South Equatorial Current of the Indian Ocean: a fifty-day oscillation

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Observations of a fifty-day oscillation in the meridional component of the South Equatorial Current in the Western Indian Ocean are presented. Currents measured in 4000 m of water close to the atoll of Aldabra (46°E, 9°S) reveal the oscillation throughout the water column to a depth of 3000 m. Further evidence of the oscillation is presented in shipboard Acoustic Doppler Current Profiler (ADCP) sections and in Coastal Zone Color Scanner (CZCS) imagery. The oscillations are consistent with a zonally propagating Rossby wave caused by shear instability in the zonal flow of the South Equatorial Current. -Authors

Original languageEnglish
Pages (from-to)255-261
Number of pages7
JournalOceanologica Acta
Issue number3
Publication statusPublished - 1 Jan 1994

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