Propagation of the overtide M4 through the deep Atlantic Ocean

Details Propagation of the overtide M4 through the deep Atlantic Ocean Propagation of the overtide M4 through the deep Atlantic Ocean

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3421602r&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 21, CiteID L21602

Physics

6

Oceanography: Physical: Surface Waves And Tides (1222), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Geodesy And Gravity: Ocean Monitoring With Geodetic Techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)

Scientific paper

The nonlinear overtide M4 is generated in shallow waters and is generally no more than a few mm amplitude in the deep ocean. Such small, periodic waves can now be mapped empirically by analyzing the long (15-year) time series of Topex/Poseidon and Jason-1 satellite altimetry. In a few locations of the deep Atlantic, M4 amplitudes reach nearly 10 mm, confirming recent modeling efforts by Lyard and colleagues. These relatively large amplitudes evidently represent a complex interference pattern of free waves radiating from a few shallow sources, especially the Patagonian Shelf. They form approximately a standing-wave resonance in the Gulf of Guinea.

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