DOI: 10.1016/j.atmosenv.2016.11.068
Scopus记录号: 2-s2.0-85000948373
论文题名: Trend analysis of CO2 and CH4 recorded at a semi-natural site in the northern plateau of the Iberian Peninsula
作者: Pérez I ; A ; , Sánchez M ; L ; , García M ; Á ; , Pardo N
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 151 起始页码: 24
结束页码: 33
语种: 英语
英文关键词: Carbon dioxide
; Kernel smoothing
; Local regression
; Long-term analysis
; Methane
Scopus关键词: Boundary layers
; Carbon
; Harmonic analysis
; Long Term Evolution (LTE)
; Methane
; Polynomials
; Vegetation
; Iberian Peninsula
; Kernel smoothing
; Local regression
; Long term analysis
; Plant activities
; Second harmonics
; Stable boundary layer
; Vegetation growth
; Carbon dioxide
; carbon dioxide
; methane
; atmospheric chemistry
; boundary layer
; carbon dioxide
; concentration (composition)
; growing season
; long-term change
; methane
; regression analysis
; smoothing
; trend analysis
; vegetation dynamics
; Article
; autumn
; boundary layer
; calculation
; chemical analysis
; controlled study
; Eastern Europe
; kernel method
; priority journal
; seasonal variation
; summer
; trend study
; vegetation
; winter
; Iberian Peninsula
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: CO2 and CH4 were recorded from October 2010 to February 2016 with a Picarro G1301 analyser at the centre of the upper plateau of the Iberian Peninsula. Large CO2 values were observed during the vegetation growing season, and were reinforced by the stable boundary layer during the night. Annual CH4 evolution may be explained by ecosystem activity and by the dispersion linked with the evolution of the boundary layer. Their trends were studied using an equation that considers one polynomial and one harmonic part. The polynomial part revealed an increasing trend from 0.8 to 2.3 ppm year−1 for CO2 and from 0.004 to 0.011 ppm year−1 for CH4. The harmonic part considered four harmonics whose amplitudes were noticeable for the first and second harmonics for CO2 and for the first harmonic for CH4. Long-term evolution was similar with alternative equations. Finally, seasonal study indicated summer minima for both gases, which may be explained by the lack of vegetation in this season. Harmonic analysis showed two maxima for CO2, one in spring linked with vegetation growth, which decreased with time, and another in autumn related with the onset of plant activity after the summer, which increased with time. CH4 presented only one maximum in winter and a short time with steady concentration in spring where the evolution of the boundary layer may play a noticeable role. The harmonic equation, which takes into account all the observations, revealed opposite behaviour between CO2, whose minima decreased, and CH4, whose maxima increased. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82236
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Applied Physics, Faculty of Sciences, University of Valladolid, Paseo de Belén, 7, Valladolid, Spain
Recommended Citation:
Pérez I,A,, Sánchez M,et al. Trend analysis of CO2 and CH4 recorded at a semi-natural site in the northern plateau of the Iberian Peninsula[J]. Atmospheric Environment,2017-01-01,151