3 . Procedure 



As a result of uncertainty in the type of response, it is 

 prudent to include the effect of density stratification in the 

 formulation of the problem. To allow for the first baroclinic mode 

 in the solutions, a two-layer model with variable depth was chosen. 

 An analytic approach to the problem of hurricane forcing in a basin 

 with realistic bathymetry and shape is not possible. Therefore, a 

 numerical approach was used in this study. An existing linear 

 numerical model for astronomical tides in the Gulf of Mexico ,GOMT, 

 (c.f. Reid and Whitaker, 1981) was adapted to include both the 

 barotropic and baroclinic computations and atmospheric forcing. 

 Information obtained from the numerical model, which is usually 

 unavailable from the recorded data, allows a detailed investigation 

 of the dynamics and other characteristics of the response. Another 

 important advantage of the numerical model is its predictive 

 capability. 



Instead of using the primitive equations describing the two- 

 layer system, normal mode equations were derived using a 

 generalization of the method employed by Veronis and Stommel (1956). 

 There are several advantages in working with the modal form of the 

 equations. In this system the dynamics and energetics of each mode 

 can be examined separately. Interaction between modes, due to 

 coupling caused by varying depth, can be investigated in terms of 

 energy transfer. Open boundary conditions are facilitated in terms 

 of the modes, particularly if outward radiation of wave energy is 

 allowed. In addition, the layer variables such as the free surface 



