| 摘要: |
| 台湾海峡海域1983－1988年多次调查资料表明，该海域夏季表现耗氧量（AOU）变化幅度较大，其分布特征呈近岸、底层高，向上层、外海递减，诸上升流是其主要控制因素。各上升流区AOU与温度、盐度、诸营养盐呈显著相关关系。PO4／AOU与NO3／AOU比值平均分别为0.0058和0.076。上升流海域夏季初始营养盐[PO4,pre和[NO3,pre较低，而再生营养盐高，是现场营养盐的主要部分。有机物质分解耗氧对AOU的贡献比浮游动物等呼吸耗氧更重要。 |
| 关键词: 表现耗氧量 初始营养盐 近岸上升流 台湾海峡 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目，4860241号 |
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| STUDY ON APPARENT OXYGEN UTILIZATION IN THE TAIWAN STRAIT AREA |
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Chen Shuitu, Ruan Wuqi
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Fujian Institute of Oceanology, Xiamen 361012
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| Abstract: |
| Taiwan Strait oceanographic survey data (temperature, salty, dissolved oxygen and nutrients of NO3, PO4, SiO3, were measured at site) obtained in 1983 to 1988 showed that apparent oxygen utilization (AOU, calculated by “[O2,- [O3;” based on survey data at site) in the whole Taiwan Strait was relatively low in winter and had more change in summer. The nearshore and bottom waters were characterized by relatively high and more changing AOU with distributions decreasing upward and offshoreward. There was a close layer of large vertical changes of AOU in the local upper water of the offshore areas. Upwelling controlled the characteristics of AOU distribution in the areas in summer. Significant correlations between AOU and temperature, salinity, nutrients [PO4, and [NO3],-, respectively, were found in the upwelling areas.
The averages of PO4/AOU and NO3/AOU ratios in the areas were respectively 0.0058 and 0.076, and smaller than the Redfield ratio. There were the relatively low preformed nutrients concentrations, but the high concentrations of field and regenerated nutrients in the nearshore and bottom water areas. The regenerated nutrients comprised a major part of the field nutrients in the upwelling areas in summer. |
| Key words: Apparent oxygen utilization, Preformed nutrients, Nearshore upper water, Taiwan Strait |
