气候变化领域集成服务门户(CCPortal): Lakes on the Tibetan Plateau as Conduits of Greenhouse Gases to the Atmosphere

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DOI	10.1029/2017JG004379
	Lakes on the Tibetan Plateau as Conduits of Greenhouse Gases to the Atmosphere
	Yan, Fangping; Sillanpaa, Mika; Kang, Shichang; Aho, Kelly Sue; Qu, Bin; Wei, Da; Li, Xiaofei; Li, Chaoliu; Raymond, Peter A.
发表日期	2018
ISSN	2169-8953
EISSN	2169-8961
卷号	123 期号:7
英文摘要	Lakes play an important role in the global carbon cycle, and littoral zones of lakes are potential hotspots of greenhouse gas production. In this study, we measured the partial pressures of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) in the littoral zones of 17 lakes on the Tibetan Plateau. The littoral zones of lakes on the Tibetan Plateau were supersaturated and acted as sources of CO2, CH4, and N2O to the atmosphere. The average partial pressures of CO2, CH4, and N2O in the surface lake water were 664.8 +/- 182.5, 139.8 +/- 335.6, and 0.3 +/- 0.1 mu atm, respectively. The average diffusive fluxes (and uncentainty intervals) of these three gases were 73.7 (0.9-295.3) mu mol . m(-2) . day(-1), 5.2 (0.0008-45.9) mu mol . m(-2) . day(-1), and 6.5 (0.07-20.9) mu mol . m(-2) . day(-1), respectively. The diffusive fluxes of CO2 in lakes were significantly correlated with dissolved organic carbon, dissolved organic nitrogen, salinity, and water temperature. The diffusive fluxes of N2O were significantly correlated with lake water depth. However, no relationships were found between environmental factors and the CH4 diffusive flux at the scale of this study. CO2 exchange with the atmosphere from saline lakes was found to be higher than from freshwater lakes with equivalent CO2 concentrations by a factor of 2.5 due to chemical enhancement of the gas transfer velocity. Therefore, further study with enhanced spatiotemporal resolution and breadth is needed to better understand the important role played by lakes on the Tibetan Plateau in both regional and global carbon cycles.
学科领域	Environmental Sciences & Ecology; Geology
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111958
作者单位	Lappeenranta Univ Technol, Dept Green Chem, Sch Engn Sci, Mikkeli, Finland
推荐引用方式 GB/T 7714	Yan, Fangping,Sillanpaa, Mika,Kang, Shichang,et al. Lakes on the Tibetan Plateau as Conduits of Greenhouse Gases to the Atmosphere[J]. 中国科学院西北生态环境资源研究院,2018,123(7).
APA	Yan, Fangping.,Sillanpaa, Mika.,Kang, Shichang.,Aho, Kelly Sue.,Qu, Bin.,...&Raymond, Peter A..(2018).Lakes on the Tibetan Plateau as Conduits of Greenhouse Gases to the Atmosphere.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,123(7).
MLA	Yan, Fangping,et al."Lakes on the Tibetan Plateau as Conduits of Greenhouse Gases to the Atmosphere".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 123.7(2018).