A clear‐sky spectral solar radiation model for snow‐covered mountainous terrain

A clear‐sky spectral solar radiation model for snow‐covered mountainous terrain A clear‐sky spectral solar radiation model for direct and diffuse fluxes, combined with topographic calculations from digital terrain data, computes either incident, net, or reflected solar radiation at any point on a snow surface in mountainous terrain. The radiation may be integrated over any wavelength range from 250 to 5000 nm, or over any time step. Atmospheric attenuation parameters are ozone, water vapor, the Angstrom turbidity coefficient and exponent, and the absorptance to reflectance ratio of the atmospheric aerosols. The model derives these, from measurements which may contain both systematic and random errors, by finding the least squares solution to an overdetermined set of nonlinear equations. For calculations over a specified area, it employs table look‐up procedures, so that computation speed for the spectral model approaches that for a lumped model. Thus it may be useful as part of a snow surface energy budget calculation over a drainage basin. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Resources Research Wiley

A clear‐sky spectral solar radiation model for snow‐covered mountainous terrain

Water Resources Research, Volume 16 (4) – Aug 1, 1980

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Publisher
Wiley
Copyright
Copyright © 1980 by the American Geophysical Union.
ISSN
0043-1397
eISSN
1944-7973
D.O.I.
10.1029/WR016i004p00709
Publisher site
See Article on Publisher Site

Abstract

A clear‐sky spectral solar radiation model for direct and diffuse fluxes, combined with topographic calculations from digital terrain data, computes either incident, net, or reflected solar radiation at any point on a snow surface in mountainous terrain. The radiation may be integrated over any wavelength range from 250 to 5000 nm, or over any time step. Atmospheric attenuation parameters are ozone, water vapor, the Angstrom turbidity coefficient and exponent, and the absorptance to reflectance ratio of the atmospheric aerosols. The model derives these, from measurements which may contain both systematic and random errors, by finding the least squares solution to an overdetermined set of nonlinear equations. For calculations over a specified area, it employs table look‐up procedures, so that computation speed for the spectral model approaches that for a lumped model. Thus it may be useful as part of a snow surface energy budget calculation over a drainage basin.

Journal

Water Resources ResearchWiley

Published: Aug 1, 1980

References

  • A new method of interpolation and smooth curve fitting based on local procedures
    Akima, Akima
  • An approach toward energy balance simulation over rugged terrain
    Dozier, Dozier; Outcalt, Outcalt
  • Energy balance computations of snowmelt in a subarctic area
    Price, Price; Dunne, Dunne

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