Resonant diurnal internal tides in the North Atlantic

Details Resonant diurnal internal tides in the North Atlantic Resonant diurnal internal tides in the North Atlantic

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.2189d&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 12, p. 2189-2192

Physics

6

Oceanography: Physical: Internal And Inertial Waves, Oceanography: Physical: Surface Waves And Tides, Oceanography: General: Ocean Acoustics, Oceanography: General: Diurnal, Seasonal, And Annual Cycles

Scientific paper

Using a large acoustical array located midway between Puerto Rico and Bermuda, we have observed enhanced diurnal tidal signals associated with the lowest internal-wave mode. These signals result from a diurnal internal wave resonantly trapped between the shelf just north of Puerto Rico and the turning latitude, a distance of about 1100 km. The data obtained using the large acoustical array are consistent with the predicted Airy-function variation with latitude of diurnal internal waves near the turning latitude. The existence of this wave is a striking demonstration of the long spatial and temporal coherence of oceanic internal tides. In general, the energy radiated by such waves is a loss of energy from the earth-moon system and a source of energy for mixing in the deep ocean.

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