气候变化领域集成服务门户(CCPortal): On the Relationship Between the Madden-Julian Oscillation and the Hadley and Walker Circulations

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DOI	10.1029/2019JD032117
	On the Relationship Between the Madden-Julian Oscillation and the Hadley and Walker Circulations
	Schwendike J.; Berry G.J.; Fodor K.; Reeder M.J.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	This study investigates: (i) how the local meridional (Hadley) and zonal (Walker) circulations change in each phase of the Madden-Julian Oscillation (MJO); and (ii) the effect of enhanced and suppressed MJO-related convection on the poleward extent of the local Hadley circulations and, thus, the strengths and positions of the subtropical jets. We examine these effects in ERA-Interim reanalysis by decomposing the vertical mass flux into zonal and meridional components. We show for the first time, that as the envelope of enhanced convection moves eastwards from Africa to the Central Pacific the local Hadley circulation is enhanced. The regional Walker circulation in the Pacific is strengthened when the envelope of active MJO convection is located over the Maritime Continent and weakened when the region of suppressed convection is located there. In regions of anomalous upper-level divergence the subtropical jet is enhanced. The core of the subtropical jet over Asia shifts eastwards with the progression of the MJO and shifts farther poleward in regions of anomalous upper-level divergence linked with enhanced convection. The region of either enhanced or suppressed convection over the Maritime Continent strengthens or weakens the local Hadley circulation, producing disturbances in the subtropical jet. These disturbances then force midlatitude Rossby waves that propagate across the Pacific Ocean in both hemispheres. © 2021. The Authors.
英文关键词	Hadley circulation; Madden-Julian Oscillation; midlatitude jet; Rossby waves; Walker 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/185484
作者单位	School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Max-Planck Institut für Meteorologie, Hamburg, Germany; School of Earth, Atmosphere and Environment and the ARC Centre of Excellence for Climate Extremes, Monash University, Melbourne, VIC, Australia
推荐引用方式 GB/T 7714	Schwendike J.,Berry G.J.,Fodor K.,et al. On the Relationship Between the Madden-Julian Oscillation and the Hadley and Walker Circulations[J],2021,126(4).
APA	Schwendike J.,Berry G.J.,Fodor K.,&Reeder M.J..(2021).On the Relationship Between the Madden-Julian Oscillation and the Hadley and Walker Circulations.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Schwendike J.,et al."On the Relationship Between the Madden-Julian Oscillation and the Hadley and Walker Circulations".Journal of Geophysical Research: Atmospheres 126.4(2021).