scholarly journals The Asymmetric Continental Shelf Wave in Response to the Synoptic Wind Burst in a Semienclosed Double-Shelf Basin

2018 ◽  
Vol 123 (1) ◽  
pp. 131-148 ◽  
Author(s):  
Lixin Qu ◽  
Xiaopei Lin ◽  
Robert D. Hetland ◽  
Jingsong Guo
Keyword(s):  
Continental Shelf ◽  
Synoptic Wind ◽  
Shelf Wave

scholarly journals Observation of a Fast Continental Shelf Wave Generated by a Storm Impacting Newfoundland Using Wavelet and Cross-Wavelet Analyses

2010 ◽  
Vol 40 (2) ◽  
pp. 417-428 ◽  
Author(s):  
Severin Thiebaut ◽  
Ross Vennell
Keyword(s):  
Continental Shelf ◽  
Sea Level ◽  
Atlantic Coast ◽  
Power Spectra ◽  
Phase Speed ◽  
High Amplitude ◽  
Passage Time ◽  
Period Range ◽  
Shelf Wave ◽  
Cross Wavelet

Abstract Wavelet and cross-wavelet power spectra of sea level records from tide gauges along the Atlantic coast of Canada showed a low-frequency barotropic response after Hurricane Florence crossed the Newfoundland shelf in September 2006. In comparison with two other storms, the results showed that Florence was the only one that excited a propagating sea level disturbance with a period range similar to the passage time of the storm over the shelf (26–30 h) and phase shifts consistent with a barotropic continental shelf wave (CSW). The high amplitude of the oscillations generated by Florence along the shore diminished from approximately 45 to 12 cm as the CSW propagated from the south coast of Newfoundland to the southern Nova Scotia seaboard. This paper presents the first direct measurement of a remarkably high alongshore group speed (11.4 ± 5.9 m s−1), in the manner of free-barotropic CSW, by examination of sea level wavelet power spectra at different locations. Furthermore, using cross-wavelet analysis of pairs of stations, an exceptional phase speed of 16.0 ± 5.1 m s−1 has been found, greater than had been previously observed for a free CSW. The results were consistent with dispersion curves for the first-mode barotropic CSW.

An overview of the Brazilian continental shelf wave energy potential

2017 ◽  
Author(s):  
Ricardo Cardoso Guimarães ◽  
Phelype Haron Oleinik ◽  
Eduardo De Paula Kirinus ◽  
Wiliam Correa Marques ◽  
Bruno Vasconcellos Lopes
Keyword(s):  
Continental Shelf ◽  
Wave Energy ◽  
Energy Potential ◽  
Shelf Wave

An overview of the Brazilian continental shelf wave energy potential

2019 ◽  
Vol 25 ◽  
pp. 100446 ◽  
Author(s):  
Ricardo Cardoso Guimarães ◽  
Phelype Haron Oleinik ◽  
Eduardo de Paula Kirinus ◽  
Bruno Vasconcellos Lopes ◽  
Thaísa Beloti Trombetta ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Wave Energy ◽  
Energy Potential ◽  
Shelf Wave

scholarly journals The stability of continental shelf waves I. Side band instability and long wave resonance

1977 ◽  
Vol 20 (1) ◽  
pp. 13-30 ◽  
Author(s):  
R. Grimshaw
Keyword(s):  
Continental Shelf ◽  
Stability Criterion ◽  
Wave Speed ◽  
Side Band ◽  
Long Wave ◽  
Wave Resonance ◽  
Shelf Wave ◽  
Shelf Waves ◽  
The Stability ◽  
Continental Shelf Waves

AbstractContinental shelf waves are examined for side band instability. It is shown that a modulated shelf wave is described by a nonlinear Schrödinger equation, from which the stability criterion is derived. Long shelf waves are stable to side band modulations, but as the wavenumber is increased there are regions of instability (in wavenumber space). A change of stability occurs at each long wave resonance, defined by the condition that the group velocity of the shelf wave equals a long wave speed. Equations describing the long wave resonance are derived.

scholarly journals Continental Shelf Wave Propagation in the Mid-Atlantic Bight: A General Dispersion Relation

2012 ◽  
Vol 42 (4) ◽  
pp. 558-568 ◽  
Author(s):  
William J. Schulz ◽  
Richard P. Mied ◽  
Charlotte M. Snow
Keyword(s):  
Continental Shelf ◽  
Sea Surface ◽  
Long Wave ◽  
Mode Dispersion ◽  
Shelf Wave ◽  
General Dispersion ◽  
Shelf Waves ◽  
Long Wave Approximation ◽  
Continental Shelf Waves ◽  
Good Agreement

Abstract The authors address the propagation of continental shelf waves in the Mid-Atlantic Bight. An analytical model of the bathymetry in the region is constructed by representing the continental shelf as a gently sloping bottom, which deepens linearly with offshore distance to the place where it meets the continental slope. Seaward of that point, the bathymetry is modeled with an exponentially decaying function of distance. The linearized, barotropic equations of hydrostatic motion, subject to the long-wave approximation, yield separate shelf and slope solutions, which are matched at the shelf break to specify the eigenfunctions. The associated eigenvalues define the dispersion relations for each of the modes. Wavenumber–frequency pairs derived from NOAA sea surface height stations along the coast are plotted on the first-mode dispersion curve, and the agreement is good. The theory also shows good agreement with the wave data of D. P. Wang.

scholarly journals Stokes Drift in Topographic Waves over an Enclosed Basin Shelf

2020 ◽  
Vol 50 (5) ◽  
pp. 1197-1211
Author(s):  
Peygham Ghaffari ◽  
Jan Erik H. Weber ◽  
Ole Anders Nøst ◽  
Magnus Drivdal
Keyword(s):  
Continental Shelf ◽  
Time Scales ◽  
Stokes Drift ◽  
The Caspian Sea ◽  
Shelf Slope ◽  
Shelf Wave ◽  
Shelf Waves ◽  
Wind Events ◽  
Mean Current ◽  
Continental Shelf Waves

AbstractThe effect of the continental shelf wave on the flow field over the southern shelf of the Caspian Sea (CS) as the largest enclosed basin of the world, is investigated. Considerable currents with subinertial time scales are observed over the continental shelf in the southern CS. For variations in the surface layer with typical periods of 1 day, local episodic wind events appear to be the driving force. For longer time scales, it is suggested that the observed currents are due to passing continental shelf waves. Measurements over the continental shelf and shelf slope, showing periods of 2–6 days, indicate the presence of such waves. Combined with theory and numerical modeling, the amplitude of the continental shelf wave modes at the coast is assessed from current meter observations. It is demonstrated that the mean drift velocity (the Stokes drift) for long continental shelf waves is determined entirely by the shelf geometry. For the actual shelf mode, it is shown that the associated Stokes drift constitute a nonnegligible mean current along the shelf. This current should be taken into account when assessing the transport of biological material and neutral tracers along the southern coast of the CS.

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