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Indian Ocean Rossby waves observed in TOPEX/POSEIDON altimeter data and in model simulations

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Analysis of 3 years of TOPEX/POSEIDON (T/P) altimeter data in the Indian Ocean revealed discrepancies between observed and theoretical Rossby wave phase speeds. Rossby waves were observed at all latitudes using Hovmoller diagrams or longitude/time plots; their phase speeds were computed using twodimensional Fast Fourier Transforms (FFTs). Complex Principal Component Analysis (CPCA) was applied to detect travelling waves. A simple wind-driven layer model was implemented for this region and forced with the ERS-1 scatterometer winds, sampled over the same period as the T/P data, to demonstrate that these winds account for much of the observed Rossby wave activity.
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Document Type: Research Article

Affiliations: 1: School of Ocean and Earth Science 2: James Rennell Division for Ocean Circulation & Climate, Southampton Oceanography Centre, European Way, Southampton, SO14 3ZH, England, UK

Publication date: 2001-01-10

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