| タイトル | Simultaneous observations of neutral winds and electric fields at spaced locations in the dawn auroral oval |
| 著者（英） | Mikkelsen, I. S.; Meriwether, J. W.; Niciejewski, R.; Vickery, K.; Larsen, M. F. |
| 著者所属（英） | Clemson Univ.|Danish Meteorological Inst.|Michigan Univ.|Air Force Geophysics Lab. |
| 発行日 | 1989-12-01 |
| 言語 | eng |
| 内容記述 | Results are presented on simultaneous observations of neutral winds and electric fields at spaced locations in the dawn auroral oval, carried out during a chemical release experiment on March 21, 1987. The observed plasma drifts and electron densities indicated the presence of a significant coupling between plasma and neutrals at the altitude of the F region but little coupling in the lower E region. The wind variations in the height range between 95 and 130 km were suggestive of the variations and amplitudes expected if the flow was dominated by the semidiurnal tide. However, a comparison of the flow with the model developed by Forbes (1982) showed that the phase differs by 4-5 hours from the predictions. Moreover, the measured divergence and vorticity in the flow are much larger than those predicted by the model, indicating that higher-order modes than those treated by Forbes may contribute significantly to the high-latitude thermospheric flow. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 90A20756
AD-A219585 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/358703 |
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