Intermediate models of intraseasonal and interannual waves in the tropics
In: Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam. ISSN 0924-7963; e-ISSN 1879-1573, more
Also appears in:Nihoul, J.C.J. (Ed.) (1990). Coupled ocean-atmosphere modeling: proceedings of the 21th International Liège Colloquium on Ocean Hydrodynamics, Liège, May 8-12, 1989. Journal of Marine Systems, 1(1-3). Elsevier Scientific: Amsterdam. 313 pp., more
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| Abstract |
The main interannual signal in the tropics is the El Nino Southern Oscillation (ENSO) phenomenon, which is essentially driven by ocean-atmosphere interaction in the Pacific (and probably Indian Ocean) regions. This paper describes a coupled ocean-atmosphere-land model of intermediate complexity, with realistic tropical geometry. Land conditions control whether or not the model produces interannual variability in the Pacific; a result which emphasises the importance of the "maritime continent" region in affecting tropical variability. Active interannual variability is confined to the Pacific region, with eastward propagation of coupled modes that are regenerated in the western Pacific at regular intervals. Additional atmospheric "noise" in the 9 to 180 day range, and an annual cycle in land heating, did not disturb this regular behaviour. |
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