A Numerical Study of Loop Current Intrusions and Eddy Shedding

摘要

The dynamics of the eddy shedding by the Loop Current in the Gulf of Mexico have been investigated using three nonlinear numerical models: two-layer, barotropic, and reduced gravity. The barotropic and reduced gravity models demonstrate the individual behavior of the external and internal modes, and provide insight into how they interact in the two-layer model. Because of the economy of the semi-implicit free surface models, it was possible to perform over 100 experiments to investigated the stability properties of the Loop Current. Typically the models were integrated 3 to 5 years to statistical equilibrium on a 1600 x 900 km rectangular domain with a resolution of 20 x 18.75 km. Prescribed inflow through the model Yucatan Channel was compensated by outflow through the Florida Straits.