globalchange  > 气候减缓与适应
DOI: 10.1029/2017JG004379
Scopus记录号: 2-s2.0-85050749202
论文题名:
Lakes on the Tibetan Plateau as Conduits of Greenhouse Gases to the Atmosphere
作者: Yan F.; Sillanpää M.; Kang S.; Aho K.S.; Qu B.; Wei D.; Li X.; Li C.; Raymond P.A.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:7
起始页码: 2091
结束页码: 2103
语种: 英语
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 μatm, respectively. The average diffusive fluxes (and uncentainty intervals) of these three gases were 73.7 (0.9–295.3) mmol · m−2 · day−1, 5.2 (0.0008–45.9) mmol · m−2 · day−1, and 6.5 (0.07–20.9) μmol · 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. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113585
Appears in Collections:气候减缓与适应

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作者单位: Department of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Mikkeli, Finland; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; Chinese Academy of Sciences, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT, United States; Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China; Key Laboratory of Aerosol Chemistry & Physics (KLACP), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China

Recommended Citation:
Yan F.,Sillanpää M.,Kang S.,et al. Lakes on the Tibetan Plateau as Conduits of Greenhouse Gases to the Atmosphere[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(7)
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