摘要
2006年9月对长江口邻近海域溶解氧分布特征进行了调查。结果显示,9月长江口邻近海域溶解氧(DO)处于不饱和状态,不饱和程度由表层至底层逐渐加大。9月底层水仍然存在大面积的贫氧区,但是其分布范围明显小于8月的而大于11月的。垂向DO变化特征显示存在强跃层型、跃层型、弱跃层型及无跃层型四种剖面类型,依次代表水体层化强度由强变弱的过程。水体层化是控制底层水体贫氧的主要因素。
The distribution characteristics of dissolved oxygen （DO.） in the sea area adjacent to the Changjiang River estuary in September, 2006 were surveyed. It is shown from the survey results that the DO in the sea area adjacent to the Changjiang River estuary in September was unsaturated, and the unsaturation degree increased with increasing water depth. There was a large area of hypoxia in the bottom water in September, but the hypoxia area in September was obviously less than that in August and larger than that in November. It is shown from the vertical DO distribution characteristics that there were 4 DO profile types, namely, strong pycnocline type, pycnocline type, weak pycnocline type and unstratified type, which represent the processes changing from strong stratification to weak stratification. The water column stratification is the main factor to control the bottom water hypoxia.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2008年第1期65-73,共9页
Advances in Marine Science
基金
我国近海海洋综合调查与评价专项课题--重要三角洲演变规律及重大事件的沉积记录与可持续发展研究(908-02-02-05)
CJ08区块海底底质调查与研究(908-01-CJ08)
留学归国资助项目--中国东海沉积物-海水界面生物地球化学及其对碳循环的指示意义(Q0612)
关键词
溶解氧(DO)
表观耗氧量
贫氧
长江口
dissolved oxygen（DO）
apparent oxygen utilization
hypoxia
Changjiang
