![]() Giles J (2006) Methane quashes green credentials of hydropower. Environ Sci Technol 45(23):9866–9873įearnside PM, Pueyo S (2012) Greenhouse-gas emissions from tropical dams. Ecosystems 10:171–184ĭelsontro T, Kunz MJ, Kempter T, Wuest A, Wehrli B, Senn DB (2011) Spatial heterogeneity of methane ebullition in a large tropical reservoir. Glob Chang Biol 19:19–32Ĭole JJ, Prairie YT, Caraco NF, McDowell WH, Tranvik LJ, Striegl RG, Duarte CM, Kortelainen P, Downing JA, Middelburg JJ, Melack J (2007) Plumbing the global carbon cycle: integrating inland waters into the terrestrial carbon budget. J Geophys Res 114, D18301Ĭhen H, Zhu Q, Peng CH, Wu N, Wang YF, Fang XQ, Hong J, Xiang WH, Chang J, Deng XW, Yu GR (2013) Methane emissions from rice paddies natural wetlands, lakes in china: synthesis new estimate. Science 331:50īaulch HM, Dillon PJ, Maranger R, Schiff SL (2011) Diffusive and ebullitive transport of methane and nitrous oxide from streams: are bubble-mediated fluxes important? J Geophys Res 116, G04028Ĭhen H, Wu YY, Yuan XZ, Gao YS, Wu N, Zhu D (2009) Methane emissions from newly created marshes in the drawdown area of the Three Gorges Reservoir. Nat Geosci 4:593–596īastviken D, Tranvik LJ, Downing JA et al (2011) Freshwater methane emissions offset the continental carbon sink. The new findings show a substantial revision of carbon emission from the global hydropower reservoirs.īarros N, Cole JJ, Tranvik LJ, Prairie YT, Bastviken D, Huszar VLM, del Giorgio P, Roland F (2011) Carbon emission from hydroelectric reservoirs linked to reservoir age and latitude. Nonetheless, global hydroelectricity could currently reduce approximate 2,351 Tg CO 2eq/year with respect to fuel fossil plant alternative. Accordingly, the global average emissions from hydropower are estimated to be 92 g CO 2/kWh and 5.7 g CH 4/kWh. ![]() ![]() The sum of drawdown and downstream emission, which is generally overlooked, represents 42 % CO 2 and 67 % CH 4 of the total emissions from hydropower reservoirs. Our estimates demonstrate around 301.3 Tg carbon dioxide (CO 2)/year and 18.7 Tg methane (CH 4)/year from global hydroelectric reservoirs, which are much higher than recent observations. Here, we revisit GHG emission from hydropower reservoirs by considering reservoir surface area, drawdown zone and reservoir downstream. Substantial greenhouse gas (GHG) emissions from hydropower reservoirs have been of great concerns recently, yet the significant carbon emitters of drawdown area and reservoir downstream (including spillways and turbines as well as river reaches below dams) have not been included in global carbon budget.
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