Low frequency edge waves over a trench-ridge topography adjoining a straight coastline |
| |
| Authors: | J. P. Louis |
| |
| Affiliation: | School of Applied Science, Riverina College of Advanced Education , Wagga Wagga, N.S.W., Australia |
| |
| Abstract: | Abstract The possible interaction of trapped midoceanic boundary waves with a nearby coastline is examined by considering a step trench-ridge topography adjoining a semi-infinite straight coastline. The full dispersion equation, including the effect of the earth's rotation, is derived for long waves over this topography. It is shown that the presence of the coastline begins to have a significant effect on the behaviour of quasigeostrophic ridge waves whenever the wave length is greater than three times the ridge coastline separation. As an example, the dispersion curves are presented for the topography of the Heceta Bank off the coast of Oregon and it is conjectured that the presence of this off-shore ridge may provide an explanation for the anomalous direction of propagation of the 0.1 c.p.d. shelf wave reported by Mooers and Smith (1968). |
| |
| Keywords: | |
|
|
