal modulation of the relationship between intraseasonal tropical variability and ENSO[J],2019,52(2020-03-04).
APA	Gushchina D.,&Dewitte B..(2019).Decadal modulation of the relationship between intraseasonal tropical variability and ENSO.Climate Dynamics,52(2020-03-04).
MLA	Gushchina D.,et al."Decadal modulation of the relationship between intraseasonal tropical variability and ENSO".Climate Dynamics 52.2020-03-04(2019).