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Development of a semi-parametric PAR (Photosynthetically Active Radiation) partitioning model for the United States, version 1.0 Public Deposited

https://ir.library.oregonstate.edu/concern/articles/5425kc54v

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Abstract
  • A semi-parametric PAR diffuse radiation model was developed using commonly measured climatic variables from 108 site-years of data from 17 AmeriFlux sites. The model has a logistic form and improves upon previous efforts using a larger data set and physically viable climate variables as predictors, including relative humidity, clearness index, surface albedo and solar elevation angle. Model performance was evaluated by comparison with a simple cubic polynomial model developed for the PAR spectral range. The logistic model outperformed the polynomial model with an improved coefficient of determination and slope relative to measured data (logistic: R² = 0.76; slope = 0.76; cubic: R² = 0.73; slope = 0.72), making this the most robust PAR-partitioning model for the United States currently available.
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  • Kathilankal, J. C., O'Halloran, T. L., Schmidt, A., Hanson, C. V., & Law, B. E. (2014). Development of a semi-parametric PAR (Photosynthetically Active Radiation) partitioning model for the United States, version 1.0. Geoscientific Model Development, 7(5), 2477-2484. doi:10.5194/gmd-7-2477-2014
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  • This research was supported by the Office of Science (BER), US Department of Energy (DOE, Grant nos. DE-FG02-06ER64307 and DE-FG02-06ER64316).
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