Mode-one internal tides propagating across a geostrophic current

2021 ◽  
Vol 33 (9) ◽  
pp. 096606
Author(s):  
Yangxin He ◽  
Kevin G. Lamb
Keyword(s):  
Internal Tides ◽  
Geostrophic Current

scholarly journals Satellite Investigation of Semidiurnal Internal Tides in the Sulu-Sulawesi Seas

2021 ◽  
Vol 13 (13) ◽  
pp. 2530
Author(s):  
Xiaoyu Zhao ◽  
Zhenhua Xu ◽  
Ming Feng ◽  
Qun Li ◽  
Peiwen Zhang ◽  
...  
Keyword(s):  
Interference Pattern ◽  
Energy Flux ◽  
Internal Tide ◽  
Tidal Energy ◽  
Internal Tides ◽  
Altimeter Data ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Sulu Sea ◽  
Tidal Energy Flux

The mode-1 semidiurnal internal tides that emanate from multiple sources in the Sulu-Sulawesi Seas are investigated using multi-satellite altimeter data from 1993–2020. A practical plane-wave analysis method is used to separately extract multiple coherent internal tides, with the nontidal noise in the internal tide field further removed by a two-dimensional (2-D) spatial band-pass filter. The complex radiation pathways and interference patterns of the internal tides are revealed, showing a spatial contrast between the Sulu Sea and the Sulawesi Sea. The mode-1 semidiurnal internal tides in the Sulawesi Sea are effectively generated from both the Sulu and Sangihe Island chains, forming a spatially inhomogeneous interference pattern in the deep basin. A cylindrical internal tidal wave pattern from the Sibutu passage is confirmed for the first time, which modulates the interference pattern. The interference field can be reproduced by a line source model. A weak reflected internal tidal beam off the Sulawesi slope is revealed. In contrast, the Sulu Island chain is the sole energetic internal tide source in the Sulu Sea, thus featuring a relatively consistent wave and energy flux field in the basin. These energetic semidiurnal internal tidal beams contribute to the frequent occurrence of internal solitary waves (ISWs) in the study area. On the basis of the 28-year consistent satellite measurements, the northward semidiurnal tidal energy flux from the Sulu Island chain is 0.46 GW, about 25% of the southward energy flux. For M2, the altimetric estimated energy fluxes from the Sulu Island chain are about 80% of those from numerical simulations. The total semidiurnal tidal energy flux from the Sulu and Sangihe Island chains into the Sulawesi Sea is about 2.7 GW.

scholarly journals Low-mode internal tides and balanced dynamics disentanglement in altimetric observations: Synergy with surface density observations

2017 ◽  
Vol 122 (3) ◽  
pp. 2143-2155 ◽  
Author(s):  
Aurélien L. Ponte ◽  
Patrice Klein ◽  
Michael Dunphy ◽  
Sylvie Le Gentil
Keyword(s):  
Surface Density ◽  
Internal Tides ◽  
Balanced Dynamics

Three-dimensional numerical simulation of M2 internal tides in the Luzon Strait

2015 ◽  
Vol 34 (11) ◽  
pp. 55-62 ◽  
Author(s):  
Bingtian Li ◽  
Anzhou Cao ◽  
Xianqing Lv
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Luzon Strait ◽  
Internal Tides

The Shaping of Continental Slopes by Internal Tides

Science ◽  
2002 ◽  
Vol 296 (5568) ◽  
pp. 724-727 ◽  
Author(s):  
D. A. Cacchione
Keyword(s):  
Internal Tides ◽  
Continental Slopes
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