DOI: 10.1016/j.atmosenv.2014.05.072
Scopus记录号: 2-s2.0-84902103897
论文题名: Particle deposition to forests: An alternative to K-theory
作者: Huang C ; -W ; , Launiainen S ; , Grönholm T ; , Katul G ; G
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 94 起始页码: 593
结束页码: 605
语种: 英语
英文关键词: Atmospheric aerosol particles
; Canopy turbulence
; Particle flux budget
; Second-order closure model
; Size-resolved model
Scopus关键词: Algorithms
; Atmospheric aerosols
; Budget control
; Buoyancy
; Deposition
; Friction
; Particle size
; Velocity
; Atmospheric aerosol particles
; Canopy turbulence
; Different particle sizes
; Particle concentration measurement
; Particle fluxes
; Second-order closure model
; Size-resolved particles
; Turbulent diffusivities
; Forestry
; krypton 85
; phthalic acid dimethyl ester
; atmospheric deposition
; atmospheric modeling
; coniferous forest
; foliage
; forest canopy
; forest floor
; friction
; numerical model
; particle size
; particulate flux
; turbulent flow
; aerosol
; air pollution
; article
; atmospheric deposition
; boundary layer
; canopy
; dry deposition
; foliage
; forest
; leaf area
; leaf surface
; particle size
; priority journal
; relaxation time
; scots pine
; vegetation
; Aerosols
; Atmosphere
; Buoyancy
; Cost Control
; Deposition
; Forest Canopy
; Friction
; Particle Size
; Turbulence
; Finland
; Hyytiala
; Pirkanmaa
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: It has been known for some time that flux-gradient closure schemes (or K-theory), widely used to model the aerosol sized particle turbulent diffusivity, are problematic within canopies. Reported momentum transport in a zero- or counter-mean velocity gradient flow within open trunk spaces of forests is prototypical of the failure of K-theory. To circumvent this problem, a multi-layered and size-resolved second-order closure model is developed using the mean particle turbulent flux budget as a primary closure for the particle turbulent flux instead of K-theory. The proposed model is evaluated against the multi-level size-resolved particle fluxes and particle concentration measurements conducted within and above a tall Scots pine forest situated in Hyytiälä, Southern Finland. Conditions promoting the failure of K-theory for different particle sizes and canopy layers and the characteristics of the particle transport processes within the canopy sub-layer (CSL) are discussed. Using the model, it is shown that K-theory may still be plausible for modeling the particle deposition velocity when the particle size range is smaller than 1μm provided the local particle turbulent diffusivity is estimated from the characteristic turbulent relaxation time scale and the vertical velocity variance. Model calculations suggest that the partitioning of particle deposition onto foliage and forest floor appears insensitive to the friction velocity for particles smaller than 100nm (ultrafine), but decreases with increasing friction velocity for particles larger than 100nm (accumulation and coarse modes). © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81128
Appears in Collections: 气候变化事实与影响
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作者单位: Nicholas School of the Environment, Duke University, Durham, NC 27705, United States; Finnish Forest Research Institute, Joensuu Research Unit, Yliopistonkatu 6, FI-80101 Joensuu, Finland; Department of Physics, University of Helsinki, P.O. Box 48, FI-00014, Finland
Recommended Citation:
Huang C,-W,, Launiainen S,et al. Particle deposition to forests: An alternative to K-theory[J]. Atmospheric Environment,2014-01-01,94