Physics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h..91d&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 8, pp. 91-1, CiteID 1250, DOI 10.1029/2001GL013944
Physics
9
Oceanography: Physical: Surface Waves And Tides (1255), Oceanography: Physical: Internal And Inertial Waves, Oceanography: General: Remote Sensing And Electromagnetic Processes (0689), Oceanography: General: Instruments And Techniques
Scientific paper
Objective maps of M2 internal-tide variability are derived from TOPEX/POSEIDON altimeter data obtained near the Hawaiian Ridge. An estimate of the wavenumber spectrum shows that the radiation is dominated by a few spectral peaks at wavenumbers consistent with the theoretically expected value for mode-1 internal tides. The data are not always consistent with the traveling wave model. Because the spacing of the altimeter tracks is larger than the internal-tide wavelength, the objective map underestimates the energy between the altimeter tracks. With this caveat, the maps are used to determine that 2.6 GW of power is radiated from a 1700 km section of the Hawaiian Ridge. Time series of hydrographic data obtained at the HOT site north of Oahu, Hawaii show that changes in mode-1 phase speed, caused by variations in stratification, have only a small effect on the propagation of the mode-1 internal tides.
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