DOI: 10.1016/j.atmosenv.2015.05.026
Scopus记录号: 2-s2.0-84929583886
论文题名: Evolution and variation of atmospheric carbon dioxide concentration over terrestrial ecosystems as derived from eddy covariance measurements
作者: Liu M ; , Wu J ; , Zhu X ; , He H ; , Jia W ; , Xiang W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 114 起始页码: 75
结束页码: 82
语种: 英语
英文关键词: Carbon flux
; CO2 concentration
; Eddy covariance technique
; Terrestrial ecosystem
Scopus关键词: Atmospheric chemistry
; Carbon
; Carbon dioxide
; Climate change
; Ecology
; Forestry
; Greenhouse gases
; Atmospheric carbon dioxide concentration
; Atmospheric variability
; Carbon fluxes
; Correlation coefficient
; Eddy covariance measurements
; Eddy covariance technique
; Temporal and spatial variation
; Terrestrial ecosystems
; Ecosystems
; carbon dioxide
; anthropogenic effect
; atmospheric chemistry
; carbon dioxide
; carbon flux
; concentration (composition)
; eddy covariance
; seasonal variation
; terrestrial ecosystem
; Article
; atmosphere
; atmospheric carbon dioxide concentration over terrestrial ecosystem
; carbon footprint
; ecosystem
; Eddy covariance
; evolution
; Northern Hemisphere
; priority journal
; seasonal variation
; United States
; Carbon
; Coefficients
; Correlation
; Ecosystems
; Hawaii [(ISL) Hawaiian Islands]
; Hawaii [United States]
; Hawaiian Islands
; Mauna Loa
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: Carbon dioxide (CO2 ) is the most important anthropogenic greenhouse gas contributing to global climate change. Understanding the temporal and spatial variations of CO2 concentration over terrestrial ecosystems provides additional insight into global atmospheric variability of CO2 concentration. Using 355 site-years of CO2 concentration observations at 104 eddy-covariance flux tower sites in Northern Hemisphere, we presented a comprehensive analysis of evolution and variation of atmospheric CO2 concentration over terrestrial ecosystem (ACTE) for the period of 1997-2006. Our results showed that ACTE exhibited a strong seasonal variations, with an average seaonsal amplitude (peak-trough difference) of 14.8ppm, which was approximately threefold that global mean CO2 observed in Mauna Loa in the United States (MLO). The seasonal variation of CO2 were mostly dominant by terrestrial carbon fluxes, i.e., net ecosystem procution (NEP) and gross primary produciton (GPP), with correlation coefficient(r) were-0.55 and-0.60 for NEP and GPP, respectively. However, the influence of carbon fluxes on CO2 were not significant at interannual scale, which implyed that the inter-annual changing trends of atmospheric CO2 in Northern Hemisphere were likely to depend more on anthropogenic CO2 emissions sources than on ecosystem change. It was estimated, by fitting a harmonic model to monthly-mean ACTE, that both annual mean and seasonal amplitude of ACTE increased over the 10-year period at rates of 2.04 and 0.60ppmyr-1, respectively. The uptrend of annual ACTE could be attributed to the dramatic global increase of CO2 emissions during the study period, whereas the increasing amplitude could be related to the increases in Northern Hemisphere biospheric activity. This study also found that the annual CO2 concentration showed large variation among ecosystems, with the high value appeared in deciduous broadleaf forest, evergreen broadleaf forest and cropland. We attribute these discrepancies to both differential local anthropogenic impacts and carbon sequestration abilities across ecosystem types. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81657
Appears in Collections: 气候变化事实与影响
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作者单位: Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China; State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, United States; Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Liu M,, Wu J,, Zhu X,et al. Evolution and variation of atmospheric carbon dioxide concentration over terrestrial ecosystems as derived from eddy covariance measurements[J]. Atmospheric Environment,2015-01-01,114