The Upper Limit of Sunspot Activity as Observed over a Long Time Interval
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Abstract
After analyzing the observational manifestations of the α- and ω-effects of the dynamo theory and using the modified Waldmeier rule, we show that the annual mean Wolf numbers at the maximum of the 11-year cycle that are likely to occur a time interval of 104 years have an upper limit amounting approximately to W EXTR∼230 – 240. Similar values were also obtained using the results by Usoskin et al. (2014, Astron. Astrophys. 562, L10), who considered the probability of various activity levels by reconstructing the variations of solar activity over three thousand years. As an additional result, the predicted maximum of Cycle 24 is refined and is shown to be W M=72 – 132 with a 95 % confidence.
Keywords
Probability Density Function Solar Activity Toroidal Field High Solar Activity Wolf NumberNotes
Acknowledgements
The work was partly supported by the Russian Foundation for Basic Research, grant number 13-02-00277, and by the Programs No. 9 and 41 of the Presidium of the Russian Academy of Sciences.
References
- Dmitrieva, I.V., Kuzanyan, K.M., Obridko, V.N.: 2000, Solar Phys. 195, 209. DOI. CrossRefADSGoogle Scholar
- Hoyt, D.V., Schatten, K.H.: 1998, Solar Phys. 179, 189. DOI. CrossRefADSGoogle Scholar
- Kilcik, A., Anderson, C.N.K., Rozelot, J.P., Ye, H., Sugihara, G., Ozguc, A.: 2009, Astrophys. J. 693, 1173. DOI. CrossRefADSGoogle Scholar
- Nagovitsyn, Yu.A., Kuleshova, A.I.: 2012, Astron. Rep. 56, 800. DOI. CrossRefADSGoogle Scholar
- Nagovitsyn, Yu.A., Pevtsov, A.A., Livingston, W.: 2012, Astrophys. J. Lett. 758, L20. DOI. CrossRefADSGoogle Scholar
- Nagovitsyn, Yu.A., Miletsky, E.V., Ivanov, V.G., Guseva, S.A.: 2008, Cosm. Res. 46, 283. DOI. CrossRefADSGoogle Scholar
- Obridko, V.N., Nagovitsyn, Yu.A., Georgieva, K.: 2012, Astrophys. Space Sci. Proc. 30, 1. DOI. CrossRefADSGoogle Scholar
- Obridko, V.N., Shelting, B.D.: 2009, Astron. Lett. 35, 247. DOI. CrossRefADSGoogle Scholar
- Ogurtsov, M.G.: 2010, Geomagn. Aeron. 50, 475. DOI. CrossRefADSGoogle Scholar
- Ogurtsov, M.G., Nagovitsyn, Yu.A., Kocharov, G.E., Jungner, H.: 2002, Solar Phys. 211, 371. DOI. CrossRefADSGoogle Scholar
- Ozheredov, V.A., Breus, T.K., Obridko, V.N.: 2012, Izv., Atmos. Ocean. Phys. 48, 711. DOI. Google Scholar
- Olemskoy, S.V., Choudhuri, A.R., Kitchatinov, L.L.: 2013, Astron. Rep. 90, 458. DOI. CrossRefADSGoogle Scholar
- Petrovay, K.: 2010, Living Rev. Solar Phys. 7, 1. DOI. CrossRefADSGoogle Scholar
- Solanki, S.K., Usoskin, I.G., Kromer, B., Schüssler, M., Beer, J.: 2004, Nature 431, 1084. DOI. CrossRefADSGoogle Scholar
- Tlatov, A.G., Makarov, V.I.: 2005, ASP Conf. Ser. 346, 415. ADSGoogle Scholar
- Usoskin, I.G.: 2013, Living Rev. Solar Phys. 10, 1. DOI. CrossRefADSGoogle Scholar
- Usoskin, I.G., Solanki, S.K., Kovaltsov, G.A.: 2007, Astron. Astrophys. 471, 301. DOI. CrossRefADSGoogle Scholar
- Usoskin, I.G., Hulot, G., Gallet, Y., Roth, R., Licht, A., Joos, F., Kovaltsov, G.A., Thébault, E., Khokhlov, A.: 2014, Astron. Astrophys. 562, L10. DOI. CrossRefADSGoogle Scholar
- Waldmeier, M.: 1935, In: Astron. Mitt. Eidgen 133, Sternw, Zürich, 1. Google Scholar
- Zeleny, L.M., Veselovsky, I.S.: 2008, In: Plasma Heliogeophysics (Plazmennaya Geliogeofizika) 2, Fizmatlit, Moscow. Google Scholar