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Title: Atmospheric transmittance model for photosynthetically active radiation

A parametric model of the atmospheric transmittance in the PAR band is presented. The model can be straightforwardly applied for calculating the beam, diffuse and global components of the PAR solar irradiance. The required inputs are: air pressure, ozone, water vapor and nitrogen dioxide column content, Ångström's turbidity coefficient and single scattering albedo. Comparison with other models and ground measured data shows a reasonable level of accuracy for this model, making it suitable for practical applications. From the computational point of view the calculus is condensed into simple algebra which is a noticeable advantage. For users interested in speed-intensive computation of the effective PAR solar irradiance, a PC program based on the parametric equations along with a user guide are available online at http://solar.physics.uvt.ro/srms.
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Physics Department, West University of Timisoara, V Parvan 4, 300223 Timisoara (Romania)
  2. Department of Physical Foundations of Engineering, Politehnica University of Timisoara, V Parvan 2, 300223 Timisoara (Romania)
  3. Mechanical Engineering Faculty, Politehnica University of Timisoara, Mihai Viteazu 1, 300222 Timisoara (Romania)
Publication Date:
OSTI Identifier:
22280641
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1564; Journal Issue: 1; Conference: TIM 2012 physics conference, Timisoara (Romania), 27-30 Nov 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; AIR; ALBEDO; CALCULATION METHODS; COMPARATIVE EVALUATIONS; DIFFERENTIAL EQUATIONS; EARTH ATMOSPHERE; GEOPHYSICS; LIGHT SCATTERING; MATHEMATICAL MODELS; NITROGEN DIOXIDE; OZONE; RADIANT FLUX DENSITY; TURBIDITY; VELOCITY; WATER VAPOR