| Wavelet Analysis of Several Important Periodic Properties in the Relative Sunspot Numbers |
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| 作者姓名： | Gui-Ming Le and Jia-Long Wang
Center for Space Science and Applied Research Chinese academy of Sciences Beijing lgm
National Astronomical Observatories Chinese Academy of Sciences Beijing |
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| 作者单位： | Gui-Ming Le and Jia-Long Wang
1 Center for Space Science and Applied Research，Chinese academy of Sciences，Beijing 100080; lgm
2 National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 |
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| 基金项目： | Supported by the National Natural Science Foundation of China |
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| 摘 要： | We investigate the wavelet transform of yearly mean relative sunspot number series from 1700 to 2002. The curve of the global wavelet power spectrum peaks at 11-yr, 53-yr and 101-yr periods. The evolution of the amplitudes of the three periods is studied. The results show that around 1750 and 1800, the amplitude of the 53-yr period was much higher than that of the the 11-yr period, that the ca. 53-yr period was apparent only for the interval from 1725 to 1850, and was very low after 1850, that around 1750, 1800 and 1900, the amplitude of the 101-yr period was higher than that of the 11-yr period and that, from 1940 to 2000, the 11-yr period greatly dominates over the other two periods.
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| 关 键 词： | 小波分析 太阳黑子数 太阳活动 数据分析 周期性 |
Wavelet Analysis of Several Important Periodic Properties in the Relative Sunspot Numbers |
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| Gui-Ming Le and Jia-Long Wang
Center for Space Science and Applied Research,Chinese academy of Sciences,Beijing , lgm
National Astronomical Observatories,Chinese Academy of Sciences,Beijing .Wavelet Analysis of Several Important Periodic Properties in the Relative Sunspot Numbers[J].Chinese Journal of Astronomy and Astrophysics,2003,3(5):391-394. |
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| Authors: | Gui-Ming Le Jia-Long Wang |
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| Institution: | [1]CenterforSpaceScienceandAppliedResearch,ChineseacademyofSciences,Beijing100080 [2]NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 |
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| Abstract: | We investigate the wavelet transform of yearly mean relative sunspot number series from 1700 to 2002. The curve of the global wavelet power spectrum peaks at ll-yr, 53-yr and 101-yr periods. The evolution of the amplitudes of the three periods is studied. The results show that around 1750 and 1800, the amplitude of the 53-yr period was much higher than that of the the ll-yr period, that the ca.53-yr period was apparent only for the interval from 1725 to 1850, and was very low after 1850, that around 1750, 1800 and 1900, the amplitude of the 101-yr period was higher than that of the ll-yr period and that, from 1940 to 2000, the ll-yr period greatly dominates over the other two periods. |
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| Keywords: | Sun: sunspots - Sun: activity - methods: data analysis |
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