Island Wakes

2001 ◽  
pp. 1397-1403 ◽  
Author(s):  
E.D. Barton
Keyword(s):  
Island Wakes

Shallow-water Frictional Effects in Island Wakes

1998 ◽  
Vol 46 (4) ◽  
pp. 599-607 ◽  
Author(s):  
K. Furukawa ◽  
E. Wolanski
Keyword(s):  
Shallow Water ◽  
Island Wakes ◽  
Frictional Effects

Detecting Tropical River Plumes and Island Wakes with RADARSAT

2000 ◽  
Vol 26 (4) ◽  
pp. 267-272 ◽  
Author(s):  
G.R. Cresswell ◽  
P.C. Tildesley
Keyword(s):  
Tropical River ◽  
River Plumes ◽  
Island Wakes

Island Wakes

2019 ◽  
pp. 83-91
Author(s):  
R.M.A. Caldeira
Keyword(s):  
Island Wakes

scholarly journals Cylinder wakes in shallow oscillatory flow: the coastal island wake problem

2019 ◽  
Vol 874 ◽  
pp. 158-184 ◽  
Author(s):  
Paul M. Branson ◽  
Marco Ghisalberti ◽  
Gregory N. Ivey ◽  
Emil J. Hopfinger
Keyword(s):  
Boundary Layer ◽  
Oscillatory Flow ◽  
Bottom Friction ◽  
Stability Parameter ◽  
Bottom Boundary Layer ◽  
Ekman Pumping ◽  
Bottom Boundary ◽  
Island Wakes ◽  
Island Wake ◽  
The Stability

Topographic complexity on continental shelves is the catalyst that transforms the barotropic tide into the secondary and residual circulations that dominate vertical and cross-shelf mixing processes. Island wakes are one such example that are observed to significantly influence the transport and distribution of biological and physical scalars. Despite the importance of island wakes, to date, no sufficient, mechanistic description of the physical processes governing their development exists for the general case of unsteady tidal forcing. Controlled laboratory experiments are necessary for the understanding of this complex flow phenomenon. Here, three-dimensional velocity field measurements of cylinder wakes in shallow-water oscillatory flow are conducted across a parameter space that is typical of tidal flow around shallow islands. The wake form in steady flows is typically described in terms of the stability parameter $S=c_{f}D/h$ (where $D$ is the island diameter, $h$ is the water depth and $c_{f}$ is the bottom boundary friction coefficient); in tidal flows, there is an additional dependence on the Keulegan–Carpenter number $KC=U_{0}T/D$ (where $U_{0}$ is the tidal velocity amplitude and $T$ is the tidal period). In this study we demonstrate that when the influence of bottom friction is confined to a Stokes boundary layer the stability parameter is given by $S=\unicode[STIX]{x1D6FF}^{+}/KC$ where $\unicode[STIX]{x1D6FF}^{+}$ is the ratio of the wavelength of the Stokes bottom boundary layer to the depth. Three classes of wake form are observed with decreasing wake stability: (i) steady bubble for $S\gtrsim 0.1$; (ii) unsteady bubble for $0.06\lesssim S\lesssim 0.1$; and (iii) vortex shedding for $S\lesssim 0.06$. Transitions in wake form and wake stability are shown to depend on the magnitude and temporal evolution of the wake return flow. Scaling laws are developed to allow upscaling of the laboratory results to island wakes. Vertical and lateral transport depend on three parameters: (i) the flow aspect ratio $h/D$; (ii) the amplitude of tidal motion relative to the island size, given by $KC$; and (iii) the relative influence of bottom friction to the flow depth, given by $\unicode[STIX]{x1D6FF}^{+}$. A model of wake upwelling based on Ekman pumping from the bottom boundary layer demonstrates that upwelling in the near-wake region of an island scales with $U_{0}(h/D)KC^{1/6}$ and is independent of the wake form. Finally, we demonstrate an intrinsic link between the dynamical eddy scales, predicted by the Ekman pumping model, and the island wake form and stability.

Vertical structure and surface patterns of Green Island wakes induced by the Kuroshio

2019 ◽  
Vol 143 ◽  
pp. 1-16 ◽  
Author(s):  
Po-Chun Hsu ◽  
Kai-Ho Cheng ◽  
Sen Jan ◽  
Hung-Jen Lee ◽  
Chung-Ru Ho
Keyword(s):  
Vertical Structure ◽  
Island Wakes ◽  
Surface Patterns ◽  
The Kuroshio ◽  
Green Island

Island wakes in shallow coastal waters

1984 ◽  
Vol 89 (C6) ◽  
pp. 10553 ◽  
Author(s):  
E. Wolanski ◽  
J. Imberger ◽  
M. L. Heron
Keyword(s):  
Coastal Waters ◽  
Island Wakes ◽  
Shallow Coastal Waters

scholarly journals Island Wakes Observed from High-Frequency Current Mapping Radar

Oceanography ◽  
2019 ◽  
Vol 32 (4) ◽  
pp. 92-101 ◽  
Author(s):  
Sophia Merrifield ◽  
◽  
Patrick Colin ◽  
Thomas Cook ◽  
Carlos Garcia-Moreno ◽  
...  
Keyword(s):  
High Frequency ◽  
High Frequency Current ◽  
Island Wakes ◽  
Frequency Current

Tidally generated island wakes and surface water cooling over Izu Ridge

2019 ◽  
Vol 69 (11-12) ◽  
pp. 1373-1385 ◽  
Author(s):  
Tsubasa Kodaira ◽  
Takuji Waseda
Keyword(s):  
Surface Water ◽  
Water Cooling ◽  
Island Wakes ◽  
Izu Ridge

Island Wakes

2001 ◽  
pp. 343-348 ◽  
Author(s):  
E.D. Barton
Keyword(s):  
Island Wakes
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