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DOI | 10.1002/2017JD027904 |
A Numerical Study of Atmospheric Perturbations Induced by Heat From a Wildland Fire: Sensitivity to Vertical Canopy Structure and Heat Source Strength | |
Kiefer, Michael T.1; Zhong, Shiyuan1; Heilman, Warren E.2; Charney, Joseph J.2; Bian, Xindi2 | |
2018-03-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:5页码:2555-2572 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | An improved understanding of atmospheric perturbations within and above a forest during a wildland fire has relevance to many aspects of wildland fires including fire spread, smoke transport and dispersion, and tree mortality. In this study, the ARPS-CANOPY model, a version of the Advanced Regional Prediction System (ARPS) model with a canopy parameterization, is utilized in a series of idealized numerical experiments to investigate the influence of vertical canopy structure on the atmospheric response to a stationary sensible heat flux at the ground (fire heat flux), broadly consistent in magnitude with the sensible heat flux from a low-intensity surface fire. Five vertical canopy structures are combined with five fire heat flux magnitudes to yield a matrix of 25 simulations. Analyses of the fire-heat-flux-perturbed u component of the wind, vertical velocity, kinetic energy, and temperature show that the spatial pattern and magnitude of the perturbations are sensitive to vertical canopy structure. Both vertical velocity and kinetic energy exhibit an increasing trend with increasing fire heat flux that is stronger for cases with some amount of overstory vegetation than cases with exclusively understory vegetation. A weaker trend in cases with exclusively understory vegetation indicates a damping of the atmospheric response to the sensible heat from a surface fire when vegetation is most concentrated near the surface. More generally, the results presented in this study suggest that canopy morphology should be considered when applying the results of a fire-atmosphere interaction study conducted in one type of forest to other forests with different canopy structures. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428437100011 |
WOS关键词 | PREDICTION SYSTEM ARPS ; LARGE-EDDY-SIMULATION ; SOLAR-RADIATION ; PLANT CANOPIES ; FOLIAR DENSITY ; GRASS FIRES ; WIND-FLOWS ; MODEL ; TURBULENCE ; DYNAMICS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33302 |
专题 | 气候变化 |
作者单位 | 1.Michigan State Univ, Dept Geog Environm & Spatial Sci, E Lansing, MI 48824 USA; 2.US Forest Serv, Northern Res Stn, Lansing, MI USA |
推荐引用方式 GB/T 7714 | Kiefer, Michael T.,Zhong, Shiyuan,Heilman, Warren E.,et al. A Numerical Study of Atmospheric Perturbations Induced by Heat From a Wildland Fire: Sensitivity to Vertical Canopy Structure and Heat Source Strength[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(5):2555-2572. |
APA | Kiefer, Michael T.,Zhong, Shiyuan,Heilman, Warren E.,Charney, Joseph J.,&Bian, Xindi.(2018).A Numerical Study of Atmospheric Perturbations Induced by Heat From a Wildland Fire: Sensitivity to Vertical Canopy Structure and Heat Source Strength.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(5),2555-2572. |
MLA | Kiefer, Michael T.,et al."A Numerical Study of Atmospheric Perturbations Induced by Heat From a Wildland Fire: Sensitivity to Vertical Canopy Structure and Heat Source Strength".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.5(2018):2555-2572. |
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