On the use of Isaksen-Luther method of computing photodissociation rates in photochemical models
| Autor: | Victor L. Dvortsov, S. P. Smyslaev, S. G. Zvenigorodsky |
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| Rok vydání: | 1992 |
| Předmět: |
Atmospheric Science
Soil Science Aquatic Science Radiation Oceanography Troposphere symbols.namesake chemistry.chemical_compound Ordinate Optics Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Transmittance Rayleigh scattering Earth-Surface Processes Water Science and Technology Physics Ecology business.industry Photodissociation Paleontology Forestry Reflectivity Computational physics Geophysics chemistry Space and Planetary Science symbols Chlorine monoxide business |
| Zdroj: | Journal of Geophysical Research. 97:7593 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/91jd02861 |
| Popis: | Isaksen's algorithm of the photolysis rate calculation in Luther's modification (I-L method) is analyzed. The interpretations suggested by Thompson [1984] and Madronich [1982] are also considered. The accuracy of the I-L method is tested by (1) evaluation of the transmittance and reflectance coefficients for a single homogeneous Rayleigh scattering layer against delta Eddington and discrete ordinate results and (2) comparison of I-L and delta Eddington photolysis rates. These tests show that if the I-L method is applied for calculation of twilight UV photolysis rates, its inaccuracy can exceed 50% (compare 10% according to the earlier estimations). The possible effect of such inaccuracy on model predictions is illustrated by comparing the results obtained by the same one-dimensional PCM successively employing I-L and delta Eddington radiation codes. |
| Databáze: | OpenAIRE |
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