夏、冬季黄东海溶解氧的分布特征研究  

DISTRIBUTION OF DISSOLVED OXYGEN IN THE YELLOW SEA AND EAST CHINA SEA IN SUMMER AND WINTER

作　　者：池连宝 宋秀贤[1,2,3] 袁涌铨 周鹏[1,2,3] 曹西华 俞志明[1,2,3] 

机构地区：[1]中国科学院海洋研究所中国科学院海洋生态与环境科学重点实验室,青岛266071 [2]青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室,青岛266237 [3]中国科学院大学,北京100049

出　　处：《海洋与湖沼》2017年第6期1337-1345,共9页Oceanologia Et Limnologia Sinica

基　　金：中国科学院战略性先导科技专项(A类);XDA11020601号;国家重点研发计划;2016YFE0101500号;国家自然科学基金-山东省人民政府联合资助项目;U1606404号

摘　　要：本文基于2015年8月和12月的现场调查资料,分析了我国黄东海溶解氧(DO)分布特征与季节变化,并对其影响因素进行了探讨。结果表明:黄东海DO的分布存在明显的时空差异。夏季,DO质量浓度的变化范围为1.92—11.35mg/L,南黄海冷水团海域存在中层水体DO最大值现象;长江口附近(30.73°—32.30°N,122.96°—124.60°E)与浙江近海(28.43°—29.40°N,121.97°—122.63°E)底层存在低氧区(DO<3mg/L),面积可达14800km2;且东海外侧底层(28.88°—29.70°N,124.08°—124.90°E)存在DO<4mg/L的DO低值区。冬季,DO质量浓度变化范围为4.81—10.29mg/L,总体上呈现近岸高、外海低的分布特征;南黄海中部(33.80°—34.66°N,123.52°—124.23°E)与北部(35.50°—36.36°N,122.96°—123.82°E)底层水体DO质量浓度低于6mg/L,DO最低值为4.81mg/L。黄东海DO分布特征及其变化受物理过程与生物化学过程等多种因素的综合影响,且表现出明显的时空分布差异。Using the field data of August and December 2015, we analyzed the distribution and seasonal variation of dissolved oxygen（DO） in Yellow Sea and East China Sea（ECS） and the influencing factors. The results show obvious spatial and temporal distributions of DO in the study area. In summer, DO content ranged 1.92—11.35 mg/L. In the southern Yellow Sea Cold Water（YSCW）, the DO maximum occurred in the middle layer. The hypoxic zone（DO3 mg/L） was observedin the bottom water of Changjiang（Yangtze） River estuary（30.73°—32.30°N, 122.96°—124.60°E） and near-shore coastal waters off Zhejiang（28.43°—29.40°N, 121.97°—122.63°E）, which covered an area of 14800 km2. Beyond ECS（28.88°—29.70°N, 124.08°—124.90°E）, DO dropped to 4 mg/L in bottom water. In winter, DO content varied from 4.81 to 10.29 mg/L, and decreased offshore gradually, which decreased to 6 mg/L in the middle and northern parts of the southern Yellow Sea. The DO distribution in the study area was affected by multiple factors and varied in season and space, of which temperature and salinity were the major ones in winter. And other derivative factors, including water column stratification, organic matter decomposition and vertical convection etc., played an important role in summer.

关 键 词：黄东海 DO分布特征 季节变化 影响因素 

分 类 号：P734[天文地球—海洋化学]