The use of static vertical stability criteria in oceanography is discussed and two basic types of such stability parameters are derived. It is shown how these can be determined by using sound velocity as one of the variables. Computation can be simplified by means of a graph.
Pollak, M. J.. 1954. "Static stability parameters in oceanography." Journal of Marine Research 13, (1). https://elischolar.library.yale.edu/journal_of_marine_research/806