DOI: 10.1016/j.atmosenv.2017.12.016
Scopus记录号: 2-s2.0-85040007171
论文题名: Methanol exchange dynamics between a temperate cropland soil and the atmosphere
作者: Bachy A ; , Aubinet M ; , Amelynck C ; , Schoon N ; , Bodson B ; , Moureaux C ; , Delaplace P ; , De Ligne A ; , Heinesch B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 176 起始页码: 229
结束页码: 239
语种: 英语
英文关键词: Adsorption
; Biogenic volatile organic compounds
; Cropland
; Desorption
; Methanol
; Soil
Scopus关键词: Adsorption
; Atmospheric composition
; Desorption
; Dynamics
; Ecology
; Ecosystems
; Finance
; Methanol
; Proton transfer
; Soils
; Volatile organic compounds
; Ambient concentrations
; Biogenic volatile organic compounds
; Cropland
; Orders of magnitude
; Physical adsorption
; Proton transfer reaction mass spectrometers
; Scanning techniques
; Soil surface temperatures
; Soil pollution
; methanol
; adsorption
; agricultural land
; agricultural soil
; atmosphere-biosphere interaction
; biogenic emission
; desorption
; eddy covariance
; environmental conditions
; flux measurement
; methanol
; mixing ratio
; soil
; soil emission
; soil temperature
; temperate environment
; volatile organic compound
; adsorption
; air temperature
; Article
; atmosphere
; biomass
; controlled study
; cropland
; degradation
; desorption
; dynamics
; forest
; germination
; leaf area
; litter decomposition
; maize
; mass spectrometry
; methylotroph
; priority journal
; proton transport
; soil
; soil moisture
; soil quality
; surface property
; vegetation
; winter wheat
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: Soil methanol (CH3OH) exchange is often considered as several orders of magnitude smaller than plant methanol exchange. However, for some ecosystems, it is significant in regard with plant exchange and worth thus better consideration. Our study sought to gain a better understanding of soil exchange. Methanol flux was measured at the ecosystem scale on a bare agricultural soil over two contrasted periods using the disjunct eddy covariance by mass scanning technique. A proton-transfer-reaction mass spectrometer was used for the methanol ambient mixing ratio measurements. Bi-directional exchange dynamics were observed. Methanol emission occurred under dry and warm conditions and correlated best with soil surface temperature, whereas methanol uptake occurred under wet and mild conditions and correlated well with the methanol ambient concentration. After having tested a physical adsorption-desorption model and by confronting our data with the literature, we propose that the exchange was ruled by both a physical adsorption/desorption mechanism and by a methanol source, which still needs to be identified. The soil emission decreased when the vegetation developed. The reasons for the decrease still need to be determined. Overall, the dynamics observed at our site were similar to those reported by other studies for both cropland and forest ecosystems. The mechanism proposed in our work can thus be possibly applied to other sites or ecosystems. In addition, the methanol exchange rate was in the upper range of the exchange rates reported by other soil studies, suggesting that cropland soils are more important methanol exchangers than those in other ecosystems and should therefore be further investigated. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83025
Appears in Collections: 气候变化事实与影响
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作者单位: TERRA Teaching and Research Centre, Gembloux Agro-Bio Tech, University of Liège, Avenue de la Faculté 8, Gembloux, Belgium; Royal Belgian Institute for Space Aeronomy, Ringlaan 3, Brussels, Belgium; Dept. of Analytical Chemistry, Ghent University, Krijgslaan 281-S12, Ghent, Belgium; AgroBioChem, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés 2, Gembloux, Belgium
Recommended Citation:
Bachy A,, Aubinet M,, Amelynck C,et al. Methanol exchange dynamics between a temperate cropland soil and the atmosphere[J]. Atmospheric Environment,2018-01-01,176