| 1989年3月13日磁暴的亚极光区电离层效应 |
| |
| 引用本文： | 刘瑞源,刘顺林,温波,刘长发.1989年3月13日磁暴的亚极光区电离层效应[J].极地研究,1994,6(1):20-27. |
| |
| 作者姓名： | 刘瑞源 刘顺林 温波 刘长发 |
| |
| 作者单位： | 中国极地研究所，中国电波传播研究所，中国科学院地球物理所 |
| |
| 摘 要： | 利用南极长城站（６２°１３′Ｓ，５８°５８′Ｗ）频高图和磁照图研究了１９８９年３月１３日磁暴的亚极光区电离层效应。在紧接着磁暴急始后Ｆ层的虚高ｈ′Ｆ急剧上升，临频ｆ０Ｆ２急剧下降，然后出现扩展Ｆ并持续几小时。在磁暴主相，电离层出现严重的吸收，但有时仍能观测到ｈ′Ｆ的增加和伴随着的ｆ０Ｆ２的降低。在磁暴急始后的第二和第三个晚上观测到极光型Ｅｓ和夜间Ｅ层，其峰值电子浓度高达７．５×１０５ｅｌ／ｃｍ３，文中讨论了造成这些现象的原因。在同一经度扇区的４个电离层站的ｈ′Ｆ和ｆ０Ｆ２的行为表明，观测站的纬度越高出现的吸收越严重，ｆ０Ｆ２呈下降的时间越长。
|
| 关 键 词： | 磁暴 电离层 亚极光区 |
IONOSPHERIC EFFECTS OF THE MARCH 13,1989 MAGNETIC STORM AT SUBAURORAL REGION |
| |
| Liu Ruiyuan,Liu Shunlin.IONOSPHERIC EFFECTS OF THE MARCH 13,1989 MAGNETIC STORM AT SUBAURORAL REGION[J].Chinese Journal of Polar Research,1994,6(1):20-27. |
| |
| Authors: | Liu Ruiyuan Liu Shunlin |
| |
| Abstract: | Ionograms and magnetograms at Great Wall (62°13′S,58°58′W),Antarctica,were used to study the sub auroral ionospheric effects of the March 13,1989 magnetic storm.The virtual height of the F region (h′F) increased and the critical frequency(f 0F 2) decreased rapidly just after the storm's sudden commencement(SSC).Then the spread F appeared and lasted about five hours. During the main phase of the magnetic storm the ionosphere encountered severe absorptions,but large enhancements in h′F and associated depressions in f 0F 2 sometimes were still observed.On the second and third nights after the SSC auroral type sporadic E and night E layers were observed,showing peak electron densities as high as 7.5×10 5el cm -3 .The causes of these phenomena are discussed. Behaviours of h′F and f 0F 2 from four ionosonde stations in the same longitude sector ( Great Wall,Port Stanley,Cachoeira Paulista and Fortaleza) show that the higher the station's latitude is, the more severe absorptions occure, and the longer the depressions of f 0F 2 last. |
| |
| Keywords: | s magnetic storm ionosphere subauroral region |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《极地研究》浏览原始摘要信息 |
| 点击此处可从《极地研究》下载免费的PDF全文 |
|
