CONVERGENCE FEEDBACK AND UNSTABLE LOW-FREQUENCY OSCILLATIONS IN A SIMPLE COUPLED OCEAN-ATMOSPHERE MODEL

被引：8

作者：

GOSWAMI, BN ^{[1
]}

SELVARAJAN, S ^{[1
]}

机构：

[1] INDIAN INST SCI,DEPT AEROSP ENGN,BANGALORE 560012,KARNATAKA,INDIA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1991年 / 18卷 / 06期

关键词：

D O I：

10.1029/91GL00968

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The role of convergence feedback on the stability of a coupled ocean - atmosphere system is studied using model III of Hirst (1986). It is shown that the unstable coupled mode found by Hirst is greatly modified by the convergence feedback. If the convergence feedback strength exceeds a critical value, several new unstable intraseasonal modes are also introduced. These modes have very weak dependence on the wave number. These results may explain the behaviour of some coupled models and to some extent provide a mechanism for the observed aperiodicity of the El-Nino and Southern Oscillation (ENSO) events.

引用

页码：991 / 994

页数：4

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