Behavior of hypoxic water in Tokyo Bay under the coastal upwelling condition determined by continuous observation system
The behavior of hypoxic water under coastal upwelling condition in Tokyo Bay in September, 2012 was clarified by the observation results using the continuous monitoring systems. On 20th September 2012, northeast winds blow up （6 m/s in average）, and drove vertical circulation. During this term, the upwelling of hypoxic bottom water which called as ‘Aoshio’ occurred in northeast coast of Tokyo Bay because of the wind‒driven circulation. In this case, ‘Aoshio’ continued for nine days. At the end of ‘Aoshio’ term, bottom hypoxia water was disappeared because of the upwelling and advection of oxygen rich bottom water from the southern area of Tokyo Bay. Under the vertical circulation condition, bottom water can reach from central area of the bay to northern coast within 4 to 7 days. These continuous monitoring systems are useful to observe sudden events such as ‘Aoshio’ because of their high performance for quick observation.
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
2015
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| Online Access: | http://hdl.handle.net/1834/15562 |
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