Abstract
The results of research on internal waves in the northern part of the Laptev Sea are presented. Significant fluctuations of temperature, salinity and currents with periods from 2 to 20 minutes within the seasonal pycnocline. These fluctuations are identified as high-frequency internal gravity waves, the frequency of which is close to the Brunt-Vaisala frequency. Current meter data were used to calculate the linear invariant of the spectral tensor-function of current velocity. Significant spectral density peaks for cycles of 2.0, 2.2, 3.3, 3.6 and 14.8 min were established. It is suggested that the high-frequency internal gravity waves are generated by destruction of an internal tidal wave in the region of the continental slope. This supposition is confirmed by temporal variability of the linear invariant of the variance tensor of current velocity at 10 m depth. It is suggested that the internal waves play an important role in mixing processes and the formation of mesoscale (tidal) frontal zones close to the continental slope.
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