(第二炮兵工程大學(xué) 907室，西安 710025)
摘 要: 利用1996~2004年中緯度地區(qū)的地磁和電離層總電子含量(TEC)數(shù)據(jù)，對(duì)發(fā)生的119次磁暴期間電離層TEC擾動(dòng)與地磁擾動(dòng)的相關(guān)關(guān)系進(jìn)行統(tǒng)計(jì)研究，詳細(xì)分析磁暴期間TEC發(fā)生擾動(dòng)的頻次以及TEC擾動(dòng)與磁暴發(fā)生的先后關(guān)系，不同磁暴強(qiáng)度與TEC擾動(dòng)頻次的相關(guān)性以及磁暴發(fā)生的季節(jié)、地方時(shí)與TEC擾動(dòng)頻次的相關(guān)性。結(jié)果表明：有99.1%的磁暴會(huì)伴隨發(fā)生TEC擾動(dòng)，其中TEC超前擾動(dòng)占71.4%，TEC滯后擾動(dòng)占27.7%；急始磁暴與TEC超前擾動(dòng)的相關(guān)性為80%，TEC負(fù)相擾動(dòng)與超前擾動(dòng)的相關(guān)性為100%；中烈磁暴和強(qiáng)烈磁暴下TEC發(fā)生擾動(dòng)的概率為100%，磁暴和TEC擾動(dòng)在秋季出現(xiàn)的頻次最高，在春季出現(xiàn)的頻次最低；磁暴次數(shù)年變化與TEC擾動(dòng)次數(shù)年變化的相關(guān)系數(shù)為0.763 2，日變化相關(guān)系數(shù)為0.739 9。
關(guān)鍵字: 磁暴；電離層TEC擾動(dòng)；相關(guān)性；統(tǒng)計(jì)分析
（Section 907, The Second Artillery University of Engineering, Xi’an 710025, China）
Abstract:The correlation between ionospheric and geomagnetic variations during the geomagnetic storms was studied statistically. The geomagnetic data and ionospheric total electric content (TEC) data were observed in mid-latitude area from 1996 to 2004. The occurrence rate of TEC disturbance, the time of magnetic storms and TEC disturbance appearing, the correlation between magnetic disturbance intense and TEC disturbance occurrence rate, and the correlations among the seasons and local time (LT) of magnetic disturbance and TEC disturbance were analyzed. The results show that the TEC disturbance occurrence rate during magnetic storms is 99.1%, in which TEC disturbance occurring earlier than magnetic storm is 71.4%, and later than magnetic storm is 27.7%. The correlation coefficient between sudden commence magnetic storm and leading-forward TEC disturbance is 80%, the correlation coefficient between negative phase TEC disturbance and the leading-forward TEC disturbance is 100%. The occurrence rate of TEC disturbance of middle strong (MS) storms and strong storms is 100%. The occurrence rate of magnetic storms and TEC disturbance is the highest in autumn and the lowest in spring. The annual times correlation coefficient between magnetic storms and TEC disturbance is 0.763 2, and the daily times correlation coefficient is 0.739 9.
Key words: geomagnetic storm; ionospheric TEC disturbance; correlation; statistical analysis
