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Phase Relations between the Sunspot Numbers and Total Solar Irradiance
Xu, J. C.1,2,3,4; Xie, J. L.1,3,4; Qu, Z. N.5
2017-12-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume851Issue:2Pages:9
AbstractUnderstanding the effect of sunspot activities on the variations in the total solar irradiance (TSI) is essential for the interpretation of the variability of TSI as well as its reconstruction. Phase relations between the sunspot numbers (SN) and two TSI composite data are investigated. It is found that TSI and SN are positively correlated, and the former lags the latter by about 29 days, which is approximately a solar rotation period; analyses of the data sets in the four individual cycles show that in cycles 21, 23, and 24, TSI lags SN by 28.9-30.3 days, while in cycle 22, the lag is only 21.8-22.3 days. The abnormality in cycle 22 is probably caused by its stronger magnetic field in sunspots compared with its adjacent cycles. The nonlinearity between TSI and SN is confirmed and explained with the different behavior and effect of spots, faculae, and magnetic network. Based on the cross-wavelet transform and wavelet coherence analysis, a common periodicity between TSI and SN at the timescale of the solar cycle is clearly revealed; at timescales longer than about four years, high values of coherence above the 95% confidence level together with a strong phase synchronization feature are exhibited. At timescales shorter than three rotational periods, the relation between TSI and SN indicates low correlations and a noisy behavior with strong phase mixing due to the lifetime of spots and faculae; moreover, if the short-term effect of spots and faculae is smoothed out, then their coherence reaches high values in partial areas at periods from three rotations to about four years.
KeywordSun: activity Sun: general sunspots
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering
DOI10.3847/1538-4357/aa9bda
WOS KeywordBOOTSTRAP METHODS ; WAVELET TRANSFORM ; MAGNETIC-FIELDS ; CLIMATE-CHANGE ; TIME-SERIES ; INDEX ; RECONSTRUCTION ; VARIABILITY ; RECORDS ; CYCLES
Language英语
Funding ProjectNational Natural Science Foundation of China[11573065] ; National Natural Science Foundation of China[11633008] ; National Natural Science Foundation of China[11703085] ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering[2015RC43]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering ; Sichuan University of Science and Engineering
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000418661900003
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37363
Collection中国科学院国家天文台
Corresponding AuthorXu, J. C.
Affiliation1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
5.Sichuan Univ Sci & Engn, Sch Sci, Dept Phys, Zigong 643000, Peoples R China
Recommended Citation
GB/T 7714
Xu, J. C.,Xie, J. L.,Qu, Z. N.. Phase Relations between the Sunspot Numbers and Total Solar Irradiance[J]. ASTROPHYSICAL JOURNAL,2017,851(2):9.
APA Xu, J. C.,Xie, J. L.,&Qu, Z. N..(2017).Phase Relations between the Sunspot Numbers and Total Solar Irradiance.ASTROPHYSICAL JOURNAL,851(2),9.
MLA Xu, J. C.,et al."Phase Relations between the Sunspot Numbers and Total Solar Irradiance".ASTROPHYSICAL JOURNAL 851.2(2017):9.
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