夜侧极区电离层对流对行星际激波的响应

利用超级双子极光雷达网（Super Dual Aurora Radar Network，SuperDARN）高频雷达、北半球IMAGE地磁台链以及南极中山站的极光观测数据，研究电离层对流对2012年7月14日一个行星际激波扰动事件的响应.在18:10UT行星际激波到达地球并与磁层相互作用触发地磁急始和磁层亚暴，SuperDARN雷达观测到北半球夜侧极区电离层对流显著增强，观测视野覆盖黄河站的Hankasalmi雷达观测到从激波到达地球至18:33UT，电离层F层出现剧烈扰动，雷达回波数明显增多，并出现局部对流速度反转现象.18:33UT之后，观测到F层出现三块速度高达600m·s-1的逆阳运动不规则体.而与Hankasalmi雷达地磁共轭的南半球Kerguelen雷达探测到的回波主要来自E层，回波数量几乎无变化，但是Kerguelen雷达观测视野内的中山站全天空光学成像仪观测到极光活动显著增强.南北半球夜侧电离层观测结果的差异，主要是由于它们分别处于极夜和极昼. 

Case study on nightside polar ionospheric convection response to interplanetary shock (in Chinese)

An interplanetary shock event on 14 July 2012 is studied using observations with Super Dual Aurora Radar Network (SuperDARN), northern hemispheric IMAGE magnetometer chain and All-sky Aurora Imagers at Zhongshan station, Antarctica. At 18:10UT, an interplanetary shock struck the magnetosphere and induced geomagnetic sudden commencement. Observations of SuperDARN present that the ionosphere convection of northern hemisphere was enhanced obviously. The Hankasalmi radar, whose field of view covers the Yellow River station, found that the ionospheric F layer was severely disturbed, e.g. the echoes number increased obviously and inversion phenomenon of local ionospheric convection speed emerged from 18:10UT to 18:33UT. There are three irregularities in F layer measured by Hankasalmi radar and their speeds in line-of-sight reached 600m·s-1 after 18:33UT. Kerguelen radar around Zhongshan, conjugating with the Yellow River station, observed that the number of the echoes had little change and the echoes are mainly from E layer and there are almost no echoes from F layer. However, the All-sky Imagers at Zhongshan station observed the enhancement of aurora activity. The observation difference of northern and southern hemispheres nightside ionospheric responses are mainly because of that they were at polar night and polar day respectively.