title: [Partial pressure and diffusion flux of dissolved carbon dioxide in the mainstream and tributary of the central Three Gorges Reservoir in summer].
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 x (m2 x d)(-1) and 39.58 mmol x (m2 x 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.
authors.forename: Shuang
authors.initials: S
authors.lastname: Li
authors.forename: Yu-Chun
authors.initials: YC
authors.lastname: Wang
authors.forename: Man
authors.initials: M
authors.lastname: Cao
authors.forename: Hui-Jun
authors.initials: HJ
authors.lastname: Qian
authors.forename: Tao
authors.initials: T
authors.lastname: Xu
authors.forename: Zi-Ran
authors.initials: ZR
authors.lastname: Zhou
authors.forename: Bing
authors.initials: B
authors.lastname: Deng
authors.forename: Fu-Shun
authors.initials: FS
authors.lastname: Wang
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis*; D057965:Carbon Sequestration; D002681:China; D004058:Diffusion; D004784:Environmental Monitoring; D010313:Partial Pressure; D045483:Rivers / Q000737:chemistry*; D012621:Seasons
chemical_list: D002245:Carbon Dioxide