Characteristics of methane flux across the water-air interface in subtropical shallow ponds

被引：5

作者：

Long L. ^{[1
]}

Xiao S.-B. ^{[1
]}

Zhang C. ^{[2
,3
]}

Zhang W.-L. ^{[4
]}

Xie H. ^{[4
]}

Li Y.-C. ^{[1
]}

Lei D. ^{[1
]}

Mu X.-H. ^{[1
]}

Zahng J.-W. ^{[1
]}

机构：

[1] College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang

[2] College of Electrical Engineering & New Energy, China Three Gorges University, Yichang

[3] Faculty of Earth Resources, China University of Geosciences, Wuhan

[4] College of Biotechnology & Pharmaceutical Engineering, China Three Gorges University, Yichang

来源：

Xiao, Shang-Bin (shangbinx@163.com) | 1600年 / Science Press卷 / 37期

关键词：

Bubble emission; Diffusion emission; Flux; Methane; Shallow ponds; The water-air interface;

D O I：

10.13227/j.hjkx.201605093

中图分类号：

学科分类号：

摘要：

Five shallow ponds of Yichang were selected to illustrate the characteristics of methane (CH4) in subtropical eutrophic shallow ponds. CH4 flux across the water-air interface was quantified with static floating chamber method for one year. Annual CH4 fluxes of the five ponds were 4.495, 12.702, 6.827, 8.920, 17.560 mg·(m2·h)-1 respectively. Diffusive CH4 fluxes were 0.075, 0.087, 0.118, 0.086, 0.151 mg·(m2·h)-1 respectively and bubble emissions were 4.420, 12.616, 6.709, 8.834, 17.409 mg·(m2·h)-1 respectively. Over 98% of total CH4 flux was bubble emission and CH4 flux was apparently higher than other aquatic ecosystems. So the CH4 flux of shallow waters was high and bubble emission was the dominant way. CH4 emission would be largely underestimated if the research only focus on the diffusion discharge and ignore the bubble emission. © 2016, Science Press. All right reserved.

引用

页码：4552 / 4559

页数：7

共 50 条

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