The sensitivity of SAR backscatter to forest windthrow gaps
The sensitivity of SAR backscatter to forest windthrow gaps
复制标题
SAR后向散射对森林风距的敏感性
DOI：
10.1080/014311698214811
复制
发表时间：
1998
影响因子：
3.4
通讯作者：
R. M. Green
中科院分区：
文献类型：
--
作者：
R. M. Green
了解森林冠层间隙的频率、大小和分布对于了解森林生态系统状态和动态非常重要。由于微波反向散射对植被结构特性敏感，SAR 数据提供了获取冠层间隙信息的潜力。这封信研究了针叶林中多波段/偏振反向散射与风距间隙之间的关系。在使用的每个波段/偏振配置中，尤其是 C 波段 HH 中，由于风射间隙的存在而导致的反向散射变化很明显。表明反向散射不仅对风隙的存在敏感，而且对风隙的形状和几何形状敏感，在本研究中，风隙的特征是间隙面积、周长和周长/面积。
Knowledge of the frequency, size and distribution of forest canopy gaps is important in understanding forest ecosystem state and dynamics. SAR data offers the potential to acquire information on canopy gaps since microwave backscatter is sensitive to vegetation structural properties. This letter examines relations between multi-waveband/polarisation backscatter and windthrow gaps in a coniferous plantation. Changes in backscatter due to the presence of windthrow gaps were evident in each waveband/polarisation configuration used, especially C -band HH . It is suggested that backscatter is sensitive not only to the presence but also the shape and geometry of the windthrow gaps, characterised in this study by gap area, perimeter and perimeter/area.