中低纬地区电离层对CIR和CME响应的统计分析  

Statistical analysis of the ionosphere response to the CIR and CME in Mid-latitude regions

作　　者：邱娜[1,2] 陈艳红[1] 王文斌 龚建村[1] 刘四清[1] 

机构地区：[1]中国科学院空间科学应用与研究中心,北京100190 [2]中国科学院大学,北京100049 [3]美国大气研究中心,博尔德80307

出　　处：《地球物理学报》2015年第7期2250-2262,共13页Chinese Journal of Geophysics

基　　金：国家重点基础研究发展计划(2012CB825606;2011CB811406)资助

摘　　要：本文利用中低纬日本地区（131°E,35°N）GPS-TEC格点化数据,分析了2001—2009年间109个共转相互作用区（CIR）事件、45个日冕物质抛射（CME）事件引起的地磁扰动期间电离层的响应.结果表明,电离层暴的类型随太阳活动的变化而有不同的变化,CIR事件引发的电离层正相暴、正负双相暴多发生在太阳活动下降年,负相暴多发生在高年,负正双相暴多发生在低年;CME事件引发的电离层正相暴和负相暴多发生在高年.CIR和CME引发的不同类型的电离层暴的季节性差异不大,在夏季多发生正负双相暴.电离层暴发生时间相对地磁暴的时延大部分在-6～6h之间,但CIR引发的电离层暴时延范围更广,在-12～24h之间,而CME引发的电离层暴时延主要在-6～6h之间.中低纬的电离层暴多发生在主相阶段,其中CIR引发的双相暴也会发生在初相阶段.电离层负暴多发生在AE最大值为800～1200nT之间.CIR引起的电离层扰动持续时间较长,一般在1～6天左右,而CME引起的电离层扰动持续时间一般在1～4天左右.The study of the ionosphere responses to Corotating Interaction Regions（CIRs）and Coronal Mass Ejections（CMEs）got much attentions in rencent years.With the comparison of different types of ionosphere response caused by different disturbance sources from solar activity and interplanetary solar wind,morphological changes and physical process of ionospheric storms can be understood more impressively and comprehensively.It provides a possibility to predict ionospheric disturbance states according to different solar wind conditions in advance as well.GPS-TEC data at a mid-latitude station（131°E,35°N）are used to analyze the ionosphere response during geomagnetic disturbances induced by 109 CIRs and 45 CMEs over the period 2001 to 2009.Firstly,the TEC difference are determined to achieve the information of ionospheric positive or negative storms during the CIR and CME events.The definition of a ionosphericstorms is relative TEC greater than or equal to 15% and persisting for more than 4hours;Secondly,year dependence,seasonal dependence,time delay between ionospheric storms and geomagnetic storms,geomantic storm intensity dependence and time duration of ionospheric storms are analyzed in detail.Analysis results indicate that the types of ionospheric storms vary in different phases of a solar cycle.CIR-driven positive and positive-negative storms are more likely to occur in the declining phase of the solar cycle,while negative phase storms more in solar maximum and negative-positive storms mainly in solar minimum.CME-driven positive storms and negative storms mostly occur in solar maximum.There is no remarkable seasonal difference for the occurrence of different types of ionospheric storms except the positive-negative storms most likely to occur in summer.The time delays between geomagnetic disturbances and the start time of ionospheric storms are-6to 6hours in general,but CIR-driven ionopsheric storms involve in a wider range with a time delay of-12 to 24hours and CME-driven storms is delayed from-6to6 hours

关 键 词：电离层暴 CIR CME 磁暴 持续时间 

分 类 号：P352[天文地球—空间物理学]