太阳磁场的周期性及与太阳总辐照关系的研究

发布时间：2018-04-25 14:51

本文选题：太阳活动 + 磁场　；参考：《中国科学院研究生院(云南天文台)》2015年博士论文

【摘要】：太阳是唯一一颗给地球提供能量的恒星,它驱动着地球上几乎所有已知的自然和生态系统,维持着地球上所有生命适合的生存环境。因此,对太阳活动及其变化规律的研究是非常有意义和必须的。本文主要研究了太阳磁场的周期以及其在太阳周时间尺度上与太阳总辐照的关系,其主要结果如下:1、在威尔逊山天文台(Mount Wilson Observatory,MWO),从1976年1月19日起就开始测量每天的太阳全日面综合磁图,并且利用每天观测的磁图计算了每天的太阳磁场谱斑强度指数(Magnetic Plage Strength Index,MPSI)和威尔逊山黑子指数(Mount Wilson Sunspot Index,MWSI)。MPSI表征的是太阳全日面的弱磁场活动,而MWSI表征的是太阳全日面的强磁场活动。利用MPSI和MWSI这两组时间序列,通过自相关的分析方法调查了太阳全日面磁场活动的周期。MPSI(太阳全日面弱磁场活动)和MWSI(太阳全日面强磁场活动)仅仅只有两个周期:一个是太阳活动周,另一个太阳自转周,并且这两个指数都没有年变化的周期信号。MPSI的太阳活动周周期是10.83年,而MWSI的周期是9.77年,MPSI的周期明显长于MWSI的周期。MPSI的自转周期是26.8±0.63天,而MWSI的自转周期是27.4±2.4天。MPSI的自转周期围绕27.0天并且涨落非常小,而MWSI的自转周期的振幅有一个较大的波动。MWSI在太阳活动极小期附近的自转周期比在太阳活动极大期的自转周期长。MPSI和MWSI的交叉相关分析表明,太阳弱磁场(MPSI)的成分部分是来自于相对早期的太阳强磁场活动(MWSI)。2、利用斯坦福大学威尔科克斯太阳天文台(Wilcox Solar Observatory of the Stanford University,WSO)观测的1975年到2014年的太阳平均磁场数据,应用新的总体经验模式分解(Ensemble Empirical Mode Decomposition,EEMD)来抽取太阳平均磁场的本征模函数(Intrinsic Mode Function,IMF),然后再分析这些本征模函数的周期,以及本征模函数(太阳平均磁场)与一些太阳活动代理物之间的关系。太阳平均磁场有两个特殊的自转周期26.6和28.5天,这两个特殊的周期应该来自太阳平均磁场的不同磁流成分。26.6天的自转周期来自于太阳平均磁场的弱磁流成分,而28.5天的自转周期来自于太阳平均磁场的强磁流成分。而且,黄道面附近的行星际磁场结构的两个自转周期本质上也是分别与太阳平均磁场的弱磁流和强磁流成分相关。太阳平均磁场的弱磁流成分在过去的四十年自转周期是不变的,原因是来自于太阳表面弱磁场活动的弱磁流成分不受纬度漂移的影响。既不是太阳内部的旋转,也不是太阳表面的磁场活动(包括极区磁场)引起太阳平均磁场在年时间尺度上的变化。太阳平均磁场在一个太阳周时间尺度上的变化更多的是与太阳表面的弱磁场活动相关。3、PMOD TSI,ACRIM TSI和RMIB TSI是三组比较典型的TSI合成数据。MPSI和MWSI分别表征太阳全日面的弱和强的磁场活动。三组TSI与MWSI的交叉相关分析表明TSI与MWSI在太阳活动周上是弱相关的,并且二者相位不同。小波调谐和部分小波调谐也指出TSI随太阳周的长周期变化是与MWSI代理的太阳强磁活动无关的。然而,三组TSI与MPSI的交叉相关分析表明TSI与MPSI在太阳活周时间尺度上中度相关并且相位相同,而且统计意义检验指出三组合成的TSI与MPSI的相关系数有统计意义的高于三组合成的TSI与MWSI的相关系数。并且,小波交叉和小波调谐也验证了TSI与MPSI在太阳活动周时间尺度上高度相关并且相位一致。因此,交叉相关分析、小波交叉和小波调谐都指出MPSI表征的太阳全日面的弱磁场活动,控制着TSI随太阳周的长周期变化。
[Abstract]:The sun is the only star that provides energy to the earth. It drives almost all known natural and ecological systems on the earth and maintains all the life's suitable living environment on the earth. Therefore, it is very meaningful and necessary to study the solar activity and its changing laws. This paper mainly studies the cycle of the solar magnetic field and its field. The main results are as follows: 1, at Mount Wilson Observatory (MWO), the daily total solar comprehensive magnetograph of the sun has been measured from January 19, 1976, and the daily solar magnetic field spectrum intensity index (Magnetic) is calculated using the daily observed magnetograph (Magnetic The Plage Strength Index, MPSI) and the Wilson Yama Kuroko exponent (Mount Wilson Sunspot Index, MWSI).MPSI represent the weak magnetic field activity of the solar whole day, while MWSI represents the strong magnetic field activity of the sun, using the two time series of MPSI and the self phase correlation analysis to investigate the activity of the solar whole surface magnetic field. Periodic.MPSI (solar whole day weak magnetic field activity) and MWSI (solar full solar magnetic field activity) only have only two cycles: one is solar activity week, another solar cycle, and the two exponents have no annual variation of periodic signal.MPSI, the cycle of solar activity is 10.83 years, while the cycle of MWSI is 9.77 years, and the cycle of MPSI is obvious The rotation period of the cycle.MPSI longer than MWSI is 26.8 + 0.63 days, while the rotation period of MWSI is 27.4 + 2.4 days, and the rotation period of.MPSI is around 27 days and the fluctuation is very small, while the amplitude of MWSI's rotation period has a larger fluctuation.MWSI in the rotation period of the solar activity minimum. The cross correlation analysis between MPSI and MWSI shows that the component part of the solar weak magnetic field (MPSI) is derived from the relative early solar magnetic field activity (MWSI).2, and the data of the solar average magnetic field from 1975 to 2014 of the Willcocks Solar Observatory of the Stanford University (Wilcox Solar Observatory of the Stanford University) should be observed. Using the new total empirical mode decomposition (Ensemble Empirical Mode Decomposition, EEMD) to extract the eigenmode function of the average solar magnetic field (Intrinsic Mode Function, IMF), and then analyze the period of these eigenmode functions and the relation between the eigenmode function (the sun mean magnetic field) and some solar active agents. The magnetic field has two special rotation cycles of 26.6 and 28.5 days. The two special periods should come from the different magnetic flux components of the average solar magnetic field.26.6 days from the weak magnetic flux of the average solar magnetic field, while the 28.5 day rotation period comes from the strong magnetic flux in the average solar magnetic field. Moreover, the planets near the ecliptic surface. The two rotation period of the magnetic field structure is essentially related to the weak magnetic current and the strong magnetic flux component of the average solar magnetic field. The weak magnetic flux of the average solar magnetic field is unchanged in the past forty years. The reason is that the weak magnetic flux from the weak magnetic field of the solar surface is not influenced by the latitude drift. The rotation in the sun is not the change in the annual scale of the sun's average magnetic field caused by the magnetic field activity on the surface of the sun (including the polar region magnetic field). The changes in the solar average magnetic field on a solar cycle time scale are more related to the weak magnetic field activity on the solar surface.3, PMOD TSI, ACRIM TSI and RMIB TSI are the three groups more typical. The TSI synthesis data.MPSI and MWSI represent the weak and strong magnetic field activities of the solar whole day respectively. The cross correlation analysis between the three groups of TSI and MWSI shows that TSI and MWSI are weakly related to the solar activity week, and the phase of the two is different. The cross correlation analysis between the three groups of TSI and MPSI shows that TSI and MPSI are moderately correlated and phase in the solar cycle time scale, and the statistical significance test indicates that the correlation coefficient of the three combination of TSI and MPSI is statistically significant higher than the correlation coefficient of TSI and MWSI formed by the three combination. The tuning of forks and wavelets also proves that TSI and MPSI are highly correlated and phase in the solar cycle time scale. Therefore, cross correlation analysis, wavelet cross and wavelet tuning all indicate the weak magnetic field activity of the solar whole day characterized by MPSI, which controls the long periodic changes of TSI with the sun.

【学位授予单位】：中国科学院研究生院(云南天文台)
【学位级别】：博士
【学位授予年份】：2015
【分类号】：P182

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