EXPERIMENTAL EVIDENCES OF RAY-PROPAGATION OF INTERNAL TIDES NEAR MASCAREN RIDGE

The fortnight measurements of temperature and current fluctuations on six moored buoys in Mascaren ridge region are analysed. Amplitudes of semidiurnal temperature and current fluctiations and its vertical profiles are not consisting with the modal structure of internal waves. Vertical wave-number spectra of semidiurnal fluctuations are sharply asymmetrical ones. It indicates on the ray-like propagation of waves and on reflection these rays on sloping bottom and relation between lengths of up and down going waves corresponds to reflection on the sloping bottom. The scope of experimental data shows the localization of the source of internal tides on the ridge and certain features of its ray propagation in the vicinity of the ridge.