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The effect of soil anisotropy on the radiance field emerging from vegetation canopies
Author(s) -
Pinty Bernard,
Verstraete Michel M.,
Gobron Nadine
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl00383
Subject(s) - vegetation (pathology) , environmental science , radiance , remote sensing , radiative transfer , soil science , field (mathematics) , anisotropy , brightness , canopy , atmospheric sciences , hydrology (agriculture) , geology , ecology , optics , physics , geotechnical engineering , medicine , mathematics , pathology , pure mathematics , biology
The solution of the radiation transfer equation in a vegetation canopy requires the specification of appropriate boundary conditions, especially at the interface between the vegetation layer and the soil. This short paper documents the effect of soil brightness and anisotropy on the field of radiances emerging at the top of the vegetation canopy in the solar domain. The study is based on the analysis of the sensitivity of an advanced radiation transfer model. It is shown that the scattering properties of the soil must be carefully assigned to ensure a correct interpretation of data collected over optically thin vegetation canopies.