New method of time series analysis and its application to Wolf's sunspot number data. II: Periodicities of the daily sunspot numbers
The daily sunspot numbers data from 1979 October 1 to 1993 December 31 were analyzed using a new method of time series analysis proposed by the authors, and the long- and short-term periodicities were investigated. A three-dimensional (3D) spectral array of the normalized power spectral densities (P...
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| Veröffentlicht in: | JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP 1997, Vol.36 (2), p.957-968 |
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| container_title | JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP |
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| creator | TERACHI, S OHTOMO, N TANAKA, Y TOKIWANO, K KANEKO, N |
| description | The daily sunspot numbers data from 1979 October 1 to 1993 December 31 were analyzed using a new method of time series analysis proposed by the authors, and the long- and short-term periodicities were investigated. A three-dimensional (3D) spectral array of the normalized power spectral densities (PSD's) obtained by the segment time series analysis revealed the temporal behavior of the 27- and 155-d periodicities in the solar activity minimum. In the normalized 3D spectral array, the solar rotation cycle of 27-d accompanied by its multiplets was confirmed to migrate gradually from the low frequency region toward the high frequency region in the solar activity minimum as the solar activity increases, while the 155-d periodicity exists in the solar activity maximum only. Moreover, the behavior of the daily sunspot numbers variation was conjectured to be deterministic chaos, based on the exponential characteristics of the PSD's and the subharmonic relations of the spectral lines. |
| doi_str_mv | 10.1143/JJAP.36.957 |
| format | Article |
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In the normalized 3D spectral array, the solar rotation cycle of 27-d accompanied by its multiplets was confirmed to migrate gradually from the low frequency region toward the high frequency region in the solar activity minimum as the solar activity increases, while the 155-d periodicity exists in the solar activity maximum only. 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In the normalized 3D spectral array, the solar rotation cycle of 27-d accompanied by its multiplets was confirmed to migrate gradually from the low frequency region toward the high frequency region in the solar activity minimum as the solar activity increases, while the 155-d periodicity exists in the solar activity maximum only. Moreover, the behavior of the daily sunspot numbers variation was conjectured to be deterministic chaos, based on the exponential characteristics of the PSD's and the subharmonic relations of the spectral lines.</abstract><cop>Tokyo</cop><pub>Japanese journal of applied physics</pub><doi>10.1143/JJAP.36.957</doi><tpages>12</tpages></addata></record> |
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| ispartof | JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP, 1997, Vol.36 (2), p.957-968 |
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| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Astronomy Earth, ocean, space Exact sciences and technology Solar physics Solar system Sunspots, faculae, plages |
| title | New method of time series analysis and its application to Wolf's sunspot number data. II: Periodicities of the daily sunspot numbers |
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