On the adiabaticity of acoustic propagation through nongradual ocean structures

To assess the adiabaticity of sound propagation in the ocean is very import ant for acoustic field calculating (forward problem) and tomographic retrie ving(inverse problem). Most of the criterion in the literature is too restr ictive, specially for the nongradual ocean structures. A new criterion of a diabaticity is suggested in this paper. It works for nongradual ocean struc tures such as front and internal solitary waves in shallow-water.