A THREE DIMENSIONAL MODEL OF THE GULF OF ALASKA

This paper presents the development of a three dimensional model of the Gulf of Alaska. The model extends between the Vancouver Island and the Aleutian Islands covering approximatedly 1.5 million square kilometers over the northern Pacific Ocean. Formulated on an ellipsoidal horizontal grid and variable vertical grid, the model is schematized over a 81 x 53 x 10 grid structure. The solution scheme is implicit over the vertical and is programmed using one-dimensional dynamic array for the efficient use of machine storage. The turbulence closure scheme for the non-homogeneous vertical shear is formulated so that the potential and kinetic energetics are monitored and transferred in a closed form. The hydrodynamic model is coupled to a two-dimensional stochastic weather model and an oil-spill trajectory/weathering model. The former also simulates stochastically the cyclogenetic/cyclolytic processes within the modeled area. The paper also compares the computed results with the available field data. Good agreements are found in tidal amplitude and phases as well as currents.

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A Three Dimensional Model of the Gulf of Alaska

Coastal Engineering 1986 ◽

10.1061/9780872626003.193 ◽

1987 ◽

Author(s):

Shiao-Kung Liu ◽

Jan J. Leendertse

Keyword(s):

Three Dimensional ◽

Gulf Of Alaska ◽

Dimensional Model ◽

Three Dimensional Model

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Numerical simulation of circulation in Gulf St Vincent due to an idealized storm.

Marine and Freshwater Research ◽

10.1071/mf9770775 ◽

1977 ◽

Vol 28 (6) ◽

pp. 775 ◽

Cited By ~ 1

Author(s):

AH Sharobeam ◽

TG Sag

Keyword(s):

Numerical Simulation ◽

Three Dimensional ◽

Equation Of Motion ◽

Vertical Surface ◽

Dimensional Model ◽

Three Dimensional Model ◽

Primitive Equation ◽

Surface Displacements ◽

Complete Reversal ◽

Vertical Grid

A three-dimensional model was developed using the primitive equation of motion and continuity equation and allowing for vertical surface displacements to occur. Actual depths were used and observed values for the temperature and salinity were used to calculate the density. Four vertical grid layers were used in the numerical simulation of the circulation. The wind speed and directions were based on a theoretical form for the wind stream function. This form was similar to that for observed storm patterns in the gulf area. The simulation was carried out over a period of about 60 h and displays of mass transports, horizontal velocities at each layer and surface elevations were produced at regular intervals throughout the simulation. In the wake of the storm there was a complete reversal of the directions of the flow after the first 6 h followed by a return to the original directions after the next 6 h and then a return to the initial steady state during the next 12 h. The elevations were found to increase rapidly with the increase in the wind velocity in the shallow parts of the gulf and the lines of constant elevations settled to a direction perpendicular to the wind direction.

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A THREE-DIMENSIONAL MODEL OF BERING AND CHUKCHI SEA

Coastal Engineering Proceedings ◽

10.9753/icce.v18.39 ◽

1982 ◽

Vol 1 (18) ◽

pp. 39 ◽

Cited By ~ 2

Author(s):

Shiao-Kung Liu ◽

Jan J. Leendertse

Keyword(s):

Chukchi Sea ◽

Three Dimensional ◽

Storm Track ◽

Shelf Area ◽

Dimensional Model ◽

Three Dimensional Model ◽

Offshore Area ◽

Tidal Propagation ◽

Weather Model ◽

Moving Storm

A part of the continental shelf area of the Bering and Chukchi Sea are now being opened up for oil exploration. For engineering and ecological risk analyses, extensive field data collection efforts are being carried out by various United States agencies and petroleum corporations to understand the hydrodynamic behavior of this vast offshore area. In addition, modeling studies are being made for which a three-dimensional model of the area, outlined in Fig. 1, has been developed. This model is dynamically coupled to a two-dimensional stochastic weather model. This weather model contains a Markov synoptic component and a storm track component. The parameters of this model are derived from a 20-year data base. This paper presents a description of the three-dimensional model and the results of a series of simulations using the model to compute tidal propagation and circulations induced by tides and wind. The results of a simulation of a moving storm through the eastern Bering Sea are also presented.

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