Statistics – Computation
Scientific paper
Mar 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jqsrt..64..585y&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 64, No. 6, p. 585 - 608
Statistics
Computation
10
Radiative Transfer: Numerical Methods, Radiative Transfer: Earth Atmosphere
Scientific paper
The authors discuss the application of correlated k-distribution methods for the computation of radiative transfer through the atmosphere in the visible, near IR, and IR spectral regions. Whereas the correlated k-distribution is a good approximation overall to line-by-line calculations, it is inaccurate in regions of strong absorber overlap. Several approaches (band splitting, strength-based splitting, double and triple correlated k) are proposed to modify the conventional correlated k-distribution and improve its predictions in these regions of absorber line overlap. A comparison with line-by-line computations in the infrared spectral region demonstrates that a combination of these methods produces brightness temperatures within less than 0.25 K of those obtained from line-by-line computations at significantly less computation costs. In the visible and near IR, when atmospheric scattering is included, the new treatment of overlapping mixed gases also produces excellent agreement with the line-by-line model.
Gautier Catherine
Ricchiazzi Paul
Yang Sheng
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