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Open AccessArticle

Application of a Three-Dimensional Radiative Transfer Model to Retrieve the Species Composition of a Mixed Forest Stand from Canopy Reflected Radiation

1
Department of Mathematics, Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
2
Department of Meteorology and Climatology, Faculty of Geography, Lomonosov Moscow State University, Moscow 119991, Russia
3
Laboratory of Biogeocenology, A.N.Severtsov Institute of Ecology and Evolution, Russian Academy of Science, Moscow 119071, Russia
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(10), 1661; https://doi.org/10.3390/rs10101661
Received: 31 July 2018 / Revised: 12 October 2018 / Accepted: 16 October 2018 / Published: 20 October 2018
(This article belongs to the Special Issue Radiative Transfer Modelling and Applications in Remote Sensing)
The paper introduces a three-dimensional model to derive the spatial patterns of photosynthetically active radiation (PAR) reflected and absorbed by a non-uniform forest canopy with a multi-species structure, as well as a model algorithm application to retrieve forest canopy composition from reflected PAR measured along some trajectory above the forest stand. This radiative transfer model is based on steady-state transport equations, initially suggested by Ross, and considers the radiative transfer as a function of the structure of individual trees and forest canopy, optical properties of photosynthesizing and non-photosynthesizing parts of the different tree species, soil reflection, and the ratio of incoming direct and diffuse solar radiation. Numerical experiments showed that reflected solar radiation of a typical mixed forest stand consisting of coniferous and deciduous tree species was strongly governed by canopy structure, soil properties and sun elevation. The suggested algorithm based on the developed model allows for retrieving the proportion of different tree species in a mixed forest stand from measured canopy reflection coefficients. The method accuracy strictly depends on the number of points for canopy reflection measurements. View Full-Text
Keywords: radiative transfer; three-dimensional model; canopy reflection; mixed forest; inverse problem radiative transfer; three-dimensional model; canopy reflection; mixed forest; inverse problem
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MDPI and ACS Style

Levashova, N.; Lukyanenko, D.; Mukhartova, Y.; Olchev, A. Application of a Three-Dimensional Radiative Transfer Model to Retrieve the Species Composition of a Mixed Forest Stand from Canopy Reflected Radiation. Remote Sens. 2018, 10, 1661.

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