DOI: 10.1002/jgrd.50491
论文题名: Evaluation of an ARPS-based canopy flow modeling system for use in future operational smoke prediction efforts
作者: Kiefer M.T. ; Zhong S. ; Heilman W.E. ; Charney J.J. ; Bian X.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6175
结束页码: 6188
语种: 英语
英文关键词: atmospheric model
; CHATS
; model evaluation
; smoke prediction
; vegetation canopy
Scopus关键词: Experiments
; Flow control
; Forestry
; Kinetics
; Smoke
; Tools
; Turbulent flow
; Vegetation
; Advanced regional prediction system models
; Atmospheric model
; CHATS
; Homogeneous atmospheres
; Horizontal grid spacing
; Model evaluation
; Turbulent kinetic energy
; Vegetation canopy
; Computer simulation
; canopy
; decadal variation
; drag
; flow modeling
; kinetic energy
; regional climate
; sensitivity analysis
; simulation
; smoke
; statistical analysis
; turbulent flow
英文摘要: Efforts to develop a canopy flow modeling system based on the Advanced Regional Prediction System (ARPS) model are discussed. The standard version of ARPS is modified to account for the effect of drag forces on mean and turbulent flow through a vegetation canopy, via production and sink terms in the momentum and subgrid-scale turbulent kinetic energy (TKE) equations. Additionally, a downward decaying net radiation profile inside the canopy is used to account for the attenuation of net radiation by vegetation elements. As a critical step in the model development process, simulations performed with the new canopy model, termed ARPS-CANOPY, are examined and compared to observations from the Canopy Horizontal Array Turbulence Study (CHATS) experiment. Comparisons of mean and turbulent flow properties in a statistically homogeneous atmosphere are presented for two cases, one when the trees are dormant without leaves and another when the trees are full of mature leaves. The model is shown to reproduce the shape of the vertical profiles of mean wind, temperature, and TKE observed during the CHATS experiment, with errors generally smaller in the afternoon and in the case with stronger mean flow. Sensitivity experiments with relatively coarse (90 m) horizontal grid spacing retain the overall mean profile shapes and diurnal trends seen in the finer-resolution simulations. The work described herein is part of a larger effort to develop predictive tools for close-range (on the order of 1 km from the source) smoke dispersion from low-intensity fires within forested areas. Key Points Model reproduces shapes and trends of observed vertical mean profiles Overall profile shapes and trends not sensitive to horizontal grid spacing Effort to develop predictive tools for close-range smoke dispersion may proceed ©2013. The Authors. Journal of Geophysical Research: Atmospheres published by Wiley on behalf of the American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63631
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Geography, Michigan State University, 1407 S. Harrison Rd., East Lansing, MI 48823, United States; Northern Research Station, USDA Forest Service, East Lansing, MI, United States
Recommended Citation:
Kiefer M.T.,Zhong S.,Heilman W.E.,et al. Evaluation of an ARPS-based canopy flow modeling system for use in future operational smoke prediction efforts[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)