10 September 2008 Estimation of land photosynthetically active radiation in clear sky using MODIS atmosphere and land products
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Abstract
Photosynthetically active radiation (PAR) is an essential parameter in vegetation growth model and soil carbon sequestration models. A method is presented with which instantaneous PAR can be calculated with high accuracy from Moderate Resolution Imaging Spectroradiometer (MODIS) atmosphere and land products. The method is based on a simplification of the general radiative transfer equation, which considers five major processes of attenuation of solar radiation: Rayleigh scattering, absorption by ozone and water vapor, aerosol scattering, multiply reflectance between surface and atmosphere. Comparing 108 retrieveled results to filed measured PAR in Yucheng station of Chinese Ecosystem Research Network (CERN) in 2006, and the r-square of 0.855 indicates that the computed results can interpret actual PAR well.
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Xiaoping Xie, Xiaoping Xie, Wei Gao, Wei Gao, Zhiqiang Gao, Zhiqiang Gao, } "Estimation of land photosynthetically active radiation in clear sky using MODIS atmosphere and land products", Proc. SPIE 7083, Remote Sensing and Modeling of Ecosystems for Sustainability V, 70830O (10 September 2008); doi: 10.1117/12.791693; https://doi.org/10.1117/12.791693
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