LCM2: A coupled leaf/canopy radiative transfer model

Two radiative transfer models have been coupled to generate vegetation cano py reflectance as a function of leaf chemistry, leaf morphology (as represe nted by leaf scattering properties), leaf thickness, soil reflectance, and canopy architecture. A model of radiative transfer within a leaf, called LE AFMOD, treats the radiative transfer equation for a slab of optically unifo rm leaf material, providing an estimate of leaf hemispherical reflectance a nd transmittance as well as the radiance exiting the leaf surfaces. The can opy model then simulates radiative transfer within a mixture of leaves, wit h each having uniform optical properties as determined by LEAFMOD, assuming a bi-Lambertian leaf scattering phase function. The utility of the model, called LCM2 (Leaf/Canopy Model version 2), is demonstrated through predicti ons of radiometric measurements of canopy reflectance and sensitivity to le af chlorophyll and moisture content. (C)Elsevier Science Inc., 1999.