Physics – Optics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jats...33.2452j&link_type=abstract
Journal of the Atmospheric Sciences, vol. 33, Dec. 1976, p. 2452-2459.
Physics
Optics
178
Albedo, Atmospheric Optics, Atmospheric Scattering, Delta Function, Eddington Approximation, Radiative Transfer, Absorptivity, Atmospheric Circulation, Atmospheric Models, Atmospheric Radiation, Climatology, Monochromatic Radiation, Parameterization, Reflectance, Transmissivity
Scientific paper
Simple approximations, like the Eddington, are often incapable of coping with the highly asymmetric phase functions typical of particulate scattering. A simple yet accurate method called the delta-Eddington approximation is proposed for determining monochromatic radiative fluxes in an absorbing-scattering atmosphere. In this method, the governing phase function is approximated by a Dirac delta function forward scatter peak and a two-term expansion of the phase function. The fraction of scattering into the truncated forward peak is taken proportional to the square of the phase function asymmetry factor, which distinguishes the delta-Eddington approximation from others of similar nature. The transmission, reflection, and absorption predicted by the delta-Eddington approximation are compared with doubling method calculations for realistic ranges of optical depth, single-scattering albedo, surface albedo, sun angle and asymmetry factor. The approximation is shown to provide an accurate and analytically simple parameterization of radiation to replace the empirism currently encountered in many general circulation and climate models.
Joseph Joachim H.
Weinman J. A.
Wiscombe Warren J.
No associations
LandOfFree
The delta-Eddington approximation for radiative flux transfer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The delta-Eddington approximation for radiative flux transfer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The delta-Eddington approximation for radiative flux transfer will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1050571