Ukrainian Antarctic Journal

No 13 (2014): Ukrainian Antarctic Journal
Articles

Geomagnetic solar-diurnal variations at the Antarcticа, the relationship with solar activity

O. I. Maksimenko
Institute of Geophysics by S.I. Subbotin name of National Academy of Science of Ukraine, Kyiv
O. Ya Shenderovska
Institute of Geophysics of National Academy of Science of Ukraine, Kyiv
Published December 17, 2014
Keywords
  • Sq-variations of the geomagnetic field,
  • solar activity indices,
  • the regression coefficients
How to Cite
Maksimenko, O. I., & Shenderovska, O. Y. (2014). Geomagnetic solar-diurnal variations at the Antarcticа, the relationship with solar activity. Ukrainian Antarctic Journal, (13), 67-74. https://doi.org/10.33275/1727-7485.13.2014.212

Abstract

According to the monitoring of variations of the geomagnetic field over the period 1958-1991, Sq-variation  amplitudes of horizontal and vertical components of the magnetic field  depending  of  the index  F10.7 have been studied at the Ukrainian Antarctic station 'AIA' . Against the background of the high correlation r (Sq; F10.7) = 0,72-0,92 using regression analysis to determine the increase of inclination ('a') of the regression line in the summer and on the growth phase of the solar cycle, annual (summer and winter) fluctuations ('b') daily amplitude of Sq-variations upon minimal F10.7. It was found that the ratio 'a / b' for Z, Y component of the field is not constant, as is customary in the spherical harmonic model Sq (CM4), and in addition shows emissions in some months and the change of sign in the winter. Diagrams of annual changes monthly empirical values of diurnal amplitudes SqY, SqZ variations and index F10.7, are reflecting their similarity in the years of maximum CA and a cyclic characteristics during 33 years on the AIA.

References

  1. Maksimenko, O.I., Baxmutov, V.G., Kilifarska, N., & Shenderovskaya, O.Ya. (2013). Trendovy`e izmeneniya geomagnitnogo polya na observatorii «Argentinskie ostrova»: e`ffekt v Sq-variaciyax [Trending changes in the geomagnetic field at the observatory of Argentine Islands: the effect in Sq variations]. Ukrainian Antarctic Journal, 12, 62–68.
  2. Hibberd, F.H. (1985). The geomagnetic Sq variation – Annual, semi-annual and solar cycle variations and ring current effects. J. Atmos.Terr. Phys., 47, 341–352.
  3. Macmillan, S., & Droujinina, A. (2007). Long-term trends in geomagnetic daily variation. Earth Planets Space, 59, 391–395.
  4. Penquerc’h, V., & Hole, R. (2011). Modelling the Sq field with satellite data: Towards the Swarm mission. Holme University of Liverpool NCEO meeting, University of Warwick, 5th-8th September 2011.
  5. Sabaka, T.J., Olsen, N., & Purucker, M.E. (2004). Extending comprehensive models of the Earth’s magnetic field. Geophysical Journal International, 159, 521–547.
  6. Stening, R.J. (2008). The shape of the Sq current system. Annales Geophysicae, 26, 1767–1775.
  7. Takeda, M., Iyemori, T., & Saito, A. (2003). Relationship between electric field and currents in the ionosphere and geomagnetic Sq field. Journal of Geophysical Research, 108(A5), 1183.
  8. Takeda, M. (2013). Contribution of wind, conductivity, and geomagnetic main field to the variation in the geomagnetic Sq field. Journal of Geophysical Research: Space Physics, 118(7), 4516–4522.
  9. Torta, J., Marsal, S., Curto, J.J. et al. (2010). Behaviour of the quiet-day geomagnetic variation at Livingston Island and variability of the Sq focus position in the South American-Antarctic Peninsula region. Earth Planets Space, 62, 297–307.
  10. Yamazaki, Y., Yumoto, K., Cardinal, M. et al. (2011). An empirical model of the quiet daily geomagnetic field variation. Journal of Geophysical Research, 116(A10).
  11. Yamazaki, Y., Richmond, A.D., Liu, H., et al. (2012). Sq current system during stratospheric sudden warming events in 2006 and 2009. Journal of Geophysical Research, 117, A12313.