Phase analysis of sunspot group numbers on both solar hemispheres
Cross-correlation analysis and wavelet transform methods are proposed to investigate the phase relationship between the monthly sunspot group numbers in the solar northern and southern hemispheres. It is found that （1） the monthly sunspot group numbers in the northern hemisphere begin two months ear...
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| Veröffentlicht in: | Research in astronomy and astrophysics 2013, Vol.13 (1), p.104-114 |
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| container_title | Research in astronomy and astrophysics |
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| creator | Deng, Lin-Hua Qu, Zhong-Quan Yan, Xiao-Li Wang, Kai-Rang |
| description | Cross-correlation analysis and wavelet transform methods are proposed to investigate the phase relationship between the monthly sunspot group numbers in the solar northern and southern hemispheres. It is found that （1） the monthly sunspot group numbers in the northern hemisphere begin two months earlier than those in the southern one, which should lead to phase asynchrony between them but with a slight effect; （2） the Schwabe cycle length for the monthly sunspot group numbers in the two hemispheres obviously differs from each other, and the mean Schwabe cycle length of the monthly sunspot group numbers in the northern hemisphere is slightly larger than that in the southern one; （3） the monthly sunspot group numbers in the northern hemisphere precede those in the southern hemisphere during the years of about 1874- 1927, after which, the southern hemisphere leads the northern hemisphere in the years 1928-1964, and then the northern hemisphere leads in time till the present. |
| doi_str_mv | 10.1088/1674-4527/13/1/011 |
| format | Article |
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It is found that （1） the monthly sunspot group numbers in the northern hemisphere begin two months earlier than those in the southern one, which should lead to phase asynchrony between them but with a slight effect; （2） the Schwabe cycle length for the monthly sunspot group numbers in the two hemispheres obviously differs from each other, and the mean Schwabe cycle length of the monthly sunspot group numbers in the northern hemisphere is slightly larger than that in the southern one; （3） the monthly sunspot group numbers in the northern hemisphere precede those in the southern hemisphere during the years of about 1874- 1927, after which, the southern hemisphere leads the northern hemisphere in the years 1928-1964, and then the northern hemisphere leads in time till the present.</description><identifier>ISSN: 1674-4527</identifier><identifier>EISSN: 2397-6209</identifier><identifier>DOI: 10.1088/1674-4527/13/1/011</identifier><language>eng</language><subject>Astronomy ; Astrophysics ; Hemispheres ; Northern Hemisphere ; Phase relationships ; Southern Hemisphere ; Sunspots ; Wavelet transforms ; 交叉相关分析 ; 北半球 ; 南半球 ; 周期长度 ; 太阳能 ; 小波变换方法 ; 物相分析 ; 黑子群</subject><ispartof>Research in astronomy and astrophysics, 2013, Vol.13 (1), p.104-114</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c449t-cec6d0b258c76a9313c9d61ce703884840133b77c82a08ad48f252d0227fe98f3</citedby><cites>FETCH-LOGICAL-c449t-cec6d0b258c76a9313c9d61ce703884840133b77c82a08ad48f252d0227fe98f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/94947C/94947C.jpg</thumbnail><link.rule.ids>314,777,781,4010,27904,27905,27906</link.rule.ids></links><search><creatorcontrib>Deng, Lin-Hua</creatorcontrib><creatorcontrib>Qu, Zhong-Quan</creatorcontrib><creatorcontrib>Yan, Xiao-Li</creatorcontrib><creatorcontrib>Wang, Kai-Rang</creatorcontrib><title>Phase analysis of sunspot group numbers on both solar hemispheres</title><title>Research in astronomy and astrophysics</title><addtitle>Chinese Journal of Astronomy and Astrophysics</addtitle><description>Cross-correlation analysis and wavelet transform methods are proposed to investigate the phase relationship between the monthly sunspot group numbers in the solar northern and southern hemispheres. 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| identifier | ISSN: 1674-4527 |
| ispartof | Research in astronomy and astrophysics, 2013, Vol.13 (1), p.104-114 |
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| language | eng |
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| source | IOP Publishing Journals; Alma/SFX Local Collection |
| subjects | Astronomy Astrophysics Hemispheres Northern Hemisphere Phase relationships Southern Hemisphere Sunspots Wavelet transforms 交叉相关分析 北半球 南半球 周期长度 太阳能 小波变换方法 物相分析 黑子群 |
| title | Phase analysis of sunspot group numbers on both solar hemispheres |
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