Processes influencing the non-linear interaction between inertial oscillations, near inertial internal waves and internal tides

Details Processes influencing the non-linear interaction between inertial oscillations, near inertial internal waves and internal tides Processes influencing the non-linear interaction between inertial oscillations, near inertial internal waves and internal tides

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29e..11x&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 5, pp. 11-1, CiteID 1067, DOI 10.1029/2001GL014199

Physics

8

Oceanography: General: Continental Shelf Processes, Oceanography: General: Numerical Modeling, Oceanography: Physical: Internal And Inertial Waves

Scientific paper

A numerical model of the Hebrides shelf edge (represented by a cross section) is used to examine the non-linear interactions producing energy at the fM2 frequency. Calculations show that in the near coastal ocean this is primarily due to coupling between wind induced inertial oscillations (although near inertial internal waves are present) and the M2 internal tide. The major non-linear interaction, and hence largest fM2 currents, occurs in the region of the thermocline and is associated with shear in the inertial oscillation and the vertical velocity due to the internal tide. This non-linear process represents an important contribution to the energy cascade from the wind and tide into higher frequency waves and eventually mixing. The fM2 current is shown to be a maximum in the shelf edge region and hence measurements in this area will be particularly valuable in determining the extent to which models can represent non-linear processes.

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