Eastward-moving convection-enhanced modons in shallow water in the equatorial tangent plane

被引：31

作者：

Rostami, M. ^{[1
,2
,3
]}

Zeitlin, V. ^{[1
,2
]}

机构：

[1] Sorbonne Univ, LMD, 24 Rue Lhomond, F-75005 Paris, France

[2] Ecole Normale Super, 24 Rue Lhomond, F-75005 Paris, France

[3] Univ Cologne, Inst Geophys & Meteorol IGM, Cologne, Germany

来源：

PHYSICS OF FLUIDS | 2019年 / 31卷 / 02期

关键词：

WAVE;

D O I：

10.1063/1.5080415

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We report a discovery of steady long-living slowly eastward moving large-scale coherent twin cyclones, the equatorial modons, in the shallow water model in the equatorial beta-plane, the archetype model of the ocean and atmosphere dynamics in tropics. We start by constructing analytical asymptotic modon solutions in the non-divergent velocity approximation and then show by simulations with a high-resolution numerical scheme that such configurations evolve into steady dipolar solutions of the full model. In the atmospheric context, the modons persist in the presence of moist convection, being accompanied and enhanced by specific patterns of water-vapour condensation. Published under license by AIP Publishing.

引用

页数：7