| タイトル | H2 abundance in the atmosphere of Venus |
| 著者（英） | Taylor, H. A., Jr.; Hunten, D. M.; Kumar, S. |
| 著者所属（英） | NASA Goddard Space Flight Center|University of Southern California|Arizona Univ. |
| 発行日 | 1981-03-01 |
| 言語 | eng |
| 内容記述 | The in situ measurements from the Pioneer Venus Orbiter (PVO) Ion Mass Spectrometer have led to the detection of H2(+) ions in the Venus ionosphere. Although H2(+) is a minor ion, its measurement provides the first direct clue for determining the H2 abundance in the upper atmosphere of Venus. A photochemical model using PVO measurements is used to derive an H2 mixing ratio of 10 ppm below 140 km altitude. The presence of this much H2 confirms a previous prediction that the reactions of O(+) with H2 and subsequent recombination of OH(+) provide an important source of nonthermal H observed in the Venus atmosphere. The estimated escape flux for H is 10 to the 8th per sq cm/s. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 81A28481 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/417310 |
