Methane Ebullition in Temperate Hydropower Reservoirs and Implications for US Policy on Greenhouse Gas Emissions

被引:16
|
作者
Miller, Benjamin L. [1 ,3 ]
Arntzen, Evan V. [1 ]
Goldman, Amy E. [1 ]
Richmond, Marshall C. [2 ]
机构
[1] Pacific Northwest Natl Lab, Ecol Grp, Richland, WA 99352 USA
[2] Pacific Northwest Natl Lab, Hydrol Grp, Richland, WA 99354 USA
[3] Univ Washington, Sch Aquat & Fishery Sci, Seattle, WA 48109 USA
关键词
Methane; Hydropower; Reservoir; Temperate; Greenhouse gas; Ebullition; HYDROELECTRIC RESERVOIRS; CARBON-DIOXIDE; PHYSICAL CONTROLS; UNITED-STATES; WIND-SPEED; HOT-SPOTS; WATER; LAKE; FLUXES; ATMOSPHERE;
D O I
10.1007/s00267-017-0909-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The United States is home to 2198 dams actively used for hydropower production. With the December 2015 consensus adoption of the United Nations Framework Convention on Climate Change Paris Agreement, it is important to accurately quantify anthropogenic greenhouse gas emissions. Methane ebullition, or methane bubbles originating from river or lake sediments, has been shown to account for nearly all methane emissions from tropical hydropower reservoirs to the atmosphere. However, distinct ebullitive methane fluxes have been studied in comparatively few temperate hydropower reservoirs globally. This study measures ebullitive and diffusive methane fluxes from two eastern Washington reservoirs, and synthesizes existing studies of methane ebullition in temperate, boreal, and tropical hydropower reservoirs. Ebullition comprises nearly all methane emissions (> 97%) from this study's two eastern Washington hydropower reservoirs to the atmosphere. Summer methane ebullition from these reservoirs was higher than ebullition in six southeastern U.S. hydropower reservoirs, however it was similar to temperate reservoirs in other parts of the world. Our literature synthesis suggests that methane ebullition from temperate hydropower reservoirs can be seasonally elevated compared to tropical climates, however annual emissions are likely to be higher within tropical climates, emphasizing the possible range of methane ebullition fluxes and the need for the further study of temperate reservoirs. Possible future changes to the Intergovernmental Panel on Climate Change and UNFCCC guidelines for national greenhouse gas inventories highlights the need for accurate assessment of reservoir emissions.
引用
收藏
页码:615 / 629
页数:15
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