| Title | Ion upflow in the topside polar ionosphere; observations by the DMSP satellite |
| Author | Huo Liang; Ma Shuying; Zhou Yunliang; Dang Ge |
| Author Affil | Huo Liang, Wuhan University, College of Electronic Information, Wuhan, China |
| Source | Jidi Yanjiu = Chinese Journal of Polar Research, 18(2), p.98-107. Publisher: Science Press, Beijing, China. ISSN: 1007- 7073 |
| Publication Date | Jun. 30, 2006 |
| Notes | In Chinese with English summary. 10 refs. GeoRef Acc. No: 299786. CRREL Acc. No: 64004353 |
| Index Terms | ions; polar regions; remote sensing; Antarctica; Arctic region; polar regions; Defense Meteorological Satellite Program; DMSP; ionosphere; observations; plasma; satellite methods |
| Abstract | Based on a large dataset of ion drift velocity measurements from a DMSP satellite, the plasma bulk upflowing in the topside polar ionosphere was studied. The emphasis is placed on storm-time changes in the distribution of upflow occurrence and intensity versus MLT (mainly dawn and dusk) compared to quiet periods, as well as the relationship between the ion upflow and plasma convection and its shear. The results show that the frequency of storm-time upflow events is nearly two times higher than the frequency of such events during quiet periods; the dawn-dusk asymmetry of occurrences is inverted, favoring dusk-side to favoring dawn-side. On average, the storm- time velocity of the ion upflow in the dawn sector is larger than that in the dusk sector, with maximum upflow velocity much greater than that in the dusk sector. The ion upflow is closely related to plasma convection and its shear, with strong upflow usually accompanied by large convection shear or abnormally large convection itself. |
| Publication Type | journal article |
| Record ID | 88297 |