气候变化领域集成服务门户(CCPortal): Nonlinear Damping of ITCZ Migrations Due to Ekman Ocean Energy Transport

CCPortal

DOI	10.1029/2019GL086445
	Nonlinear Damping of ITCZ Migrations Due to Ekman Ocean Energy Transport
	Afargan-Gerstman H.; Adam O.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:5
英文摘要	The role of tropical wind-driven ocean circulation in setting the position of the Intertropical Convergence Zone (ITCZ) is studied using an atmospheric model coupled to a slab ocean with parameterized Ekman energy transport. Unlike previous studies, the parameterized cross-equatorial ocean energy transport, which is critical for the coupled response, is explicitly represented as the curl of the wind stress at the equator. A nonlinear sensitivity of the ITCZ position to hemispherically asymmetric heating and ocean stratification is seen, which is primarily linked to the partitioning of cross-equatorial energy transport between (i) the atmosphere and ocean and (ii) atmospheric mean and transient eddy components. Due to the nonmonotonic response of transient eddies to the asymmetric heating, amplified or damped response is possible. The common assumption of a linear relation between the ITCZ position and hemispherically asymmetric heating is therefore found to be inadequate when large climatic variations are considered. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Carrier concentration; Damping; Oceanography; Asymmetric heating; Atmospheric energy; Coupled modeling; Ekman transport; Energy fluxes; Intertropical convergence zone; Non-monotonic response; Ocean stratification; Atmospheric movements; air-sea interaction; atmosphere-ocean coupling; atmospheric transport; Ekman transport; energy flux; heating; model; stratification; wind stress
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170621
作者单位	Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University, Jerusalem, Israel; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Afargan-Gerstman H.,Adam O.. Nonlinear Damping of ITCZ Migrations Due to Ekman Ocean Energy Transport[J],2020,47(5).
APA	Afargan-Gerstman H.,&Adam O..(2020).Nonlinear Damping of ITCZ Migrations Due to Ekman Ocean Energy Transport.Geophysical Research Letters,47(5).
MLA	Afargan-Gerstman H.,et al."Nonlinear Damping of ITCZ Migrations Due to Ekman Ocean Energy Transport".Geophysical Research Letters 47.5(2020).