2011年电离层和太阳活动指数的准21.5天振荡分析

doi:10.11947/j.AGCS.2017.20160067

摘要/Abstract

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

中图分类号:

P227

姚宜斌, 张顺, 孔建. 2011年电离层和太阳活动指数的准21.5天振荡分析[J]. 测绘学报, 2017, 46(1): 9-15.

YAO Yibin, ZHANG Shun, KONG Jian. Analysis of ~21.5 d Period in Ionospheric and Solar Indices during 2011[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(1): 9-15.

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