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Vol.11(1989) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10649/136

Title: 内湾の熱収支と貧酸素水塊の形成について
Other Titles: Sea surface heat transfer and its effects on the formation of coastal bay anoxia
Authors: 中村, 由行
一宮, 大祐
早川, 典生
西村, 肇
Authors Affiliation: 長岡技術科学大学建設系
Keywords: Anoxia
coastal sea
heat exchange
density stratification
Issue Date: Oct-1989
Publisher: 長岡技術科学大学
Journal Title: 長岡技術科学大学研究報告
Volume: 11
Start page: 69
End page: 81
Abstract: Field data on coastal anoxia observed during nine years in Osaka Bay were analyzed and examined using a numerical method. Field data suggest that the development of thermal stratification in the middle layer and the subsequent retardation of oxygen transport to the bottom layer is the principle mechanism in the formation of anoxia in the bottom water. The numerical model, which was developed by Nakamura and Nishimura to predict the changes of temperature and oxygen distribution, has been improved by taking account of heat exchange through the air-water interface. The improved model well reproduces the characteristic temperature variation and the dissolved oxygen content in the bottom field condition during the stratification period as well as the mixing period in autumn. Important parameters for the determination of surface heat exchange have further been evaluated by sensitivity analyses. The results show that the vapor pressure in the atmosphere and the wind velocity are the most sensitive to the total heat flux.
language: ja
Contents Version: publisher
URI: http://hdl.handle.net/10649/136
ISSN: 0388-5631
Appears in Collections:Vol.11(1989)

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