Analysis of the Magnetic Storm’s Influence on Ionospheric in September 2017
-
摘要: 为了进一步研究磁暴对电离层总电子含量变化的影响,基于2017年9月6日太阳爆发X93级特大耀斑并引发磁暴现象,文中将iGMAS提供的全球电离层总电子含量格网数据与中国科学院空间环境预报中心(SEPC)提供的磁暴环电流指数进行相关性分析,并重点分析了磁暴过程中不同阶段环电流指数与全球不同纬度带电离层总电子含量变化的相关性及影响,结果表明:1) 此次特大耀斑爆发13小时后发生大磁暴,磁暴主相阶段环电流指数与滞后1 h的电离层总电子含量相关系数为-0999 7,即随着磁暴加剧电离层总电子含量迅速增加,恢复相阶段迅速减少并趋于稳定;2) 电离层总电子含量变化随磁暴环电流指数变化而变化,两者变化趋势一致,磁暴强度与电离层总电子含量变化呈强负相关性,磁暴对不同纬度带的电离层总电子含量影响趋于一致,影响程度大小由高纬至低纬逐渐递减;3) 磁暴对不同纬度带的电离层总电子含量变化影响不同步,其影响存在由高纬逐渐延伸至低纬,磁暴主相阶段对不同纬度带的影响时延约为1 h,恢复相阶段时延逐渐消失,电离层电离层总电子含量变化趋于稳定;[JP2]4) 此次磁暴恢复相阶段出现的电离层总电子含量异常变化,还有待进一步研究分析。Abstract: In order to study the effect of magnetic storm on the change of ionospheric TEC, this paper collects TEC global grid data from iGMAS and storm Dst index provided by SEPC during solar grade X93 large flares and magnetic storms on September 6 in 2017, and analyzes the correlation in different stages of magnetic storm between Dst index and TEC at different latitudes in the process of the magnetic storm. The results show that: 1)The large magnetic storm occurres 13 hours after the outbreak of the large flare, and the correlation coefficient between the ionospheric TEC lagging 1 hour and Dst index of the main phase during the magnetic storm is -09997, The ionospheric total electron content increase rapidly with the inten sification of magnetic starms, then decreases rapidly and tends to be stable during the recovery phase; 2) The change of TEC varies with the change of Dst index of magnetic storm, and the trends of the two changes are the same. The intensity of magnetic storm has a strong negative correlation with the change of TEC. The effect of magnetic storm on TEC of different latitudes tends to be consistent, and the degree of influence declines gradually from high latitude to low latitude; 3) The TEC changes in the high, medium and low latitudes after the magnetic storms are not synchronized. and the effect is taken in high, medium and low order. The delay of the influence on the different latitudes during the main phase of the magnetic storm is about 1 hour. The delay between Dst index and TEC delay gradually disappears during the recovery phase. With the storm reducing weak the ionospheric TEC change tends to be stable; 4) The abnormal changes of TEC occurre during the phase of magnetic storm recovery need to be further studied and analyzed.
-
Key words:
- Ionospheric TEC /
- sunspot /
- magnetic storm /
- Dst index /
- correlation
-
[1] GOMEY D J. Solar cycle effects on the nearEarth space environment［J］. Reviews of Geophysics, 1990, 28(3):315-336. [2] 丁宗华,陈春.电离层色散效应对线极化雷达信号的影响分析［J］.电波科学学报,2011,26（1）:30-34. [3] 赵海山,杨力,徐世依,等.基于电离层层析技术的欧洲区域磁暴期间电离层变化研究［C］.／／中国卫星导航学术年会，2017. [4] 武业文.利用全球导航卫星研究电离层总电子含量特性［D］.西安：西安电子科技大学,2013. [5] 郭达志,张随甲.电离层TEC的预测模型［J］,测绘工程, 2010, 19(1): 5-8. [6] 李志刚,程宗颐,冯初刚,等.电离层预报模型研究［J］,地球物理学报,2007,50(2):327-337. [7] 郭英,高星伟.卫星定位中电离层与轨道的误差估计理论［M］.北京：测绘出版社, 2015. [8] 百度百科.地磁暴［EB／OL］.https:／／baike.baidu.com／item／％E5％9C％B0％E7％A3％81％E6％9A％B4／10968380?fr=aladdin,201710. [9] 邹自明.太阳风扰动的地磁响应与空间环境应用模式集成［D］.合肥:中国科学技术大学,2014. [10] 李正.电离层暴及“行星际扰动磁暴电离层暴”的观测研究［D］.中国科学院研究生院(空间科学与应用研究中心),2011. [11] 佟昕,宋婕.谈统计学中的相关与回归分析［J］. 辽宁经济管理干部学院(辽宁经济职业技术学院学报),2011,(05):17-18. [12] 程征伟.磁层电离层耦合场向电流研究［D］.北京：中国科学院研究生院(空间科学与应用研究中心),2007. [13] 程征伟,史建魁,ZHANG T L，等.磁尾的等离子体片边界层场向电流密度与地磁活动指数Kp的关系分析［J］.北京：中国科学（技术科学）,2011,41(11):1499-1504. [14] 乐新安.中低纬电离层模拟与数据同化研究［D］.武汉：中国科学院研究生院(武汉物理与数学研究所),2008. [15] 冯建迪,王正涛,时爽爽,等.总电子含量赤道异常变化特性分析［J］.测绘科学,2016,41(6):44-47. -
点击查看大图
计量
- 文章访问数: 434
- HTML全文浏览量: 70
- PDF下载量: 111
- 被引次数: 0
下载:
