Abstract
To determine the factors contributing to large-scale blue tide occurrences, blue tide distributions captured from satellite images were estimated using the estimation model for blue tides. This model was developed based on the observation results of the optical properties of Tokyo Bay and numerical simulation by a three-dimensional hydrodynamics and ecological model. By complementing the information from the results of both satellite image analysis to estimate the blue tide reflectance and the numerical simulation to calculate the dissolved oxygen (DO) concentration, the upwelling areas of sulfide-containing anoxic water were distinguished from those of non-sulfide-containing anoxic water.
