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Detailed Reference Information |
Cusack, S., Edwards, J.M. and Crowther, J.M. (1999). Investigating k distribution methods for parameterizing gaseous absorption in the Hadley Centre Climate Model. Journal of Geophysical Research 104: doi: 10.1029/1998JD200063. issn: 0148-0227. |
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A technique for generating the coefficients of the k distribution method has been developed which uses very few exponential terms to represent absorption in a spectral region. This new technique, using k distributions derived from HITRAN 1992 spectroscopic data, predicts vertical profiles of irradiances and heating rates due to the major radiatively active gases with a better balance between speed of computation and accuracy than previous methods. Absorption coefficients were specified in a manner similar to that of the correlated k distribution method, whereas the weights of each term were determined using a fitting procedure similar in principle to the exponential-sum fitting of transmissions method. Errors in irradiances and heating rates for various atmospheric profiles and the reference profile (with which fitting of weights was performed) were of a similar magnitude, thereby indicating the technique's suitability for use in global model studies. This parameterization is now used by the Hadley Centre climate model. ¿ 1999 American Geophysical Union |
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Abstract |
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Keywords
Meteorology and Atmospheric Dynamics, Radiative processes, Atmospheric Composition and Structure, Middle atmosphere—composition and chemistry, Hydrology, General or miscellaneous, Meteorology and Atmospheric Dynamics, Climatology |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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