scholarly journals Tomographic mapping of a coastal upwelling and the associated diurnal internal tides in Hiroshima Bay, Japan

2015 ◽  
Vol 120 (6) ◽  
pp. 4288-4305 ◽  
Author(s):  
Chuanzheng Zhang ◽  
Arata Kaneko ◽  
Xiao‐Hua Zhu ◽  
Noriaki Gohda
Keyword(s):  
Coastal Upwelling ◽  
Internal Tides ◽  
Tomographic Mapping

Coastally trapped waves, baroclinic eddies, internal tides and oceanic fronts at the shelf break: their implications for exchanges between shelf and oceanic waters

1981 ◽  
Vol 302 (1472) ◽  
pp. 661-661 ◽  
Keyword(s):  
Coastal Waters ◽  
Coastal Upwelling ◽  
Shelf Break ◽  
Internal Tides ◽  
Oceanic Fronts ◽  
Run Off ◽  
Break Surface ◽  
Seaward Edge ◽  
Coastally Trapped Waves ◽  
Topographic Rossby Waves

The seaward edge of the continental shelf, or shelf break, is the locus of strong physical variability in the overlying waters. Near the shelf-break, surface tides scatter energy into internal modes that propagate both onshore and offshore and produce strong vertical shears. Atmospheric forcing generates subinertial-frequency topographic Rossby waves, which propagate parallel to the coastline and are strongly trapped near the shelf break. Relative to the sloping topography, wind-driven coastal upwelling generates prograde fronts, and river run-off generates retrograde fronts. Located near the shelf break, these fronts are boundaries between oceanic and coastal waters. Oceanic eddies impinge on, and move along, the shelf-break entraining coastal waters. Eddies may also be shed by shelf-break fronts. Submarine capes and canyons contort the shelf break and significantly modify the enumerated processes. Based on observational evidence from a few coastal regimes, the shelf break is a zone where several mesoscale and synoptic-scale processes operate and probably produce significant turbulent transfers.

scholarly journals On the Dynamics of the Southern Senegal Upwelling Center: Observed Variability from Synoptic to Superinertial Scales

2017 ◽  
Vol 47 (1) ◽  
pp. 155-180 ◽  
Author(s):  
Xavier Capet ◽  
Philippe Estrade ◽  
Eric Machu ◽  
Siny Ndoye ◽  
Jacques Grelet ◽  
...  
Keyword(s):  
System Dynamics ◽  
Solitary Waves ◽  
Large Amplitude ◽  
Coastal Upwelling ◽  
Shelf Break ◽  
Internal Tides ◽  
Large Area ◽  
Thermohaline Structure ◽  
Field Campaign ◽  
It Impacts

AbstractUpwelling off southern Senegal and Gambia takes place over a wide shelf with a large area where depths are shallower than 20 m. This results in typical upwelling patterns that are distinct (e.g., more persistent in time and aligned alongshore) from those of other better known systems, including Oregon and Peru where inner shelves are comparatively narrow. Synoptic to superinertial variability of this upwelling center is captured through a 4-week intensive field campaign, representing the most comprehensive measurements of this region to date. The influence of mesoscale activity extends across the shelf break and far over the shelf where it impacts the midshelf upwelling (e.g., strength of the upwelling front and circulation), possibly in concert with wind fluctuations. Internal tides and solitary waves of large amplitude are ubiquitous over the shelf. The observations suggest that these and possibly other sources of mixing play a major role in the overall system dynamics through their impact upon the general shelf thermohaline structure, in particular in the vicinity of the upwelling zone. Systematic alongshore variability in thermohaline properties highlights important limitations of the 2D idealization framework that is frequently used in coastal upwelling studies.

scholarly journals On the characteristics of internal tides and coastal upwelling behaviour in Marguerite Bay, west Antarctic Peninsula

2008 ◽  
Vol 55 (18-19) ◽  
pp. 2023-2040 ◽  
Author(s):  
Margaret I. Wallace ◽  
Michael P. Meredith ◽  
Mark A. Brandon ◽  
Toby J. Sherwin ◽  
Andrew Dale ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Coastal Upwelling ◽  
Internal Tides ◽  
West Antarctic ◽  
Marguerite Bay ◽  
West Antarctic Peninsula

Modeling the Central California Coastal Upwelling System: Physics, Ecosystems and Resource Management

2002 ◽  
Author(s):  
Francisco P. Chavez ◽  
Richard T. Barber ◽  
Fei Chai ◽  
Yi Chao ◽  
Andrew P. De Vogelaere ◽  
...  
Keyword(s):  
Resource Management ◽  
Coastal Upwelling ◽  
Central California ◽  
Upwelling System

Coastal upwelling observed by multi-satellite sensors

2009 ◽  
Vol 52 (7) ◽  
pp. 1030-1038 ◽  
Author(s):  
XiaoMing Li ◽  
XiaoFeng Li ◽  
MingXia He
Keyword(s):  
Coastal Upwelling ◽  
Satellite Sensors

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.

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