Signature of a possible relationship between the maximum CME speed index and the critical frequencies of the F1 and F2 ionospheric layers: Data analysis for a mid-latitude ionospheric station during the solar cycles 23 and 24

被引:2
作者
Kilcik, Ali [1 ]
Ozguc, Atila [2 ,3 ]
Yigit, Erdal [4 ]
Yurchyshyn, Vasyl [5 ,6 ]
Donmez, Burcin [1 ]
机构
[1] Akdeniz Univ, Dept Space Sci & Technol, Fac Sci, TR-07058 Antalya, Turkey
[2] Bogazici Univ, Kandilli Observ, TR-34684 Istanbul, Turkey
[3] Bogazici Univ, Earthquake Res Inst, TR-34684 Istanbul, Turkey
[4] George Mason Univ, Space Weather Lab, Dept Phys & Astron, 4400 Univ Dr,MSN 3F3, Fairfax, VA 22030 USA
[5] Big Bear Solar Observ, Big Bear City, CA 92314 USA
[6] Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 305348, South Korea
基金
美国国家科学基金会;
关键词
Solar activity; Geomagnetic activity; Coronal mass ejections; foF1 and foF2 critical frequencies; LONG-TERM TRENDS; GEOMAGNETIC CONTROL CONCEPT; FOF2; HYSTERESIS; MODEL; PREDICTION; PARAMETERS; PEAKS;
D O I
10.1016/j.jastp.2016.03.011
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
We analyze temporal variations of two solar indices, the monthly mean Maximum CME Speed Index (MCMESI) and the International Sunspot Number (ISSN) as well as the monthly median ionospheric critical frequencies (foF1, and foF2) for the time period of 1996-2013, which covers the entire solar cycle 23 and the ascending branch of the cycle 24. We found that the maximum of foF1 and foF2 occurred respectively during the first and second maximum of the ISSN solar activity index in the solar cycle 23. We compared these data sets by using the cross-correlation and hysteresis analysis and found that both foF1 and foF2 show higher correlation with ISSN than the MCMESI during the investigated time period, but when significance levels are considered correlation coefficients between the same indices become comparable. Cross-correlation analysis showed that the agreement between these data sets (solar indices and ionospheric critical frequencies) is better pronounced during the ascending phases of solar cycles, while they display significant deviations during the descending phase. We conclude that there exists a signature of a possible relationship between MCMESI and foF1 and foF2, which means that MCMESI could be used as a possible indicator of solar and geomagnetic activity, even though other investigations are needed.
引用
收藏
页码:131 / 136
页数:6
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