Universität zu Köln

Rostami, M. and Zeitlin, V. (2019). Geostrophic adjustment on the equatorial beta-plane revisited. Phys. Fluids, 31 (8). MELVILLE: AMER INST PHYSICS. ISSN 1089-7666

Full text not available from this repository.

Abstract

The process of geostrophic adjustment of localized large-scale pressure anomalies in the standard adiabatic shallow-water model on the equatorial beta-plane is revisited, and it is shown that the standard scenario of generation of westward-moving Rossby and eastward-moving Kelvin waves, which underlies the classical Gill theory of tropical circulation due to a localized heating, is not unique. Depending on the strength and aspect ratio of the initial perturbation, the response to the initial perturbation in the western sector can be dominated by inertia-gravity waves. The adjustment in the diabatic moist-convective shallow water model can be totally different and produces, depending on parameters, either Gill-like response or eastward-moving coherent dipolar structures of the type of equatorial modons, which do not appear in the dry adjustment, or vortices traveling, respectively, northwest in the Northern and southwest in the Southern hemispheres. Published under license by AIP Publishing.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rostami, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zeitlin, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-145258
DOI:	10.1063/1.5110441
Journal or Publication Title:	Phys. Fluids
Volume:	31
Number:	8
Date:	2019
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1089-7666
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Mechanics; Physics, Fluids & Plasmas Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14525