EVALUATION OF EFFECTS OF TEMPERATURE AND RIVER DISCHARGE CHANGES DUE TO CLIMATE CHANGE ON HYPOXIA IN THE ARIAKE SEA

Abstract

 Effects of climate change on hypoxia in coastal waters have been concerend. Effects of increase of temperature of air, river water and sea water, and increase of river discharge in a flood due to climate change on stratification and dissolved oxygen(DO) in a coastal region was investigated by quasi global warming numerical experiments using quasi-3D hydrodynamic model and 3D ecosystem model in the Ariake Sea. As a result of this research, the followings are clarified: 1) DO can decrease by the air temperature increse after climate change; 2) hypoxia in the bottom layer can be enhanced by river discharge increase; and 3) the effect of river discharge change can vary according to the geographical relationship.