ADCIRC: An Advanced Three-Dimensional Circulation Model for Shelves, Coasts, and Estuaries. Report 6. Development of a Tidal Constituent Database for the Eastern North Pacific.

Abstract : This report describes the application of ADCIRC-2DDI, a two-dimensional depth-averaged barotropic hydrodynamic model, to the eastern North Pacific in order to develop a tidal constituent database. Issues that are emphasized in the development of the Eastern North Pacific Tidal (ENPACT) model include the specification of a geometrically and hydrodynamically simple open boundary, the use of large domains, and the advantages of using a graded finite element grid to selectively resolve flow features of interest. The ENPACT model is coupled to a finite element global ocean model at the open boundary and forced with five diurnal and semidiurnal astronomical tidal constituents (K1, O1, M2, S2, and N2). Tidal potential forcing is applied to the interior of the domain for the same constituents. The structures of the various tides are examined and the results of the tidal simulations are compared with field data at 72 fixed tidal elevation stations. (AN)