DOI: 10.1002/jgrd.50308
论文题名: Kinematic structure of a wildland fire plume observed by Doppler lidar
作者: Charland A.M. ; Clements C.B.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 8 起始页码: 3200
结束页码: 3212
语种: 英语
英文关键词: lidar
; plume dynamics
; remote sensing
; wildland fire
Scopus关键词: Doppler effect
; Optical radar
; Remote sensing
; Thermal plumes
; Velocity
; Backscatter intensity
; Fire-atmosphere interaction
; Meteorological measurements
; Plume dynamics
; Range-height indicators
; Thermodynamic measurements
; Water vapor mixing ratio
; Wildland fire
; Fires
; atmospheric plume
; backscatter
; complex terrain
; Doppler lidar
; kinematics
; mixing ratio
; prescribed burning
; radiosonde
; remote sensing
; thermodynamics
; water vapor
; wildfire
; wind velocity
; California
; San Jose [California]
; United States
英文摘要: Wildland fires present a challenging environment to make meteorological measurements. Observations in the vicinity of wildland fires are needed to better understand fire-atmosphere interactions and to provide data for the evaluation of coupled fire-atmosphere models. An observational study was conducted during a low-intensity prescribed fire in an area of complex terrain with grass fuels east of San José, California. A ground-based scanning Doppler lidar acquired radial wind velocities and backscatter intensity in and around the fire plume from multiple horizontal and vertical scans. The development of a convergence zone was consistently observed to exist downwind of the plume and was indicated by a decrease in radial velocity of 3-5 m s -1. Divergence calculations made from the lidar radial velocities showed that the magnitude of convergence ranged between -0.06 and -0.08 s -1 downwind of the plumes, while a maximum of -0.14 s-1 occurred within the plume near the fire front. Increased radial velocities were observed at the plume boundary, indicating fire-induced acceleration of the wind into the base of the convection column above the fire front. Thermodynamic measurements made with radiosondes showed the smoke plume had a potential temperature perturbation of 3.0 to 4.4 K and an increase in water vapor mixing ratio of 0.5 to 1.0 g kg-1. Plume heights determined from sequential range height indicator scans provided estimates of vertical velocity between 0.4 and 0.6 m s-1, representing the ambient background vertical velocity as the top of the plume likely reached equilibrium. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63818
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 Meteorology and Climate Science, San José State University California, San José, CA 95192, United States; Dept. of Atmospheric Sciences, University of Utah, Salt Lake City UT 84112, United States
Recommended Citation:
Charland A.M.,Clements C.B.. Kinematic structure of a wildland fire plume observed by Doppler lidar[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(8)