Basic Experiments on Upwelling of Anoxic Water ‘Aoshio’Observed in Tokyo Bay, Japan

Abstract

Aoshio, upwelling of anoxic water, often appears in the bottom of Tokyo Bay from summer to autumn. Since many observations have revealed that the wind-driven flow moving off-shore may induce the stratified bottom water of anoxia to move ashore, basic two-dimensional experiments have been performed to clarify the upwelling and mixing phenomena of two-layered stratified flow system exposed to wind stresses at the surface. It is confirmed that the prediction of Spigel and Imberger is a good agreement with the flow visualization results of upwelling phenomena.