Upwelling of oxygen-depleted water (Sumishio) in Omura Bay,Japan |
| |
Authors: | Tetsuya Takahashi Hideaki Nakata Keiji Hirano Kazumi Matsuoka Mitsunori Iwataki Hitoshi Yamaguchi Tomoyuki Kasuya |
| |
Institution: | (1) Institute for East China Sea Research, Nagasaki University, Nagasaki 852-8521, Japan;(2) Faculty of Fisheries, Nagasaki University, Nagasaki 852-8521, Japan;(3) Nagasaki Prefectural Institute of Fisheries, Nagasaki 851-2212, Japan;(4) Nagasaki Prefectural Institute for Environmental Research and Public Health, Nagasaki 856-0026, Japan;(5) Present address: Graduate School of Frontier Science, The University of Tokyo, 1-15-1 Minamidai, Nakano-ku, Tokyo 164-8639, Japan |
| |
Abstract: | Wind-induced circulation and the distribution of hypoxia corresponding to the upwelling of oxygen-depleted water (called “Aoshio”
in Japan and “Sumishio” locally in Omura Bay) in Omura Bay, Japan, was examined field observations and by three-dimensional
modeling. During the calm weather in summer, well-mixed strait water, in rich oxygen at the mouth of the bay intruded into
the middle layer of the bay, southward and northward along the west and east coast, respectively, forming basin-scale cyclonic
circulation. A stagnant water mass was formed below the center of this cyclonic circulation, and it became hypoxic water.
As a result of the prevailing strong southeast (northeast) wind, the bottom hypoxia moved in a southeasterly (northeasterly)
direction. This induces the upwelling of hypoxic water, accompanied by mass mortality of marine organisms. |
| |
Keywords: | Wind cyclonic circulation oxygen-depleted water Omura Bay |
本文献已被 SpringerLink 等数据库收录! |
|