DOI: 10.1002/jgrd.50436
论文题名: The importance of low-level environmental vertical wind shear to wildfire propagation: Proof of concept
作者: Kochanski A. ; Jenkins M.A. ; Sun R. ; Krueger S. ; Abedi S. ; Charney J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8238
结束页码: 8252
语种: 英语
英文关键词: atmosphere-fire interaction
; fire dynamics
; fire plume
; fire probability
; fire spread
; wind shear
Scopus关键词: Forecasting
; Shear flow
; Surface topography
; Thermal plumes
; Wind effects
; atmosphere-fire interaction
; Fire dynamics
; Fire plume
; Fire spread
; Wind shears
; Fires
; atmospheric modeling
; atmospheric plume
; atmospheric pollution
; numerical model
; prediction
; sensitivity analysis
; topography
; wildfire
; wind field
英文摘要: This study is a proof of concept of the sensitivity of grassfire propagation to vertical shear in the near-surface environmental flow found through four comparative grassfire numerical simulations with a coupled wildfire-atmosphere model. A unidirectional constant wind field, under neutral atmospheric conditions, no surface friction, Coriolis force or topography, and homogeneous fuel, prescribes the model environment. By using the same surface (at 6.2 m above ground level) wind speed for all simulations, analyses of the results can suggest when the behavior and spread rate of the fire may depend more on the interaction of the fire plume with the shear in the above surface wind or more on the magnitude of the mean upstream surface wind speed at the surface. Three aspects of wildfire behavior are investigated: impact of unidirectional vertical shear on surface flow properties and fire line propagation; variability in fire spread and area burnt due to the evolution of the surface flow; and implications of low-level vertical wind shear on the prediction of wildfire, especially extreme or erratic, behavior. Key Points Above-surface wind affects wildfire propagation, behavior, prediction Vertical-wind-shear/fire-interaction can be cause of erratic wildfire behavior A probability forecast for fire behavior is necessary ©2013. American Geophysical Union. All Rights Reserved. 资助项目: CNS-0821794
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63470
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Meteorology, University of Utah, Salt Lake City UT, United States; Department of Earth and Space Science and Engineering, York University, Toronto ON M3J 1P3, Canada; Environmental Modeling Center, National Center for Environmental Prediction, Camp Springs MD, United States; North Central Research Station, United States Forest Service, East Lansing MI, United States
Recommended Citation:
Kochanski A.,Jenkins M.A.,Sun R.,et al. The importance of low-level environmental vertical wind shear to wildfire propagation: Proof of concept[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)