DEPENDENCE OF RADAR BACKSCATTER ON CONIFEROUS FOREST BIOMASS
DEPENDENCE OF RADAR BACKSCATTER ON CONIFEROUS FOREST BIOMASS
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DOI：
10.1109/36.134090
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发表时间：
1992-03-01
影响因子：
8.2
通讯作者：
CHRISTENSEN, N
中科院分区：
文献类型：
--
作者：
DOBSON, MC;ULABY, FT;CHRISTENSEN, N
两项独立的实验工作利用 P、L 和 C 波段的偏振机载 SAR 数据研究了雷达反向散射对单一物种针叶林地上生物量的依赖性。 法国朗德附近的海松人工林树龄为 8 至 46 年，地上生物量为 5 至 105 吨/公顷。 火炬松林建立在北卡罗来纳州杜克市附近的废弃农田上，树龄从 4 年到 90 年不等，并将较老林地的地上生物量范围扩大到 560 吨/公顷。 这两个实验林在生物量方面基本上是互补的。 发现雷达反向散射随着生物量的增加而近似线性增加，直到其在取决于雷达频率的生物量水平处饱和。 P 波段生物量饱和度约为 200 吨/公顷，L 波段约为 100 吨/公顷，C 波段后向散射系数对地上总生物量的敏感性要低得多。
Two independent experimental efforts have examined the dependence of radar backscatter on aboveground biomass of mono specie conifer forests using polarimetric airborne SAR data at P-, L- and C-bands. Plantations of maritime pines near Landes, France range in age from 8 to 46 years with aboveground biomass between 5 and 105 tons/ha. Loblolly pine stands established on abandoned agricultural fields near Duke, NC range in age from 4 to 90 years and extend the range of aboveground biomass to 560 tons/ha for the older stands. These two experimental forests are largely complementary with respect to biomass. Radar backscatter is found to increase approximately linearly with increasing biomass until it saturates at a biomass level that depends on the radar frequency. The biomass saturation level is about 200 tons/ha at P-band and 100 tons/ha at L-band, and the C-band backscattering coefficient shows much less sensitivity to total aboveground biomass.