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Interannual variability in the tropical Pacific as simulated in coupled ocean-atmosphere models
In: Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam. ISSN 0924-7963; e-ISSN 1879-1573
Ook verschenen 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., meer
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| Abstract |
The space-time structure of interannual sea level variability simulated with two simplified coupled ocean-atmosphere models is investigated by means of Principal Oscillation Pattern (POP) analysis. Both coupled models consists of an Oceanic General Circulation Model (OGCM) of the tropical Pacific and linear atmospheric feedback. The first coupled model uses an empirical atmospheric feedback derived from data. It simulates low frequency oscillations with periods comparable to the ENSO period of a few years when driven with white noise. In the second coupled model we use a linear steady state atmosphere model. This coupled model shows quasiperodic oscillations with periods of about 16 months within a certain parameter range. It is shown that the coupling of ocean and atmosphere is an important contribution for the generation of interannual variability. |
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