基于小波分析的太阳活动周期性研究

The Periodic Variations of Solar Activity by Wavelet Analysis

为了研究太阳活动的周期性变化规律,采用戈达宇宙航空中心提供的太阳黑子数、F10.7射电流量与太阳风速度数据分析了1700—2015年间太阳活动的变化。发现太阳活动存在4个显著性变化周期:27d、4年、11年和111年,另外还有0.5年、1年、55年的局部显著周期。对太阳黑子数与F10.7射电流量和太阳风速度进行交叉小波分析,结果显示这3个参数在0.062 5—0.125年的尺度上有显著共振性。

In order to analyze the periodic variations of solar activity, the sunspot number（SSN）, F10.7 cm solar flux and solar wind speed supplied by Goddard Space Flight Center has to investigate the variations of solar activity during 1700 2015. The results indicate that solar activity contains four significant periods of 27 day, 4 year, 11 year and 111 year, and periods of significant in the local time span that are 0.5 year, 1 year and 55 year. Furthermore, the relationships among sunspot number. F10.7 solar flux and solar wind speed by cross wavelet transform is analyzed, the results show that there is significant in phase resonance oscillation among three indices in the scale from 0.062 5 to 0.125 year （about 27 day）.