其他摘要：The mechanism of the everlasting occurrence of huge hypoxic water mass in Ise Bay has not been elucidated. One of the causes that disturbs our understanding for the phenomenon is the existence of relatively large fluctuations (i.e. short-term variation) contained in the dissolved oxygen data in the middle and the lower layer of the bay. The three-layered box model was developed to investigate the relation between the fluctuation and the water exchange with the Pacific Ocean. The monthly data for the water exchange rates through the middle and the lower layer as well as the dissolved oxygen concentration of the two layers from 1986 to 2015 were analyzed by the model. The fluctuations in the oxygen data were well reproduced by the calculation. This results proved our view for the cause of the oxygen fluctuation and assured the further development of studies for the hypoxic water of Ise Bay.
