The spectral behaviour of Sphagnum canopies under varying hydrological conditions
The spectral behaviour of Sphagnum canopies under varying hydrological conditions
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不同水文条件下泥炭藓冠层的光谱行为
DOI：
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发表时间：
2003
影响因子：
5.2
通讯作者：
A. Baird
中科院分区：
文献类型：
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作者：
Dr Robert Bryant;A. Baird
我们测试了泥炭藓的光谱响应(0.42.5μm)在多大程度上可以用来指示北部湿地近地表水文条件的变化。通过对三种典型泥炭藻种的室内实验，我们发现：(1)三种泥炭草种的红外/近红外反射率(ETm+CH5/CH4)与以1.205μm为中心的吸水特征的相对深度(RDI值)和近地表体积含水率之间存在明显的联系；(2)这一比率的变化对于每种植物似乎是不同的；(3)与泥炭草属植物红边拐点有关的数据也可能提供关于光合作用活性与近地表体积含水率变化的重要信息。
We tested the extent to which the spectral response (0.4–2.5 μm) of Sphagnum can be used to indicate changes in near‐surface hydrological conditions in northern wetlands. Via laboratory experimentation on three typical Sphagnum species we found that: (1) there is a clear link between (a) a ratio of SWIR/NIR reflectance (ETM+ Ch 5/Ch4) and (b) the relative depth of the water absorbion feature centred at 1.205 μm (RDI), and near‐surface volumetric moisture content (VMC) of the three species, (2) the changes in this ratio seem to be distinct for each species, and (3) data relating to the red‐edge inflection point (REIP) for the Sphagnum species may also yield important information on variations in photosynthetic activity with near‐surface VMC.