Plasmaspheric response to the geomagnetic storm period March 20-23 1990, observed by the ACTIVNY (MAGION-2) satellite
Plasmaspheric response to the geomagnetic storm period March 20-23 1990, observed by the ACTIVNY (MAGION-2) satellite
复制标题
ACTIVNY (MAGION-2) 卫星观测到的 1990 年 3 月 20 日至 23 日地磁风暴期间的等离子体层响应
DOI：
10.1139/p92-092
复制
发表时间：
1992
影响因子：
1.2
通讯作者：
J. Smilauer
中科院分区：
文献类型：
--
作者：
M. Förster;N. Jakowski;A. Best;J. Smilauer
对 1990 年 3 月 20 日至 23 日风暴期间在 ACTIVNY 实验的 MAGION-2 子卫星上获得的朗缪尔探测器数据进行分析，以研究磁暴的等离子体层和电离层响应。数据表明，下午（LT 18:15）在大约 800 公里高度处有一个明显的电子密度槽赤道边缘，在风暴过程中向低纬度地区移动。有趣的是，在日出后不久的早晨（东部时间 07:30），等离子体层内的电子密度增加了 20% 以上。这是由于主卫星上的离子质谱仪 NAM-5 测量到地磁暴生长阶段低等离子层中的 O+ 密度增加所致。有人认为，密度增加的原因是极光纬度的热层焦耳加热，以及热层压力的相应增加。这种增加的压力导致当地的热层向上和赤道方向膨胀......
Langmuir probe data obtained during the storm period March 20–23, 1990, on board the MAGION-2 subsatellite of the ACTIVNY experiment are analyzed to study the plasmaspheric and ionospheric response to a magnetic storm. The data indicate a well-pronounced equatorward edge of the electron density trough in the afternoon (18:15 LT) at about 800 km height that moves towards lower latitudes during the course of the storm. It is interesting to note that the electron density inside the plasmasphere is increased by more than 20% in the morning shortly after sunrise (07:30 LT). This is due to enhanced O+ densities in the lower plasmasphere during the growth phase of the geomagnetic storm as measured by the ion mass spectrometer NAM-5 onboard the main satellite. It is suggested that the source for the increased density is thermospheric Joule heating at auroral latitudes with a commensurate increase in thermospheric pressure. This increased pressure causes the local thermosphere to expand both upward and equatorward...