New schemes of ocean acoustic tomography

Ocean acoustic tomography based on modal horizontal refraction/phase differ ence measurement has been developed in recent years. In this paper, potenti al opportunities for remotely sensing various interesting ocean dynamic str uctures by using the modal-horizontal-reaction tomography and modal-phase t omography are discussed, including: (1) retrieval of the 3-D structure of a mesoscale eddy, (2) monitoring of the transverse component of the current, (3) retrieval of ocean frontal parameters, and (4) acoustically diagnosing internal solitary waves (ISW) in the coastal zone.