Measurements relating fire radiative energy density and surface fuel consumption – RxCADRE 2011 and 2012
Measurements relating fire radiative energy density and surface fuel consumption – RxCADRE 2011 and 2012
复制标题
与火灾辐射能量密度和表面燃料消耗相关的测量 – RxCADRE 2011 和 2012
DOI：
10.1071/wf14159
复制
发表时间：
2016
影响因子：
3.1
通讯作者：
R. Ottmar
中科院分区：
文献类型：
--
作者：
A. Hudak;Matthew B. Dickinson;B. Bright;R. Kremens;E. L. Loudermilk;Joseph J. O’Brien;Benjamin S. Hornsby;R. Ottmar
小规模实验表明，火灾辐射能与燃烧的燃料呈线性关系，但这种关系尚未在规定火灾的景观水平上显示出来。本文介绍了RxCADRE 2011年和2012年森林和非森林燃烧区块的火灾前燃料负荷、消耗、火灾辐射能量密度（FRED）和火灾辐射功率通量密度（FRFD）的现场和遥感测量，其中FRED是综合的。将机载长波红外（LWIR）图像时间序列校准为FRFD并进行集成以提供FRED。根据机载激光雷达衍生的指标，预测了夹样图中测量的地表燃料负荷。对地表燃料和FRED地图进行了校正，以消除森林块中上层树冠遮挡辐射信号的影响，并对FRED地图进行了进一步校正，以消除FRFD的时空欠采样。基于机载LWIR图像和各种地面验证传感器的FRED预测的燃油消耗与观测到的燃油消耗接近线性关系，这符合我们的预期。这些现场、机载激光雷达和LWIR图像数据集，在校准和校正应用之前和之后，将从永久档案中公开，供进一步分析和促进火灾建模。
Small-scale experiments have demonstrated that fire radiative energy is linearly related to fuel combusted but such a relationship has not been shown at the landscape level of prescribed fires. This paper presents field and remotely sensed measures of pre-fire fuel loads, consumption, fire radiative energy density (FRED) and fire radiative power flux density (FRFD), from which FRED is integrated, across forested and non-forested RxCADRE 2011 and 2012 burn blocks. Airborne longwave infrared (LWIR) image time series were calibrated to FRFD and integrated to provide FRED. Surface fuel loads measured in clip sample plots were predicted across burn blocks from airborne lidar-derived metrics. Maps of surface fuels and FRED were corrected for occlusion of the radiometric signal by the overstorey canopy in the forested blocks, and FRED maps were further corrected for temporal and spatial undersampling of FRFD. Fuel consumption predicted from FRED derived from both airborne LWIR imagery and various ground validation sensors approached a linear relationship with observed fuel consumption, which matched our expectation. These field, airborne lidar and LWIR image datasets, both before and after calibrations and corrections have been applied, will be made publicly available from a permanent archive for further analysis and to facilitate fire modelling.
影响因子：
13.5
作者：
Freeborn, Patrick H.;Wooster, Martin J.;Roberts, Gareth
通讯作者：
Roberts, Gareth