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| 长江口邻近海域海水pH的季节变化及其影响因素 |
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石鑫1,2,3,4, 宋金明1,2,3,4, 李学刚1,2,3,4, 袁华茂1,2,3,4, 李宁1,2,3,4, 段丽琴1,2,3,4
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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.中国科学院大学 北京 100049;3.青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 青岛 266237;4.中国科学院海洋大科学研究中心 青岛 266071
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| 摘要: |
| 基于对2015-2016年长江口邻近海域现场调查数据的分析，探讨了其海水pH的季节变化和影响因素。结果表明：长江口邻近海域四季pH在7.76-8.32之间，其中夏季最高，秋季最低；夏季具有明显的分层现象，冬季水体pH垂直分布相对均一。长江冲淡水对长江口邻近海域水体pH的影响是局域性的。浮游植物光合作用是影响春、夏、秋季海水pH区域分布的重要过程。春、冬季节表层海水pH分布受海-气界面CO2交换的影响较大。温度、生物作用及长江冲淡水扩展是导致长江口邻近海域表层海水pH季节变化的主要因素。 |
| 关键词: pH 季节变化 影响因素 长江口邻近海域 |
| DOI：10.11693/hyhz20190200037 |
| 分类号:X55 |
| 基金项目:国家重点研发计划，2017YFA0603204号；中科院战略先导科技专项，XDA19060201号，XDA23050501号；青岛海洋科学与技术国家实验室鳌山科技创新计划项目，2016ASKJ14号。 |
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| SEASONAL CHANGE OF PH IN THE WATERS OFF CHANGJIANG RIVER ESTUARY AND ITS IMPACT FACTORS |
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SHI Xin1,2,3,4, SONG Jin-Ming1,2,3,4, LI Xue-Gang1,2,3,4, YUAN Hua-Mao1,2,3,4, LI Ning1,2,3,4, DUAN Li-Qin1,2,3,4
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1.CAS Key Laboratory of Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Function Laboratory of Marine Ecology and Environmental Sciences, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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| Abstract: |
| Based on the data obtained from in-situ investigations off Changjiang River estuary from 2015 to 2016, seasonal change of pH and the influencing factors of this area was analyzed. The results show that the pH of the area ranged from 7.76 to 8.32, highest in summer and lowest in autumn. Summer stratification phenomenon was observed, while in winter, vertical distribution of pH is relatively uniform. The input of the Changjiang River water regionally influenced the pH distribution. Phytoplankton photosynthesis is the key factor affecting pH distribution in spring, summer, and autumn. In spring and winter, the pH of surface seawater is affected more by the exchange of CO2 at the sea-air interface. Seasonal temperature, biological effects, and the expansion of the Changjiang River dilute water are the main factors leading to the pH seasonal changes in surface seawater in the waters off the Changjiang River estuary. |
| Key words: pH seasonal change impact factors the Changjiang River estuary adjacent waters |
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