测绘学报 ›› 2017, Vol. 46 ›› Issue (1): 9-15.doi: 10.11947/j.AGCS.2017.20160067

• 大地测量学与导航 • 上一篇    下一篇

2011年电离层和太阳活动指数的准21.5天振荡分析

姚宜斌1, 张顺1, 孔建2   

  1. 1. 武汉大学测绘学院, 湖北 武汉 430079;
    2. 武汉大学中国南极测绘研究中心, 湖北 武汉 430079
  • 收稿日期:2016-02-26 修回日期:2016-11-15 出版日期:2017-01-20 发布日期:2017-02-06
  • 作者简介:姚宜斌(1976-),男,博士,教授,研究方向为测量数据处理理论与方法、GNSS空间环境学。E-mail:ybyao@whu.edu.cn

Analysis of ~21.5 d Period in Ionospheric and Solar Indices during 2011

YAO Yibin1, ZHANG Shun1, KONG Jian2   

  1. 1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
    2. Chinese Antarctic Center of Surveying and Mapping Wuhan University, Wuhan 430079, China
  • Received:2016-02-26 Revised:2016-11-15 Online:2017-01-20 Published:2017-02-06

摘要: 利用傅里叶变换,对2011年电离层总电子含量、太阳黑子相对数、太阳远紫外线0.1~50 nm波段和26~34 nm波段辐射数据、地磁场Kp指数和Dst指数进行功率谱分析,研究了2011年日地空间的准27 d周期振荡。发现在电离层和太阳活动指数中存在偏离27 d的21.5 d准周期振荡,同一时间内地磁活动指数没有发现这一现象,推断这可能是由太阳活动区演变引起的。对近几个太阳活动周的分析表明,21~23 d的准周期信号会在太阳活动上升期重复出现。利用太阳中央子午线左右[-10°,10°]经度范围内的太阳活动区面积,进一步证实2011年地球电离层和太阳指数数据中的21.5 d准周期振动可能是太阳活动区的演变与太阳较差自转的综合影响。利用全球电离层格网数据,研究了地球电离层准27 d周期振荡的全球分布。

关键词: 电离层, 太阳自转, EUV

Abstract: By using Fourier transform, the spectrum of total electron content(TEC) data, relative sunspot number(RSSN), solar extreme ultraviolet(EUV) flux in 0.1~50 nm and 26~34 nm were performed to study the ~27 d period in solar-terrestrial environment. A~21.5 d period was found in TEC and solar indices, while geomagnetic indices showed no sign of this period. We infer that the ~21.5 d period could combined effects of solar rotation and active region evolution. Results of the past few solar cycles show that 21~23 d of quasi-periodic signal will appear in the rising phase of a solar cycle. Using the solar active regions located in the[-10°, 10°] slice, it is further confirmed that the ~21.5 d period observed in 2011 may be caused by the joint effects of solar active region complex and solar rotation. GIM data were used to study the global distribution of the ~27 d period oscillation.

Key words: ionosphere, solar rotation, EUV

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