A Limited-Area Model of the Gulf Stream: Design, Initial Experiments, and Model-Data Intercomparison

Abstract

NORDA, Code 323, NSTL Stn., MS 39529-5004, USA J (Journal-Article) M (Marine) A primitive-equation, n-layer, eddy-resolving circulation model has been applied to the Gulf Stream System from Cape Hatteras to east of the Grand Banks (78 degree -45 degree W, 30 degree -48 degree N). Within the limitations of the model, realistic coastlines, bottom topography, and forcing functions have been used. Results from the sequence of experiments suggest an important role for the Deep Western Boundary Current in determining the mean path of the Gulf Stream and consequently the distribution of eddy kinetic energy, and the character of the deep mean flow. The most realistic experiment compares to within a factor of two or better with observations of the amplitude of eddy kinetic energy and rms fluctuations of the thermocline and sea surface height. The mean flow is characterized by recirculations to the north and south of the Gulf Stream and a deep...