Carbon emission from global hydroelectric reservoirs revisited

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	Carbon emission from global hydroelectric reservoirs revisited
	Li, Siyue; Zhang, Quanfa
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2014
英文摘要	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. Here, we revisit GHG emission from hydropower reservoirs by considering reservoir surface area, drawdown zone and reservoir downstream. Our estimates demonstrate around 301.3 Tg carbon dioxide (CO2)/year and 18.7 Tg methane (CH4)/year from global hydroelectric reservoirs, which are much higher than recent observations. The sum of drawdown and downstream emission, which is generally overlooked, represents 42 % CO2 and 67 % CH4 of the total emissions from hydropower reservoirs. Accordingly, the global average emissions from hydropower are estimated to be 92 g CO2/kWh and 5.7 g CH4/kWh. Nonetheless, global hydroelectricity could currently reduce approximate 2,351 Tg CO(2)eq/year with respect to fuel fossil plant alternative. The new findings show a substantial revision of carbon emission from the global hydropower reservoirs.
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/354]
专题	中国科学院武汉植物园
推荐引用方式 GB/T 7714	Li, Siyue,Zhang, Quanfa. Carbon emission from global hydroelectric reservoirs revisited[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2014.
APA	Li, Siyue,&Zhang, Quanfa.(2014).Carbon emission from global hydroelectric reservoirs revisited.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH.
MLA	Li, Siyue,et al."Carbon emission from global hydroelectric reservoirs revisited".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2014).