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We have often seen solitary waves of depression near the surface; during the summertime COAST cruises they were a large part of the internal wave signal. This winter (Jan '03) we were surprised to see large solitary waves on the sea-floor. While theoretically their presence is not surprising, there have not been many good observations of the phenomena.
J. M. Klymak and J. N. Moum, Internal Solitary Waves of Elevation Advancing on a Shoaling Shelf, 2003. Geophys. Res. Lett. Vol. 30, No 20, 2045, doi10.1029/2003GL017706
http://mixing.coas.oregonstate.edu/people/jklymak2/coast/2003GL017706final.pdf
I have also been involved with the research that Jim and Sasha have been working on. This has resulted in one paper that has been submitted to JPO, with several more in preparation.
J.N. Moum, A. Perlin, J.M. Klymak, M.D. Levine, T. Boyd and P.M. Kosro (2003): "Convectively-driven mixing in the bottom boundary", submitted to J. Phys. Oceanogr.
http://mixing.coas.oregonstate.edu/papers/convection.pdf
K. Edwards, P. MacCready, J. Moum, G. Pawlak, J. Klymak and A. Perlin, 2004, "Form Drag and Mixing Due to Tidal Flow Past a Sharp Point", J. Phys. Oceanogr., in press.
Jody Klymak - jklymak@uvic.ca