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Internal Wave Reflection by a Velocity Shear and Density Anomaly
Internal Wave Velocity Shear Density Anomaly
2009/3/24
Numerical solutions are obtained for the reflection of upward propagating internal waves by simple pycnocline and current shear models. Results for a simple monotonic shear and a velocity jet, with an...
Shear dispersion results from vertical shear of horizontal velocity and vertical mixing, features which cannot be included explicitly in one-layer, vertically integrated models. The parametric descrip...
Residual Flow and Boundary Shear Stress in the Turbulent Bottom Layer Beneath Waves
Residual Flow Turbulent Bottom Layer Beneath Waves
2009/3/7
A model is considered of the turbulent bottom boundary layer beneath waves. Closure is effected at the level of the turbulent energy equation and numerical solutions are obtained by a combination of f...
The Effect of Current Shear on Topographic Rossby Waves
Current Shear Topographic Rossby Waves
2009/2/16
Topographic Rossby waves are long-period waves which occur on continental slopes. In this paper we examine the effect of a mean current on these waves, when the current is directed along the isobaths ...
Equatorial Kelvin and Inertio-Gravity Waves in Zonal Shear Flow
Equatorial Kelvin Inertio-Gravity Waves Zonal Shear Flow
2009/2/13
The interaction of geostrophic zonal mean currents in an equatorial ocean with free, neutrally stable, internal Kelvin and inertio-gravity waves is investigated using a two-layer, reduced-gravity mode...
A Composite Spectrum of Vertical Shear in the Upper Ocean
Composite Spectrum Vertical Shear Upper Ocean
2009/2/10
Results from three separate velocity profilers operated nearly simultaneously in the northwest Atlantic in 1975 are used to form a composite shear spectrum over vertical wavelengths from 100 m down to...
Instability of Baroclinic Flows with Horizontal Shear Along Topography
Topography Baroclinic Flows Horizontal Shear
2009/2/9
The stability of baroclinic flows with horizontal shear over sloping topography is analyzed with special emphasis on the structure and energetics of the unstable perturbatiorts. The study is conducted...
The Effects of Mean Shear Flow on Equatorial Basin Modes
Mean Shear Flow Equatorial Basin Modes
2009/2/8
We test the sensitivity of energy trapping by equatorial basin modes to the presence of mean currents in a series of numerical experiments. At low frequency, trapping persists in the form of modified ...
On Stable and Unstable Rossby Waves in Non-Zonal Oceanic Shear Flow
Rossby Waves Non-Zonal Oceanic Shear Flow
2009/2/7
We derive linear equations for the study of baroclinic instability of a non-zonal oceanic shear flow whose direction is allowed to change with depth. These equations can be used to study unstable dist...
Shear-Flow Dispersion, Internal Waves and Horizontal Mixing in the Ocean
Shear-Flow Dispersion Horizontal Mixing Internal Waves
2009/2/7
wave are discussed. Our goal is to develop intuition about the role of such currents in horizontal ocean mixing through the mechanism of shear dispersion. The analysis suggests simple parameterization...
Determination of the Rate of Dissipation of Turbulent Energy from Simultaneous Temperature and Velocity Shear Microstructure Measurements
Turbulent Energy Simultaneous Temperature Velocity Shear
2009/2/7
Spectra of turbulence have been examined for both temperature gradient and velocity shear. The data for this comparison are 10–15 m segments of vertical microstructure profiles (at depths of 5–100 m) ...
Effects of Velocity Shear in Advective Mixed-Layer Models
Velocity Shear Advective Mixed-Layer Models
2009/2/6
A general multidimensional model of the upper mixed layer of oceans and lakes is presented. The density profile is approximated as uniform over the depth of the layer. Such an assumption is not made f...
A Statistical Model of Vertical Shear from Moored Current Meters
Statistical Model Vertical Shear Moored Current Meters
2009/2/5
We derive a statistical model or shear to predict how measurement of mean-square shear vary with stratification and with vertical separation Δz between moored current meters. Our model is based on a s...
In applying the Wall layer analogy to a wind blown free surface it is necessary to decide in what coordinate system such an anology is realistic. A smoothed sea surface is taken to be that produced by...
A Wavenumber-Frequency Spectrum of Upper Ocean Shear
Wavenumber-Frequency Spectrum Upper Ocean Shear
2009/1/16
In May 1980 an 18-day sequence of oceanic velocity profiles was obtained off the coast of Southern California. The measurements were made using a pair of Doppler sonars mounted on the research platfor...