Methane emissions from the surface of the Three Gorges Reservoir

doi:10.1029/2011JD016244

	Methane emissions from the surface of the Three Gorges Reservoir
	Chen, Huai 2,3; Yuan, Xingzhong 1; Chen, Zhongli 1; Wu, Yuyuan 1; Liu, Xianshu 5; Zhu, Dan 4; Wu, Ning 4; Zhu, Qiu'an 2,3; Peng, Changhui 2,3; Li, Weizhong 3
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2011-11-09
卷号	116 页码:D21306(1-5)
ISSN号	2169-897X
DOI	10.1029/2011JD016244
产权排序	5
文献子类	Article
英文摘要	After our previous study about methane (CH4) emissions from littoral marshes of the Three Gorges Reservoir (TGR), Chinese dams have raised a world-wide concern. Through measurements from the surface of the TGR, a CH4 emission rate was recorded as 0.26 +/- 0.38 mg CH4 m(-2) h(-1) (Mean +/- SD), relatively low compared with those from other hydropower reservoirs. We also recorded CH4 emission rate from the surface of downstream water, which was also relatively low (0.24 +/- 0.37 mg CH4 m(-2) h(-1)). Such result may indicate that TGR is not a great CH4 emitter (not "CH4 menace"). One possible reason for such a low emission rate is that measures to maintain water quality and protect environment and ecosystem decrease the input of organic materials (for methanogenesis), which in turn limits the CH4 production in the sediment of the TGR. We also found that CH4 emission from the flooding drawdown area (0.29 +/- 0.37 mg CH4 m(-2) h(-1)) was higher than other permanently flooded sites (0.23 +/- 0.38 mg CH4 m(-2) h(-1)). Because of annual vegetation re-growth, the drawdown zone is the especially important carbon source for methanogenesis in flooding season. Interestingly, we also observed that mean CH4 emission was significantly higher in winter than in spring and summer. This was partly due to seasonal dynamics of hydrology. In order to estimate the net CH4 emissions caused by the reservoir and reservoir operation, the best approach would be Life Cycle Analysis.
学科主题	Earth Sciences
URL标识	查看原文
WOS关键词	GREENHOUSE-GAS EMISSIONS ; HYDROELECTRIC RESERVOIRS ; CARBON-DIOXIDE ; DAM ; PERSPECTIVE ; DYNAMICS ; FLUXES ; WATER ; LAKE
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000297051000002
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/29848]
专题	成都生物研究所_生态研究
作者单位	1.Chongqing Univ, Coll Resources & Environm, Chongqing 400030, Peoples R China; 2.Univ Quebec, Inst Environm Sci, Montreal, PQ H3C 3P8, Canada; 3.NW Agr & Forest Univ, Coll Forestry, Lab Ecol Forecasting & Global Change, Yanglin 712100, Peoples R China; 4.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China 5.Harbin Inst Technol, Sch Municipal & Environm Engn, Harbin 150030, Peoples R China;
推荐引用方式 GB/T 7714	Chen, Huai,Yuan, Xingzhong,Chen, Zhongli,et al. Methane emissions from the surface of the Three Gorges Reservoir[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2011,116:D21306(1-5).
APA	Chen, Huai.,Yuan, Xingzhong.,Chen, Zhongli.,Wu, Yuyuan.,Liu, Xianshu.,...&Li, Weizhong.(2011).Methane emissions from the surface of the Three Gorges Reservoir.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,116,D21306(1-5).
MLA	Chen, Huai,et al."Methane emissions from the surface of the Three Gorges Reservoir".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 116(2011):D21306(1-5).