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The capacity of the Landsat 7 Enhanced Thematic Mapper Plus sensor to classify the shallow benthic ecosytems of New Caledonia (South Pacific) is tested using a novel unsupervised classification method. The classes are defined by using a set of multiple spectral decision rules based on the image spectral bands. A general model is applied to the entire Southwest lagoon (5500 km 2 ) and tested...
Moored current measurements, numerical model calculations, and satellite images from the straits of Gibraltar and Kara Gates are compared. The vertical internal displacements (double amplitudes) with a semidiurnal frequency are extremely large in both straits. The displacements are related to internal tidal waves over the sills. The energy of the internal tides is transferred to an internal bore and...
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