Hayes and Halpern (1976) have calculated the rays associated with internal waves in the semidiurnal frequency range. This they do to show how the change of the trajectories of these rays, due to density changes occurring during an upwelling event, can explain the decrease of semidiumal activity observed at their mooring site. Here we consider the additional effect of the mean flow generated by an upwelling event....
Kroll, John. 1976. "The effect of mean flow during an upwelling event on the rays of internal waves." Journal of Marine Research 34, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1368