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夏、冬季黄东海溶解氧的分布特征研究
池连宝1,2,3, 宋秀贤1,2,3, 袁涌铨1,2, 周鹏1,2,3, 曹西华1,2, 俞志明1,2,3
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
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。
关键词:  黄东海  DO分布特征  季节变化  影响因素
DOI:10.11693/hyhz20170500142
分类号:P734
基金项目: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。
DISTRIBUTION OF DISSOLVED OXYGEN IN THE YELLOW SEA AND EAST CHINA SEA IN SUMMER AND WINTER
CHI Lian-Bao1,2,3, SONG Xiu-Xian1,2,3, YUAN Yong-Quan1,2, ZHOU Peng1,2,3, CAO Xi-Hua1,2, YU Zhi-Ming1,2,3
1.CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China;3.University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:
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—11.35mg/L. In the southern Yellow Sea Cold Water (YSCW), the DO maximum occurred in the middle layer. The hypoxic zone (DO<3mg/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 14800km2. Beyond ECS (28.88°—29.70°N, 124.08°—124.90°E), DO dropped to <4mg/L in bottom water. In winter, DO content varied from 4.81 to 10.29mg/L, and decreased offshore gradually, which decreased to <6mg/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.
Key words:  Yellow Sea and East China Sea  DO distribution  seasonal variation  influencing factors
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