| 三峡库区库中干流及支流水体夏季二氧化碳分压及扩散通量 |
| |
| 引用本文： | 李双,王雨春,操满,钱慧君,许涛,周子然,邓兵,汪福顺.三峡库区库中干流及支流水体夏季二氧化碳分压及扩散通量[J].环境科学,2014,35(3):885-891. |
| |
| 作者姓名： | 李双 王雨春 操满 钱慧君 许涛 周子然 邓兵 汪福顺 |
| |
| 作者单位： | 上海大学环境与化学工程学院, 上海 200444;中国水利水电科学研究院水环境研究所, 北京 100038;上海大学环境与化学工程学院, 上海 200444;上海大学环境与化学工程学院, 上海 200444;中国水利水电科学研究院水环境研究所, 北京 100038;华东师范大学河口海岸国家重点实验室, 上海 200633;华东师范大学河口海岸国家重点实验室, 上海 200633;上海大学环境与化学工程学院, 上海 200444 |
| |
| 基金项目： | 国家水体污染控制与治理科技重大专项（2012ZX07104-001）；国家自然科学基金项目（42173128）；上海市教委基金项目（12YZ017） |
| |
| 摘 要： | 以三峡库区库中干流以及主要支流——梅溪河为研究区,于2013年5月对该区域水体中溶解二氧化碳分压(pCO2)进行了走航观测.结果表明,夏季梅溪河表层pCO2为6.8~7.5 Pa,三峡库区库中长江干流表层pCO2为201.4~210.2 Pa.在库区干、支流交汇的过渡区水体剖面上,表层水体pCO2最低为53.5 Pa,随着水深增加,pCO2急剧增大,在3 m处达到约210Pa后基本保持不变.通过计算,库区支流梅溪河和库区干流表层水体的CO2释放通量分别为-7.48 mmol·(m2·d)-1和39.58 mmol·(m2·d)-1.结果表明,库区支流梅溪河表现为大气中CO2的"汇",而库区干流表现为CO2的"源",库区干、支流水体在CO2的释放上有显著差异.
|
| 关 键 词： | 温室气体 二氧化碳分压 二氧化碳通量 三峡库区 梅溪河 |
| 收稿时间： | 7/1/2013 12:00:00 AM |
| 修稿时间： | 9/9/2013 12:00:00 AM |
Partial Pressure and Diffusion Flux of Dissolved Carbon Dioxide in the Mainstream and Tributary of the Central Three Gorges Reservoir in Summer |
| |
| LI Shuang,WANG Yu-chun,CAO Man,QIAN Hui-jun,XU Tao,ZHOU Zi-ran,DENG Bing and WANG Fu-shun.Partial Pressure and Diffusion Flux of Dissolved Carbon Dioxide in the Mainstream and Tributary of the Central Three Gorges Reservoir in Summer[J].Chinese Journal of Environmental Science,2014,35(3):885-891. |
| |
| Authors: | LI Shuang WANG Yu-chun CAO Man QIAN Hui-jun XU Tao ZHOU Zi-ran DENG Bing and WANG Fu-shun |
| |
| Institution: | School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;Department of Water Environment, China Institute of Water Resources and Hydroelectric Power Research, Beijing 100038, China;School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;Department of Water Environment, China Institute of Water Resources and Hydroelectric Power Research, Beijing 100038, China;State Key Laboratory of Estuarine and coastal Research, East China Normal University, Shanghai 200633, China;State Key Laboratory of Estuarine and coastal Research, East China Normal University, Shanghai 200633, China;School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China |
| |
| Abstract: | This study investigated the partial pressure of CO2 (pCO2) in the mainstream of the Three Gorges Reservoir and its tributary (Meixi River) in May 2013. Results showed that pCO2 in the surface water of the Meixi River and mainstream of the Three Gorges Reservoir was 6.8-7.5 Pa and 201.4-210.2 Pa, respectively. At the mixing area between the Meixi River and the mainstream of Changjiang, the lowest value of pCO2 in surface water was 53.5 Pa, and pCO2 gradually increased downwardly. Below 3 m in depth, pCO2 kept the stable value of around 210 Pa. Based on the calculation results, the emission flux of CO2 in the Meixi River and the mainstream of the central Three Gorges Reservoir was about -7.48 mmol·(m2·d)-1 and 39.58 mmol·(m2·d)-1, respectively. These results showed that the Meixi River is a sink for atmospheric CO2, and the mainstream of the Three Gorges Reservoir is a source for atmospheric CO2. |
| |
| Keywords: | greenhouse gas partial pressure of carbon dioxide diffusion flux of carbon dioxide the Three Gorges Reservoir Meixi River |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境科学》浏览原始摘要信息 |
| 点击此处可从《环境科学》下载免费的PDF全文 |
|
