TITLE

Three-Dimensional Tidal Flow in an Elongated, Rotating Basin

AUTHOR(S)
Winant, Clinton D.
PUB. DATE
September 2007
SOURCE
Journal of Physical Oceanography;Sept2007, Vol. 37 Issue 9, p2345
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The three-dimensional tidal circulation in an elongated basin of arbitrary depth is described with a linear, constant-density model on the f plane. Rotation fundamentally alters the lateral flow, introducing a lateral recirculation comparable in magnitude to the axial flow, as long as friction is not too large. This circulation is due to the imbalance between the cross-channel sea level gradient, which is in near-geostrophic balance with the Coriolis acceleration associated with the vertically averaged axial flow, and the Coriolis acceleration associated with the vertically sheared axial flow. During flood condition, for example, the lateral Coriolis acceleration near the surface exceeds the pressure gradient, tending to accelerate the lateral flow, while the converse is true near the bottom. As a result, with rotation, fluid parcels tend to corkscrew into and out of the basin in a tidal period. The axial flow is only weakly modified by rotation. When friction is small, the axial velocity is uniform in each section, except in a narrow bottom boundary layer where it decreases to zero. The boundary layer thickness increases with friction, so that with moderate or large friction, axial velocities are sheared from bottom to surface. When friction is large, the local and Coriolis accelerations are both small and the dynamics are governed by a balance between friction and the pressure gradient.
ACCESSION #
26756545

 

Related Articles

  • Complex EOF Analysis as a Method to Separate Barotropic and Baroclinic Velocity Structure in Shallow Water. Edwards, Catherine R.; Seim, Harvey E. // Journal of Atmospheric & Oceanic Technology;May2008, Vol. 25 Issue 5, p808 

    Defining the vertical depth average of measured currents to be barotropic is a widely used method of separating barotropic and baroclinic tidal currents in the ocean. Away from the surface and bottom boundary layers, depth-averaging measured velocity is an excellent estimate of barotropic tidal...

  • The Shallow and Deep Western Boundary Circulation of the South Atlantic at 5°—11°S. Schott, Friedrich A.; Dengler, Marcus; Zantopp, Rainer; Stramma, Lothar; Fischer, Jürgen; Brandt, Peter // Journal of Physical Oceanography;Nov2005, Vol. 35 Issue 11, p2031 

    Repeated shipboard observation sections across the boundary flow off northeastern Brazil as well as acoustic Doppler current profiler (ADCP) and current-meter records from a moored boundary array deployed during 2000–04 near 11°S are analyzed here for both the northward warm water flow...

  • Estimating the Sea Ice Compressive Strength from Satellite-Derived Sea Ice Drift and NCEP Reanalysis Data. Tremblay, L.-B.; Hakakian, M. // Journal of Physical Oceanography;Nov2006, Vol. 36 Issue 11, p2165 

    Satellite-derived sea ice drift maps and sea level pressure from reanalysis data are used to infer upper and lower bounds on the large-scale compressive strength of Arctic sea ice. To this end, the two datasets are searched for special situations in which the wind forcing and its orientation...

  • Experiments and Simulations on Coastal Flows in the Presence of a Topographic Slope. Sansón, L. Zavala; Serravall, R.; Carnevale, G. F.; van Heijst, G. J. F. // Journal of Physical Oceanography;Nov2005, Vol. 35 Issue 11, p2204 

    The evolution of a barotropic coastal current in the presence of a bottom ramp-shaped topography is studied by means of laboratory experiments and numerical simulations. The experiments are performed in a rectangular rotating tank filled with freshwater. The fluid depth is shallow at one side of...

  • Potential Effect of Sea Level Rise on Rambai River, Malaysia. Sathiamurthy, Edlic // World Applied Sciences Journal;2013, Vol. 22 Issue 3, p359 

    Sea level rise could alter the boundary conditions of tidal rivers. This in turn would modify the hydrodynamic behaviour of coastal rivers and consequently their backwater rise. This paper presents the effect of modified boundary conditions on river peak stage and flow resulting from probable...

  • A Nonlinear Model of Level Variations in the Caspian Sea. Naidenov, V. I.; Shveikina, V. I. // Water Resources;Mar2002, Vol. 29 Issue 2, p160 

    A new thermophysical mechanism of the Caspian Sea level variations is proposed. The mechanism incorporates the effect exerted on the dynamics of the water budget of the Caspian Sea by the nonlinear dependence of the evaporation rate on the moistening of the basin.

  • Numerical studies of dispersion due to tidal flow through Moskstraumen, northern Norway. Lynge, Birgit Kjoss; Berntsen, Jarle; Gjevik, Bj�rn // Ocean Dynamics;Aug2010, Vol. 60 Issue 4, p907 

    The effect of horizontal grid resolution on the horizontal relative dispersion of particle pairs has been investigated on a short time scale, i.e. one tidal M2 cycle. Of particular interest is the tidal effect on dispersion and transports in coastal waters where small-scale flow features are...

  • Dynamic sea level changes following changes in the thermohaline circulation. Levermann, Anders; Griesel, Alexa; Hofmann, Matthias; Montoya, Marisa; Rahmstorf, Stefan // Climate Dynamics;Apr2005, Vol. 24 Issue 4, p347 

    Using the coupled climate model CLIMBER-3a, we investigate changes in sea surface elevation due to a weakening of the thermohaline circulation (THC). In addition to a global sea level rise due to a warming of the deep sea, this leads to a regional dynamic sea level change which follows...

  • Pacific Decadal Oscillation and Sea Level Variability in the Bohai, Yellow, and East China Seas. Guoqi Han; Weigen Huang // Journal of Physical Oceanography;Dec2008, Vol. 38 Issue 12, p2772 

    Sea level variability off East China has been investigated based primarily on 10 years of Ocean Topography Experiment (TOPEX)/Poseidon altimetry data. The altimetric annual harmonic has a magnitude of 10 to 30 cm in amplitude and is highest in summer, agreeing well with independent tide-gauge...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics