Goswami, BN and Selvarajan, Sudha (1991) Convergence feedback and unstable low frequency oscillations in a simple coupled ocean‐atmosphere model. In: Geophysical Research Letters, 18 (6). pp. 991-994.
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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.
| Item Type: | Journal Article |
|---|---|
| Publication: | Geophysical Research Letters |
| Publisher: | Amer Geophysical Union |
| Additional Information: | Copyright of this article belongs to Amer Geophysical Union. |
| Department/Centre: | Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences |
| Date Deposited: | 10 Nov 2010 05:09 |
| Last Modified: | 10 Nov 2010 05:09 |
| URI: | http://eprints.iisc.ac.in/id/eprint/33711 |
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