Low-Frequency Eddy Kinetic Energy Spectrum in the Deep Western North Pacific

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Science  25 Jun 1982:
Vol. 216, Issue 4553, pp. 1407-1408
DOI: 10.1126/science.216.4553.1407


The frequency spectrum for the low-frequency eddy kinetic energy is estimated from a long-term current meter record obtained in a deep layer in the western North Pacific. The eddy field is characterized by three time scales: an "annual scale" with zonal dominance of eddy motions, a "temporal mesoscale" with meridional dominance, and a "monthly scale" with horizontal isotropy. About two-thirds of the eddy kinetic energy is contained in the temporal mesoscale.