Articles | Volume 19, issue 4
https://doi.org/10.5194/os-19-1067-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-19-1067-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Mode-1 N2 internal tides observed by satellite altimetry
Applied Physics Laboratory, University of Washington, Seattle, Washington, USA
School of Oceanography, University of Washington, Seattle, Washington, USA
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This study examines the seasonal variability in internal tide sea surface height in a global model simulation. We also compare this with altimetry and the seasonal variability in the internal tide energy terms. Georges Bank and the Arabian Sea show the strongest seasonal variability. This study also reveals that sea surface height may not be the most accurate indicator of the true seasonal variability in the internal tides because it is modulated by the seasonal variability in stratification.
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When the internal solitary wave propagates to the continental shelf and slope, the polarity reverses due to the shallower water depth. In this process, the internal solitary wave dissipates energy and enhances diapycnal mixing, thus affecting the local oceanic environment. In this study, we used reflection seismic data to evaluate the spatial distribution of the diapycnal mixing around the polarity-reversing internal solitary waves.
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Short summary
Satellite altimetry provides a unique technique for observing the sea surface height (SSH) signature of internal tides from space. The advances in mapping technique, combined with the accumulation of satellite altimetry data, make it possible to construct empirical models for minor internal tide constituents. This paper demonstrates that N2 internal tides, the fifth largest tidal constituent, are observed using 100 satellite years of SSH data from 1993 to 2019 by a new mapping procedure.
Satellite altimetry provides a unique technique for observing the sea surface height (SSH)...