| タイトル | An example of the nonlinearity of clear and cloudy radiant exitances in the presence of three-dimensional cloud structure |
| 著者（英） | Barkstrom, B. R. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1981-01-01 |
| 言語 | eng |
| 内容記述 | It is nearly universally assumed that the relationship between fractional cloud cover and radiant exitance is linear. There seems to be, however, little quantitative justification for this assumption, and recent work appears to cast considerable doubt even on this assumption. The reported investigation reinforces this doubt. It is found that the radiation field over three-dimensional broken clouds may differ markedly from that over two-dimensional fields. Including the thickness of the clouds appears to be equivalent to increasing the cloud cover. Broken clouds with finite thicknesses are found to be more effective at influencing radiation than are infinitely thin clouds of finite optical depth. Attention is given to the effect of the geometric arrangement of cloud fields. It is pointed out that this arrangement can cause substantial deviations from the often used linear relationship. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 82A16838 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/412761 |
