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Using a linear array to estimate the velocity of underwater moving targets
underwater velocity measurement linear array direction of arrival (DOA) deterministic maximum likelihood signal phase matching
2011/9/13
A new method uses a linear array that takes advantage of underwater physical sound fields to estimate the velocity of an underwater moving target. The mathematical model was established by considering...
Non-linear complex principal component analysis of nearshore bathymetry
Non-linear complex principal component analysis nearshore bathymetry
2009/11/11
Complex principal component analysis (CPCA) is a useful linear method for dimensionality reduction of data sets characterized by propagating patterns, where the CPCA modes are linear functions of the ...
Baroclinic Instability over a Slope. Part I：Linear Theory
Baroclinic Instability Slope Linear Theory
2009/3/24
We consider the instability properties of a circular current in the upper layer of a two-layer quasi-geostrophic ocean over a unidirectional slope. This particular flow-topography geometry is intended...
A Quasi-Linear Model of the Combined Wind-Driven and Thermohaline Circulations in a Rectangular β-Plane Ocean
Quasi-Linear Model Thermohaline Circulations Combined Wind-Driven Rectangular β-Plane Ocean
2009/3/24
Three-dimensional temperature and velocity fields are calculated analytically for a rectangular β-plane ocean model, forced by a prescribed wind stress and surface heat flux. A basic thermal state inv...
The spindown of an ocean is investigated, using a two-layer numerical model. At the initial instant, a pool of warm water the size of the Coral Sea occupies the subtropical portion of the top layer; t...
The Application of Linear Quasigeostrophic Dynamics to Gulf Stream Rings
Linear Quasigeostrophic Dynamics Gulf Stream Rings
2009/3/7
We have used linear quasigeostrophic dynamics to calculate the motion, decay and dispersion rates of radially symmetric initial disturbances with scales appropriate to Gulf Stream Rings. Baroclinic ri...
The Seasonal Variation of the Surface Mixed-Layer Response to the Vertical Motions of Linear Rossby Waves
sea surface temperature Seasonal Variation Surface Mixed-Layer Linear Rossby Waves
2009/2/5
A Kraus-Turner (1967) seasonal mixed-layer model with constant background dissipation is used to study the mixed-layer response to the vertical motions of linear Rossby waves that are not driven by di...
Linear Instability of a Current Flowing Along a Bottom Slope Using a Three-Layer Model
Linear Instability Current Flowing Bottom Slope Using Three-Layer Model
2009/1/22
A quasi-geostrophic model of a three-layer fluid on an f-plane is employed to study instability of a current flowing over a uniform bottom slope with isobaths parallel to the current. The model has a ...
The Near Surface Equatorial Indian Ocean in 1979. Part I：Linear Dynamics
Equatorial Indian Ocean Linear Dynamics
2009/1/21
Different wind field analyses are used to force a one layer adiabatic model of the near equatorial surface circulation in the Indian Ocean in 1979. The model simulates the major features of the observ...
Double-Diffusive Interleaving. Part I：Linear Stability Analysis
Double-Diffusive Interleaving Linear Stability Analysis
2009/1/16
Quasi-horizontal interleaving between water masses is frequently observed in the frontal regions between different water masses where there are significant compensating isopycnal gradients of temperat...
The Seasonal Linear Response of the Tropical Atlantic Ocean
Seasonal Linear Tropical Atlantic Ocean
2009/1/15
The linear response of the tropical Atlantic ocean to climatological winds is calculated in a continuously stratified model and compared with observations. All the characteristic features of the dynam...
Vertical Reynolds Stress Divergence in the Upper Ocean Associated with Linear Wind-Driven, Near-Inertial Waves of Finite Wavelength
Vertical Reynolds Stress Divergence Upper Ocean Linear Wind-Driven Near-Inertial Waves Finite Wavelength
2009/1/12
Study of a schematic linear, wind-driven, inertio–gravity wave model in the upper ocean finds resonant, near-inertial waves of finite horizontal wavelength to have both horizontal and vertical motions...
Linear Stability of Large, Elliptical Warm-Core Rings
Linear Stability Elliptical Warm-Core Rings
2009/1/12
An analytical solution for a confined, elliptical lens of light water is perturbed to test the linear stability of elongated warm-core rings. The asymptotic expression of the solution when the eddy's ...
Numerical Simulation of Transient Boundary-Forced Radiation. Part I：The Linear Regime
Numerical Simulation Linear Regime Transient Boundary-Forced Radiation
2009/1/8
Increasing evidence suggests that the Gulf Stream system is the origin for much of the eddy variability observed in the northwestern Atlantic Ocean. However, the dynamical mechanisms by which eddy ene...
The potential and kinetic energy spectra following geostrophic adjustment of a barotropic fluid are determined as functions of the spectrum of arbitrary initial sea level or velocity. Remarkably, the ...