Abstract
A detailed correlative analysis between sunspot numbers (SSN) and tilt angle (TA) with cosmic ray intensity (CRI) in the neutron monitor energy range has been performed for the solar cycles 21, 22 and 23. It is found that solar activity parameters (SSN and TA) are highly (positive) correlated with each other and have inverse correlation with cosmic ray intensity (CRI). The ‘running cross correlation coefficient’ between cosmic ray intensity and tilt angle has also been calculated and it is found that the correlation is positive during the maxima of odd cycles 21 and 23. Moreover, the time lag analysis between CRI and SSN, and between CRI and TA has also been performed and is supported by hysteresis curves, which are wide for odd cycles and narrow for even cycles.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ahluwalia, H. S. 1992,Planetary Space Sci.,40, 1227.
Burlaga, L. F., McDonald, F. B., Ness, N. F., Schwenn, R., Lazarus, A. J., Mariani, F. 1984,J. Geophys. Res.,89, 6579.
Belov, A. V. 2000,Space Sci. Rev.,93, 79.
Belov, A. V., Gushchina,R. T., Obridko, V. N., Shelting, B. D., Yanke, V. G. 2002,Geomagnetism and Aeronomy,42, 639.
Cliver, E. W. 1993,J. Geophys. Res.,98, 17435.
Cliver, E. W., Boriakoff, V., Bounar, K. H. 1996,J. Geophys. Res.,101, 27091.
Cliver, E. W., Ling, A. G. 2001,Astrophys. J.,551, 189.
Forbush, S. E. 1954,J. Geophys. Res.,59, 525.
Forbush, S. E. 1958,J. Geophys. Res.,63, 651.
Iskra, K., Wybraniec, B. 2001, 27thICRC, Hamburg,9, 3807.
Jokipii, J. R., Levy, E. H., Hubbard, W. B. 1977,Astrophys. J.,213, 861.
Jokipii, J. R., Thomas, B. T. 1981,Astrophys. J.,243, 1115.
Mishra, V. K., Tiwari, D. P. 2003,Indian J. Radio and Space Phys.,32, 65.
Potgieter, M. S. 1998,Space Sci. Rev.,83, 147.
Smith, E. J. 1990,J. Geophys. Res.,95, 18731.
Suess, S. T., McComas, D. J., Hocksema, J. T. 1993,Geophys. Res. Lett.,20, 161.
Swinson, D. B., Yasue, S. I. 1992,J. Geophys. Res.,97, 19149.
Usoskin, I. G., Kananen, H., Mursula, K., Tanskanen, P., Kovaltsov, G. A. 1998,J. Geophys. Res.,103, 9567.
Usoskin, I. G., Kovaltsov, G. A., Mursula, K., Alkano, K. 2003,28th ICRC, Tsukuba, p. 3803.
Webber, W. R., Lockwood, J. A. 1988,J. Geophys. Res.,93, 8735.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gupta, M., Mishra, V.K. & Mishra, A.P. Long-term modulation of cosmic ray intensity in relation to sunspot numbers and tilt angle. J Astrophys Astron 27, 455–464 (2006). https://doi.org/10.1007/BF02709371
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02709371