DOI: 10.5194/hess-21-2987-2017
Scopus记录号: 2-s2.0-85021170045
论文题名: Explaining the convector effect in canopy turbulence by means of large-eddy simulation
作者: Banerjee T ; , De Roo F ; , Mauder M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 6 起始页码: 2987
结束页码: 3000
语种: 英语
Scopus关键词: Aerodynamics
; Heat flux
; Heat resistance
; Large eddy simulation
; Aerodynamic resistance
; Aerodynamic roughness
; Air temperature
; Canopy turbulence
; General description
; Generic features
; Semi arid
; Sensible heat flux
; Turbulence
; aerodynamics
; evapotranspiration
; heat flux
; heat transfer
; large eddy simulation
; parameterization
; roughness
; semiarid region
; turbulence
英文摘要: Semi-arid forests are found to sustain a massive sensible heat flux in spite of having a low surface to air temperature difference by lowering the aerodynamic resistance to heat transfer (rH) - a property called the "canopy convector effect" (CCE). In this work large-eddy simulations are used to demonstrate that the CCE appears more generally in canopy turbulence. It is indeed a generic feature of canopy turbulence: rH of a canopy is found to reduce with increasing unstable stratification, which effectively increases the aerodynamic roughness for the same physical roughness of the canopy. This relation offers a sufficient condition to construct a general description of the CCE. In addition, we review existing parameterizations for rH from the evapotranspiration literature and test to what extent they are able to capture the CCE, thereby exploring the possibility of an improved parameterization. Copyright © 2017 by ASME. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79147
Appears in Collections: 气候变化事实与影响
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作者单位: Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMKIFU), Garmisch-Partenkirchen, Germany; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, United States
Recommended Citation:
Banerjee T,, De Roo F,, Mauder M. Explaining the convector effect in canopy turbulence by means of large-eddy simulation[J]. Hydrology and Earth System Sciences,2017-01-01,21(6)