MODIS-derived visible atmospherically resistant index for monitoring chaparral moisture content
MODIS-derived visible atmospherically resistant index for monitoring chaparral moisture content
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DOI：
10.1080/01431160500185342
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发表时间：
2005-09-10
影响因子：
3.4
通讯作者：
Kaiser, J
中科院分区：
文献类型：
--
作者：
Stow, D;Niphadkar, M;Kaiser, J
由MODIS表面反射率数据导出的归一化差分指数（ndi）时间序列为监测燃料含水率（MC）以进行火灾风险评估提供了潜在的有用信息。利用可见光大气阻力指数（VARI）和归一化差水指数（NDWI）监测灌木林植被动态变化。考虑到地面FMC测量和modis衍生ndi的不同空间分辨率，回归系数令人鼓舞。与NDWI相比，VARI在FMC方面表现出更大的时间共变性（0.79 > r(2) < 0.94）和空间鲁棒性，尽管前者仅基于可见波段反射率数据。
Time series of normalized difference indices (NDIs) derived from MODIS surface reflectance data provide potentially useful information for monitoring fuel moisture content ( MC) for fire risk assessment. The visible atmospherically resistant index (VARI) and normalized difference water index (NDWI) were compared for monitoring live FMC of chaparral shrublands. Regression coefficients are encouraging given disparate spatial resolutions of ground-based FMC measurements and MODIS-derived NDIs. VARI exhibited greater temporal co-variability (0.79 > r(2) < 0.94) and spatial robustness with FMC than NDWI, even though the former is based solely on visible waveband reflectance data.