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Phase Relations between the Sunspot Numbers and Total Solar Irradiance
Xu JC(徐景晨)1,2,3,4; Xie JL(谢婧岚)1,3,4; Qu, Z. N.5
Source PublicationASTROPHYSICAL JOURNAL
2017-12-20
Volume851Issue:2
DOI10.3847/1538-4357/aa9bda
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: General Sunspots
Abstract

Understanding 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.

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[11573065, 11633008, 11703085] ; Specialized Research Fund for State Key Laboratories ; Sichuan University of Science and Engineering[2015RC43]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000418661900003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordBOOTSTRAP METHODS ; WAVELET TRANSFORM ; MAGNETIC-FIELDS ; CLIMATE-CHANGE ; TIME-SERIES ; INDEX ; RECONSTRUCTION ; VARIABILITY ; RECORDS ; CYCLES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12198
Collection太阳物理研究组
Corresponding AuthorXu JC(徐景晨)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China
4.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
5.Department of Physics, School of Science, Sichuan University of Science & Engineering, Zigong 643000, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu JC,Xie JL,Qu, Z. N.. Phase Relations between the Sunspot Numbers and Total Solar Irradiance[J]. ASTROPHYSICAL JOURNAL,2017,851(2).
APA Xu JC,Xie JL,&Qu, Z. N..(2017).Phase Relations between the Sunspot Numbers and Total Solar Irradiance.ASTROPHYSICAL JOURNAL,851(2).
MLA Xu JC,et al."Phase Relations between the Sunspot Numbers and Total Solar Irradiance".ASTROPHYSICAL JOURNAL 851.2(2017).
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