DOI: 10.1016/j.atmosenv.2015.10.007
Scopus记录号: 2-s2.0-84944452283
论文题名: Dynamics and controls of CO2 and CH4 emissions in the wetland of a montane permafrost region, northeast China
作者: Liu X ; , Guo Y ; , Hu H ; , Sun C ; , Zhao X ; , Wei C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 454
结束页码: 462
语种: 英语
英文关键词: CO2 and CH4 emissions
; Permafrost marshes
; Soil temperature
; Water table level
Scopus关键词: Carbon dioxide
; Climate change
; Gas emissions
; Greenhouse gases
; Groundwater
; Organic carbon
; Permafrost
; Soils
; Temperature
; Water absorption
; Wetlands
; Dynamics and control
; Exponential regression
; Northern regions
; Permafrost region
; Primary production
; Soil organic carbon
; Soil temperature
; Water table level
; Soil pollution
; carbon dioxide
; methane
; water
; carbon dioxide
; carbon emission
; emission control
; global warming
; greenhouse gas
; methane
; montane forest
; permafrost
; primary production
; soil organic matter
; soil temperature
; water table
; wetland
; absorption
; air pollution control
; Article
; carbon footprint
; China
; climate change
; controlled study
; marsh
; permafrost
; priority journal
; seasonal variation
; soil temperature
; thawing
; warming
; water table
; China
; Da Hinggan Mountains
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: To quantify the fluxes and examine the controls on greenhouse gas emissions from the permafrost marshes where the fate of the large quantity of soil organic carbon remains poorly understood, we measured carbon dioxide (CO2) and methane (CH4) emissions in the northern region of the Great Xing'an Mountains, northeast China, in the thawing seasons of 2011 and 2012. The mean CO2 and CH4 fluxes from the marshes were estimated at 403.47 and 0.14 mg m-2 h-1 on average during the two years. Soil temperature was determined as the primary control on the seasonal greenhouse gas emissions during the growing period. The Q10 values, calculated from the exponential regression between soil temperature and CO2 emissions, suggest that the sensitivity of CO2 flux to climate warming has a high spatially variability in the study area. Absorption of atmospheric CH4 was seasonally detected at the sites with lower water table, which confirms the potential of the natural marshes as CH4 sink when water table goes down due to climate change. When viewed from the ecosystem scale, the mean annual water table level and aboveground primary production were deemed as the dominant influencing factors for the mean annual fluxes, which suggests that there were different controls on the gas emissions at different spatial scales. Therefore, the primary controls of the CO2 and CH4 emissions at different spatial scales need to be surveyed in more detail when focusing on the future alteration of greenhouse gas emissions from permafrost marshes due to climate warming. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81329
Appears in Collections: 气候变化事实与影响
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作者单位: Forest Ecosystem Station of the HeiLongJiang NenJiangYuan, Forestry and Agriculture of Research Institute in the Great Xing'an Mountains, China; Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China; College of Forestry, Northeast Forestry University, Harbin, China; Bureau of Forestry in the Great Xing'an Mountains, Jagedaqi, China
Recommended Citation:
Liu X,, Guo Y,, Hu H,et al. Dynamics and controls of CO2 and CH4 emissions in the wetland of a montane permafrost region, northeast China[J]. Atmospheric Environment,2015-01-01,122