Re ̄ection of equatorial Kelvin waves at eastern ocean boundaries Part II: Paci®c and Atlantic Oceans

The e€ect of viscosity, non linearities, incident wave period and realistic eastern coastline geometry on energy ̄uxes are investigated using a shallow water model with a spatial resolution of 1/4 degree in both meridional and zonal directions. Equatorial and mid-latitude responses are considered. It is found that (1) the in ̄uence of the coastline geometry and the incident wave period is more important for the westward energy ̄ux than for the poleward ̄ux, and (2) the e€ect of the inclination of the eastern ocean boundary on the poleward energy ̄ux, for the Paci®c and Atlantic Oceans, decline as the period of the incident wave increases. Furthermore, the model simulations suggest that the poleward energy ̄uxes from meridional boundaries give plausible results for motions of seasonal and annual periods. For comparatively shorter periods, a realistic coastline geometry has to be included for more accurate results. It is recommended that any numerical model involving the re ̄ection of baroclinic Rossby waves (of intraseasonal, seasonal or annual periods) on the eastern Paci®c or Atlantic Oceans, should consider the e€ect of the coastline geometry in order to improve the accuracy of the results.