Estimation of land photosynthetically active radiation in clear sky using MODIS atmosphere and land products

Xiaoping Xie; Wei Gao; Zhiqiang Gao

doi:10.1117/12.791693

10 September 2008 Estimation of land photosynthetically active radiation in clear sky using MODIS atmosphere and land products

Xiaoping Xie, Wei Gao, Zhiqiang Gao

Author Affiliations +

Proceedings Volume 7083, Remote Sensing and Modeling of Ecosystems for Sustainability V; 70830O (2008) https://doi.org/10.1117/12.791693
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Xiaoping Xie, Wei Gao, and 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); https://doi.org/10.1117/12.791693

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