Spectral Signature of Forest Damage.

The change of spectral signature by forest damage is analysed for spruce and beech. Reflectance spectra of branches and components like individual needles, leaves etc from trees of different degrees of damage were measured in the 400 to 780 nm region at different fields of view. A linear superposition model is used to simulate averaged branch spectra from the spectral signature of components. The histological background of the change of spectral signature is discussed