The proposed “Waldmeier discontinuity”: How does it affect to sunspot cycle characteristics?

Journal of Space Weather and Space Climate

María Cruz Gallego¹  Alejandro Jesús Pérez Aparicio José Manuel Vaquero¹ 

[1] Departamento de Física, Universidad de Extremadura,06800 Mérida,Spain

关键词: historical records;    space climate;    sunspot;    solar cycle;    solar activity;   

Others  :  800683
DOI  :  doi:10.1051/swsc/2012012

【 摘 要 】

Recently, Svalgaard has proposed that Waldmeier introduced a discontinuity in the International Sunspot Number (ISN) around 1945. In this paper, we study some characteristics of the sunspot cycle using the classical ISN and the proposed version derived from the “Waldmeier discontinuity”. We conclude that this proposed version does not significantly improve the statistics of the characteristics of solar cycle.

【 授权许可】

   
© Owned by the authors, Published by EDP Sciences 2012

【 图 表 】

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【 参考文献 】

• [1]Cameron, R., and M. Schüssler, Solar cycle prediction using precursors and flux transport models, ApJ, 659, 801–811, 2007. [NASA ADS]
• [2]Charbonneau, P., and M. Dikpati, Stochastic fluctuations in a Babcock-Leighton model of the solar cycle, Astrophys. J., 543, 1027–1043, 2000. [NASA ADS]
• [3]Chernosky, E.J., A relationship between the length and activity of sunspot cycles, Publ. Astron. Soc. Pac., 66 (392), 241–247, 1954.
• [4]Clette, F., D. Berghmans, P. Vanlommel, R.A.M. van der Linden, A. Koeckelenbergh, and L. Wauters, From the Wolf Number to the International Sunspot Index: 25 years of SIDC, Adv. Space Res., 40 (7), 919–928, 2007. [NASA ADS]
• [5]Dikpati, M., P.A. Gilman, and G. de Toma, The Waldmeier effect: An artifact of the definition of Wolf sunspot number? ApJ, 673, L99–L101, 2008. [NASA ADS]
• [6]Du, Z., and S. Du, The relationship between the amplitude and descending time of a solar activity cycle, Sol. Phys., 238 (2), 431–437, 2006.
• [7]Du, Z.-L., H.-N. Wang, and X.-T. He, The relation between the amplitude and the period of solar cycles, Chin. J. Astron. Astrophys., 6, 489–494, 2006.
• [8]Faria, H.H., E. Echer, N.R. Rigozo, L.E.A. Vieira, D.J.R. Nordemann, and A. Prestes, A comparison of the spectral characteristics of the Wolf Sunspot Number (RZ) and Group Sunspot Number (RG), Sol. Phys., 223 (1–2), 305–318, 2004.
• [9]Getko, R., The intermediate-term quasi-cycles of Wolf Number and Group Sunspot Number fluctuations, Sol. Phys., 238 (1), 187–206, 2006.
• [10]Hathaway, D.H., R.M. Wilson, and E.J. Reichmann, Group Sunspot Numbers: Sunspot cycle characteristics, Sol. Phys., 211 (1), 357–370, 2002. [NASA ADS]
• [11]Hoyt, D.V., and K.H. Schatten, Sunspot numbers: A new solar activity reconstruction, Sol. Phys., 179 (1), 189–219, 1998. [NASA ADS]
• [12]Karak, B.B., and A.R. Choudhuri, The Waldmeier effect and the flux transport solar dynamo, MNRAS, 410, 1503–1512, 2011.
• [13]Li, K.J., P.X. Gao, and T.W. Su, The Schwabe and Gleissberg Periods in the Wolf Sunspot Numbers and the Group Sunspot Numbers, Sol. Phys., 229 (1), 181–198, 2005.
• [14]Li, K.J., and H.F. Liang, Relationship between Group Sunspot Numbers and Wolf Sunspot Numbers, Astron. Nachr., 331 (7), 709–715, 2010.
• [15]Solanki, S.K., N.A. Krivova, M. Schüssler, and M. Fligge, Search for a relationship between solar cycle amplitude and length, Astron. Astrophys., 396, 1029–1035, 2002. [NASA ADS]
• [16]Svalgaard, L., Updating the historical sunspot record, in SOHO-23: Understanding a Peculiar Solar Minimum, eds.S.R., Cranmer, J.T. Hoeksema, and J.L. KohlASP Conference Series, 428, 297–306, 2010.
• [17]Vaquero, J.M., Historical sunspot observations: A review, Adv. Space Res., 40, 929–941, 2007. [NASA ADS]
• [18]Vaquero, J.M., and R.M. Trigo, Can the solar cycle amplitude be predicted using the preceding solar cycle length? Sol. Phys., 250 (1), 199–206, 2008.
• [19]Waldmeier, M., Die Zonenwanderung der Sonnenflecken, Astron. Mitt. Zürich, 14, 470–481, 1939.
• [20]Wilson, R.M., D.H. Hathaway, and E.J. Reichmann, An estimate for the size of cycle 23 based on near minimum conditions, J. Geophys. Res., 103 (A4), 6595–6603, 1998.