Global observations of large oceanic eddies

Details Global observations of large oceanic eddies Global observations of large oceanic eddies

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3415606c&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 15, CiteID L15606

Physics

93

Oceanography: General: Remote Sensing And Electromagnetic Processes (0689, 2487, 3285, 4455, 6934), Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Sea Level: Variations And Mean (1222, 1225, 1641)

Scientific paper

Ten years of sea-surface height (SSH) fields constructed from the merged TOPEX/Poseidon (T/P) and ERS-1/2 altimeter datasets are analyzed to investigate mesoscale variability in the global ocean. The higher resolution of the merged dataset reveals that more than 50% of the variability over much of the World Ocean is accounted for by eddies with amplitudes of 5-25 cm and diameters of 100-200 km. These eddies propagate nearly due west at approximately the phase speed of nondispersive baroclinic Rossby waves with preferences for slight poleward and equatorward deflection of cyclonic and anticyclonic eddies, respectively. The vast majority of the eddies are found to be nonlinear.

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