LONGTERM CHANGES OF SOLAR ACTIVITY ASYMMETRY

Автор(и)

DOI:

https://doi.org/10.18524/1810-4215.2015.28.71078

Ключові слова:

Sun, Solar activity – Sunspots area, Solar activity – Magnetic fields, Data analysis – Methods, Cumulative sum

Анотація

We report results of analysis of the northsouth asymmetry of solar activity, solar magnetic fields. The analysis is based on the sunspot data, 1875–2015 (http://solarscience.msfc.nasa.gov/greenwch.shtml), largescale solar magnetic field (solar mean magnetic field, SMMF) and solar polar magnetic field time series, 1975– 2015 (http://wso.stanford.edu). To study long-term changes of solar activity asymmetry we applied analysis of cumulative sum. Cumulative sum averages shortperiodic changes and identifies long-term periodicity. Minimum of cumulative sum of sunspot area mean monthly values time series occurs in ~1910, maximum – in ~1980. Perhaps this is branch growth of long-term (~140-years) cycle of solar activity asymmetry. Cumulative sums of polar magnetic field of different pole have ~22-years periodicity. Change of cumulative sum of SMMF time series has different character. But long-run trend with intervals of positive and (or) negative polarity of ~22 years is observed.

Посилання

Babcock, H.W.: 1961, Astrophys. J., 133, 572.

Carbonell M. et al.: 2007, Astron. Astrophys., 476, 951.

Donner R. Thiel M.: 2007, Astron. Astrophys., 475, L33.

Hale, G.E.: 1908, Astrophys. J., 28, 315.

Leiko U.M.: 2011, Visn. Kiev. Univ. Astronomy, 47, 23.

Leiko U.M.: 2013, Izv. Crim. Astrofiz. Obs., 109, 67.

Mordvinov A.V.: 2006, Astron. Zh., 83, 1042.

##submission.downloads##

Опубліковано

2016-06-13

Номер

Розділ

Сонце, сонячна активність та астробіологія