1998年5月磁暴事件期间全球电离层响应形态与机制的研究  

THE GLOBAL IONOSPHERIC RESPONSE TO THE GEOMAGNETIC STORM EVENT DURING MAY 1998

作　　者：张满莲[1] 尚社平[1] 郭兼善[1] 罗熙贵[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100080

出　　处：《空间科学学报》2001年第2期131-140,共10页Chinese Journal of Space Science

基　　金：国家自然科学基金资助项目!(49704057)

摘　　要：利用全球 ４０余个电离层台站的 ｆ０Ｆ２观测数据，采取对经度进行分区处理的方法，通过计算各台站 ｆ０Ｆ２参数对其月中值的偏离百分比，对 １９９８年 ５月大磁暴期间的电离层扰动形态进行了分析，并对可能的扰动机制进行了探讨．结果表明本次磁暴事件中，在磁暴主要活动相期间的电离层扰动与暴环流理论所描述的电离层扰动特征相符，但在恢复相后期欧洲扇区台站出现的正相扰动似不能用暴环流理论来解释，它可能与对应期间的行星际条件（太阳风与行星际磁场）的变化有关．Using the ionospheric characteristic parameter f0F2 observed in more than 40 ionosonde stations distributed over the world, the response of the ionosphere to the geomagnetic storm event during May 1998 is studied by calculating the percentage deviation of the daily f0F2 value from its monthly median value for these stations which are divided into 5 regions according to their longitudinal distribution. The results showed that the characteristics of the ionospheric disturbance during the active phase of the storm can be explained by the storm circulation theory, but it seems that the positive disturbance appearing in the European region during the late recovery phase could not be attributed to this explanation.

关 键 词：电离层暴 扰动形态 扰动机制 全球响应 磁暴 1998年 

分 类 号：P352.4[天文地球—空间物理学]