| Autor: |
Paulette Middieton, A. Rachel Laird, R. W. Miksad, Frederick L. Jones |
| Rok vydání: |
1981 |
| Předmět: |
|
| Zdroj: |
Journal of the Air Pollution Control Association. 31:42-45 |
| ISSN: |
0002-2470 |
| DOI: |
10.1080/00022470.1981.10465185 |
| Popis: |
A method based on hourly NWS cloud amount reports is presented for developing a simple model to account for cloud cover in the determination of the nitrogen dioxide photolysis rate constant, k 1 The model is parameterized and verified with direct UV radiometer and k 1 measurements (vs. time of day) collected by Sickles, et al. 1 at Research Triangle Park. Application of our model to variable cloud condition situations indicates that significant improvement in k 1 prediction is obtained by including the influence of cloud cover. Comparison of our model with the radiative transfer calculations of Peterson7 indicates that the particular parameterization of k 1 given here is most representative of average albedo and relatively heavy aerosol loading conditions. Comparison of ozone predictions using hourly averaged k 1 and instantaneous k 1 under conditions of varying cloud cover suggest that the errors resulting from averaging k 1 are largest when variations in solar zenith angle are significant over the hour. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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