Three Gorges Dam: friend or foe of riverine greenhouse gases?

查看全文 作　　者：Jinren [1,2]Ni;Haizhen [1]Wang;Tao [1]Ma;Rong [1]Huang;Philippe [3]Ciais;Zhe [4]Li;Yao [5]Yue;Jinfeng [1]Chen;Bin [1]Li;Yuchun [6]Wang;Maosheng [7]Zheng;Ting [1]Wang;Alistair [8]G.L.Borthwick

机构地区：[1]Key Laboratory for Water and Sediment Sciences.Ministry of Education,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China;[2]State Envircinmental Proiection Key Laboratory of All Materials Fluxes in River Ecosystems,Ministry of Ecology and Environment,Beijing 100871,China;[3]Laboratoire des Sciences du Climat et de I'Environnement.Inswul Pierre Simon Laplace.Commissariat a I'Seigie Atomique et aux Energies Alternatives.CNRS.Universite de Versailles Saint-Ouentin-en-Yvelines,Gif-sur-Yvette 91191,France;[4]Key Laboratory of Reservoir Enviionment,Chongqing Institute of Green and Intelligent Technology.Chinese Academy of Sciences,Chongqing 400714,China;[5]State Key Laboratoiy of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;[6]Department of Water Environment,China Institute of Waler Resources and Hydropower Reseaich,Beijing 100038,China;[7]MOE Key Laboratory of Regional Energy Systems Optimization.Resources and Environmental Research Academy.North China Electric Power University,Beijing 102206,China;[8]School of Engineering,The University of Edinbuigh,Edinburgh EH93JL.UK

出　　处：《National Science Review》索引2022年第9卷第6期,共9页

基　　金：supported by the National Natural Science Foundation of China (51721006, 92047303, and U2240205)。 摘　　要：Dams are often regarded as greenhouse gas(GHG) emitters. However, our study indicated that the world’s largest dam, the Three Gorges Dam(TGD), has caused significant drops in annual average emissions of CO, CHand NO over 4300 km along the Yangtze River, accompanied by remarkable reductions in the annual export of CO(79%), CH(50%) and NO(9%) to the sea. Since the commencement of its operation in 2003, the TGD has altered the carbonate equilibrium in the reservoir area, enhanced methanogenesis in the upstream, and restrained methanogenesis and denitrification via modifying anoxic habitats through long-distance scouring in the downstream. These findings suggest that ‘large-dam effects’ are far beyond our previous understanding spatiotemporally, which highlights the fundamental importance of whole-system budgeting of GHGs under the profound impacts of huge dams. 关键词：Three Gorges Dam greenhouse gas spatiotemporal variation equilibrium Yangtze River whole system analysis

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Three Gorges Dam: friend or foe of riverine greenhouse gases?

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