11. In particular, this shows that the buoyancy frequency is an upper limit of allowed internal wave frequencies. 12. Another example is internal waves , which can be transmitted along the interface of two water masses of different densities. 13. Other solitons occur as the undersea internal waves , initiated by seabed topography, that propagate on the oceanic pycnocline. 14. Internal waves can act as nutrient pumps, bringing plankton and cool nutrient-rich water up to the surface.15. Similarly, as internal waves and bores move vertically, surface-dwelling larval organisms are carried toward the shore. 16. Internal waves are usually distinguished from Rossby waves, which are influenced by the change of Coriolis frequency with latitude.17. The dispersion relation for such waves is curious : For a freely-propagating internal wave propagation within a waveguide. 18. Improvement of tide modeling by observing more long period components such as costal interactions, internal waves , and tidal energy dissipation. 19. Water can be moved through coral reefs in various ways, including current rings, surface waves, internal waves and tidal changes. 20. These are a form of internal wave driven by the local tidal flow forcing the stratification against sloping areas of the shelf face.