The possibility of reconstructing the seasonal variability of the ocean using acoustic tomography methods

The possibility of reconstructing by acoustic methods the typical annual variations of the sound velocity profile in different regions of the ocean is investigated. The effect of local seasonal variations of the sound velocity profile on the field received by a system of vertical arrays is simulated for an acceptable number of such systems. The latter is attained by using a mosaic basis, which considerably simplifies the solution of the direct problem, the construction of the perturbation matrix, and the subsequent solution of the inverse problem, as well as by describing the vertical structure of the sound velocity profile within the Karhunen-Loéve basis. The field representation in the vertical modes-horizontal rays approximation is used.