| タイトル | Transport of photons produced by lightning in clouds |
| 本文（外部サイト） | http://hdl.handle.net/2060/19920006678 |
| 著者（英） | Solakiewicz, Richard |
| 著者所属（英） | Chicago State Univ. |
| 発行日 | 1991-10-01 |
| 言語 | eng |
| 内容記述 | The optical effects of the light produced by lightning are of interest to atmospheric scientists for a number of reasons. Two techniques are mentioned which are used to explain the nature of these effects: Monte Carlo simulation; and an equivalent medium approach. In the Monte Carlo approach, paths of individual photons are simulated; a photon is said to be scattered if it escapes the cloud, otherwise it is absorbed. In the equivalent medium approach, the cloud is replaced by a single obstacle whose properties are specified by bulk parameters obtained by methods due to Twersky. Herein, Boltzmann transport theory is used to obtain photon intensities. The photons are treated like a Lorentz gas. Only elastic scattering is considered and gravitational effects are neglected. Water droplets comprising a cuboidal cloud are assumed to be spherical and homogeneous. Furthermore, it is assumed that the distribution of droplets in the cloud is uniform and that scattering by air molecules is neglible. The time dependence and five dimensional nature of this problem make it particularly difficult; neither analytic nor numerical solutions are known. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 92N15896 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/129047 |
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