乳山湾邻近海域低氧现象及成因浅析  

Hyposia and Its Cause of Formation in the Adjacent Waters of Rushan Bay

作　　者：冉祥滨[1,2] 臧家业[1,2] 韦钦胜[1,2] 郭景松[1,3] 尹晓斐[1,2] 刘玮[1,2] 刘军[1,2] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋生态环境科学与工程国家海洋局重点实验室,山东青岛266061 [3]海洋环境科学与数值模拟国家海洋局重点实验室,山东青岛266061

出　　处：《海洋科学进展》2012年第3期347-356,共10页Advances in Marine Science

基　　金：乳山湾外海低氧区调查与研究--中国近海海洋综合调查与评价专项课题(908-01-BC14)

摘　　要：根据2009-06-2009-09及2010-05-2010-06在乳山湾及其毗邻海域的综合调查,分析了该海域溶解氧的变化,初步探讨了影响溶解氧变化及底层低氧形成的原因。结果表明,夏季乳山湾邻近海域存在季节性低溶解氧区,溶解氧在6,7月份相对较高,而在8,9月份相对较低,最低值出现在8月份,为3.21mg/L(饱和度为35.5%),表观耗氧量为5.82mg/L。乳山湾外邻近水域溶解氧略高于湾口和湾内。底层溶解氧水平受到潮汐的影响,具有较大的周日波动性,变化范围介于3.74～8.26mg/L;在落潮时质量浓度降低而在涨潮时质量浓度升高。在这一区域存在较为强烈的温、盐跃层,从而限制了表、底层溶解氧的交换,而COD质量浓度的升高为这一区域的耗氧过程提供了一定的物质基础。潮汐、黄海冷水团的顶托作用、有机物质在底层水域的氧化作用以及底泥耗氧过程导致底层溶解氧的亏损。The cruises on hypoxia investigation were carried out in the mouth of Rushan Bay and its adja- cent area in both June to September, 2009 and May to June, 2010. Dissolved oxygen and cause of hyposia formation were analyzed. The result indicated that there was a low-oxygen area in Rushan Bay mouth and its adjacent waters. The DO was higher in surface water but lower in bottom. The minimum value of DO （3.21 mg/L） was found at the bottom in August, oxygen saturation was 35.5% and apparent oxygen uti- lization （AOU） was 5.82 mg/L. The DO was lower in high tide level and higher in low tide, with distinct diurnal variations （3.74-8.26 mg/L）. Yellow Sea Cold Water Mass, tide, water stratification, high con- centration of organic substance, and sediment oxygen demand were the major factors causing the formation of the hypoxia.

关 键 词：溶解氧 低氧区 表观耗氧量 乳山湾 

分 类 号：X834[环境科学与工程—环境工程]