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The vegetation indices currently derived from satellite observations can, in principle, be related to some of the biophysical properties of the canopy through a complex set of equations, provided that atmospheric effects, the anisotropy of the coupled surface-atmosphere system, and the morphology and optical heterogeneity of the canopy are taken into account. These indices strongly depend on the aerosol and water vapour content, a fact that limits their quantitative interpretation in terms of physical and biophysical properties of the canopy. The interaction between the electromagnetic solar radiation and the surface is discussed using physical models of albedos developed for vegetation canopies. Finally, the biophysical leaf model PROSPECT is used to parametrise relationships between leaf reflectance and some physiological properties of the canopy elements.

Additional information

Authors: PINTY B, Université Blaise Pascal, Laboratoire de Météorologie Physique, Aubière (FR);LEPRIEUR C, Laboratoire d'Etudes et de Recherches en Télédétection Spatiale, Toulouse (FR);VERSTRAETE M M, JRC Ispra (IT)
Bibliographic Reference: Article: Remote Sensing Reviews, Vol. 7 (1993) pp. 127-150
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