Abstract:

The real-time motion state of large-scale surface ocean can be obtained by remote sensing technology, while the motion state of the interior ocean can only be obtained by the fixed point observation, which cannot achieve the real-time monitoring of a large area. Based on the basic principles of ocean dynamics, we construct a relationship model between ocean surface and internal motion state in three-dimensional space under the barotropic shallow water continental shelf model. Based on the data of ocean surface velocity and direction detected by remote sensing, combining with the state parameters of wave height and speed, we use the finite difference method to obtain the information of speed and direction of the undercurrent. The inversion results conform to the law of ocean dynamics, reflect the overall distribution of the undercurrent and expand the application range of radar remote sensing.

Key words: remote sensing measurement, ocean movement, finite difference method, three-dimensional hydrodynamic model