DOI: 10.1016/j.atmosenv.2014.03.067
Scopus记录号: 2-s2.0-84897940232
论文题名: Vertical distribution of CO2 in the atmospheric boundary layer: Characteristics and impact of meteorological variables
作者: Li Y ; , Deng J ; , Mu C ; , Xing Z ; , Du K
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 91 起始页码: 110
结束页码: 117
语种: 英语
英文关键词: Boundary layer
; Meteorological variables
; Tethered balloon
; Vertical distribution
Scopus关键词: Atmospheric boundary layer
; Atmospheric composition
; Atmospheric structure
; Boundary layer flow
; Boundary layers
; Models
; Urban planning
; Atmospheric boundary layer depths
; Concentration profiles
; Convective boundary layers
; Meteorological condition
; Meteorological variables
; Spatial and temporal variation
; Tethered balloon
; Vertical distributions
; Carbon dioxide
; carbon dioxide
; atmospheric chemistry
; balloon observation
; boundary layer
; carbon dioxide
; satellite data
; suburban area
; vertical distribution
; vertical profile
; altitude
; article
; atmosphere
; boundary layer
; carbon dioxide transport
; circadian rhythm
; concentration (parameters)
; environmental impact
; meteorology
; priority journal
; surface property
; China
; Fujian
; Xiamen
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: Knowledge of vertical CO2 distribution is important for development of CO2 transport models and calibration/validation of satellite-borne measurements. In this study, vertical profiles of CO2 concentration within 0-1000m were measured using a tethered balloon at a suburban site in Xiamen, which is undergoing fast urbanization. The characteristics of CO2 vertical distribution were investigated under both stable and convective boundary-layer conditions. The correlation of ground level CO2 concentrations and those at high altitudes decreased with altitude and show significant correlation in the first 300m with R=0.78 at 100m, R=0.52 at 200m, R=0.40 at 300m (P<0.01). The correlation keeps almost constant for 300-800m, and there is no obvious correlation at 800m, indicating that the impact of ground level CO2 was restricted within the 300m above the ground. When comparing the vertical profiles obtained at different times during a 24h period, it was found that CO2 concentration exhibited more obvious diurnal pattern at surface level than at high altitude because of the variation of sources and sinks of CO2 at ground level. Most profiles demonstrated declining trends of CO2 concentration with increasing altitude. The vertical profiles of CO2 were fitted to obtain an empirical equation for estimating CO2 vertical concentration in the lower atmosphere (0-1000m): y=-75.04+1.17×109e-x/28.01, R2=0.59 (P<0.05). However, for some cases opposite patterns were observed that the CO2 concentration profiles showed a turning point at a certain altitude or little variation with altitude under certain meteorological conditions. The atmospheric boundary layer depth and atmospheric stability are two major factors controlling the vertical structure of CO2 profile. The results would improve our understanding of the spatial and temporal variation of CO2 in urban environment, which would facilitate using 3-D transport model to study the impacts of CO2 on urban environment. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80952
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Canada
Recommended Citation:
Li Y,, Deng J,, Mu C,et al. Vertical distribution of CO2 in the atmospheric boundary layer: Characteristics and impact of meteorological variables[J]. Atmospheric Environment,2014-01-01,91