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Long-Term Variations of the Solar Supergranulation Size According to the Observations in CaIIK Line

  • A. G. Tlatov
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP, volume 30)

Abstract

This work contains analysis of distinctive size of chromospheric cells Kodaikanal (1907–1999) and Medon (1983–2010). At first the contrast of chromospheric grid was enlarged on image, by means of subtraction of the gradient from the solar disc intensity. This analysis was performed with the help of balanced wavelet transformation. It was discovered that distinctive size of chromospheric cells is close to 36Mm but it has variations,in the phase of solar activity ∼1, 2Mm maximal size of the cell can be seen as a rule, in ∼1, 5 year after maximum of the solar activity. There is a positive correlation (R = 0, 83) between the size of the chromospheric cells in maximum and the amplitude of the following activity cycle. Thus, the size of the supergranulation is connected with the solar activity and is ahead of it ∼8, 8 of a year.

Keywords

Solar Activity Activity Cycle Solar Disc Central Meridian Maximal Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The work was supported by Russian Foundation for Basic Research and Russian Academy of Sciences.

References

  1. 1.
    Priest E. R.: Solar magneto-hydrodynamics. D. Reidel Publishing company, Dordrecht, Boston (1984)Google Scholar
  2. 2.
    Hart, A. B.:Motions in the Sun at the photospheric level. VI. Large-scale motions in the equatorial region. MNRAS 116, 38, (1956)Google Scholar
  3. 3.
    Leighton, R.B., Noyes, R.W., Simon, G.W.: Velocity Fields in the Solar Atmosphere. I. Preliminary Report, Astrophysical Journal, 135, 474 (1962)Google Scholar
  4. 4.
    November, L. J., Toomre, J., Gebbie, K. B., Simon, G. W.: The detection of mesogranulation on the sun, Astrophysical Journal Letters, 245, 123–126 (1981)Google Scholar
  5. 5.
    Simon, G. W.; Weiss, N. O.: Supergranules and the Hydrogen Convection Zone, Z. Astrophys., 69, 435 (1968)Google Scholar
  6. 6.
    Hathaway, D. H.; Beck, J. G.; Bogart, R. S.; Bachmann, K. T.; Khatri, G.; Petitto, J. M.; Han, S.; Raymond, J.: The Photospheric Convection Spectrum, Solar Physics, 193, 299–312 (2000)Google Scholar
  7. 7.
    Williams, P. E.; Pesnell, W. D.: Comparisons of Supergranule Characteristics During the Solar Minima of Cycles 22/23 and 23/24, Solar Physics, 270, 125–136 (2011)Google Scholar
  8. 8.
    Hagenaar, H. J., Schrijver, C. J., Title, A. M.: The Distribution of Cell Sizes of the Solar Chromospheric Network, Astrophysical Journal, 481, 988 (1997)Google Scholar
  9. 9.
    Rieutord, M., Rincon, F.: The Sun’s Supergranulation, Living Reviews in Solar Physics, 7 (2010)Google Scholar
  10. 10.
    McIntosh, S. W., Leamon, R. J., Hock, R. A., Rast, M. P.; Ulrich, R. K.: Observing Evolution in the Supergranular Network Length Scale During Periods of Low Solar Activity, Astrophysical Journal Letters, 730, L3 (2011)Google Scholar
  11. 11.
    DeRosa, M.L., Toomre, J.: Evolution of Solar Supergranulation, Astrophys. J., 616, 1242–1260 (2004)Google Scholar
  12. 12.
    Meunier N., Rieutord, M.: Supergranules over the solar cycle, Astron. Astrophys., 488, 1109–1115 (2008)Google Scholar
  13. 13.
    Meunier, N., Roudier, T., Tkaczuk, R.: Are supergranule sizes anti-correlated with magnetic activity?, Astron. Astrophys., 466, 1123–1130 (2007)Google Scholar
  14. 14.
    Tlatov, A.G., Pevtsov, A.A. , Singh, J.: A New Method of Calibration of Photographic Plates from Three Historic Data Sets, Solar Phys. 255, 239–251 (2009)Google Scholar
  15. 15.
    Canny, J.: A Computational Approach To Edge Detection, IEEE Trans. Pattern Analysis and Machine Intelligence, 8, 679–698 (1986)Google Scholar
  16. 16.
    Rieutord, M., Roudier, T., Rincon, F., Malherbe, J.-M., Meunier, N., Berger, T. and Frank, Z.: On the power spectrum of solar surface flows, Astron. Astrophys., 512, A4 (2010)Google Scholar
  17. 17.
    Simon, G. W.; Leighton, R. B.: Velocity Fields in the Solar Atmosphere. III. Large-Scale Motions, the Chromospheric Network, and Magnetic Fields, Astrophys. J. 140, 1120, (1964)Google Scholar
  18. 18.
    Foster G.: Wavelets for period analysis of unevenly samples time series. Astronomical Journal, 112, 1709–1729 (1996)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Kislovodsk mountian astronomical station of the Pulkovo observatoryKislovodskRussia

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