Three-dimensional salt tide model salinity simulation initial field generation method

The invention relates to the technical field of marine science, in particular to a three-dimensional salt tide model salinity simulation initial field generation method. The method comprises the following steps: acquiring historical hydrological combination simulation correction data of a three-dimensional salt tide model, and performing salinity extraction calculation on the historical hydrological combination simulation correction data to obtain a three-dimensional salt tide salinity value so as to construct a three-dimensional salinity field database; performing time sequence acquisition and salinity index calculation on the three-dimensional salinity field database to obtain a three-dimensional salinity layering coefficient so as to generate a three-dimensional salinity layering coefficient field; acquiring inversion surface salinity field data at a remote sensing typical moment, and performing data matching extraction on the three-dimensional salinity layering coefficient field to obtain a three-dimensio