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Proceedings Paper

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

Paper Details

Date Published: 10 September 2008
PDF: 7 pages
Proc. SPIE 7083, Remote Sensing and Modeling of Ecosystems for Sustainability V, 70830O (10 September 2008); doi: 10.1117/12.791693
Show Author Affiliations
Xiaoping Xie, Nanjing Univ. of Information Science & Technology (China)
Institute of Geographical Sciences and Natural Resources Research (China)
Wei Gao, Colorado State Univ. (United States)
Zhiqiang Gao, Institute of Geographical Sciences and Natural Resources Research (China)
Colorado State Univ. (United States)


Published in SPIE Proceedings Vol. 7083:
Remote Sensing and Modeling of Ecosystems for Sustainability V
Wei Gao; Hao Wang, Editor(s)

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