A study has been made of steady barotropic flows on the β plane over a bottom topography that varies in a direction inclined to the circles of latitude. The solutions obtained, starting with both the Eulerian and the Lagrangian systems of equations, are shown to be identical in the case of flow over a single-depth discontinuity....
Clarke, R. A., and N. P. Fofonoff. 1969. "Oceanic flow over varying bottom topography." Journal of Marine Research 27, (2). https://elischolar.library.yale.edu/journal_of_marine_research/1155