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Manifestation of the Jupiter's synodic period in the solar wind, interplanetary magnetic field and geophysical parameters

  • S. N. Samsonov (a1) and N. G. Skryabin (a1)

Abstract

Studying by the authors of paper of solar wind parameters, namely: density, speed and temperature and also a module of interplanetary magnetic field (IMF) intensity has allowed to find out in them fluctuations with the period of 399 days. From references it is known that this period coincidence with the synodic period of Jupiter. So long as close by the given period another source of such fluctuations is not known we have assumed that fluctuations with the period of 399 days are fluctuations with the synodic period of Jupiter. The change of the solar wind plasma parameters and IMF intensity can lead to the change of the Earth's magnetic field parameters and, as a consequence, to the change of charged particle fluxes in the Earth's magnetosphere. On this assumption the IMF intensity in the Earth's vicinity, geomagnetic disturbance (Kp-index) and riometer absorption for the years of 1986-1996 have been analyzed. The analysis of the data has shown the presence of certain changes of these physical parameters with the period of 399 days. When the Earth and Jupiter were found to be on the same magnetic field line, the IMF intensity was decreasing up to 3.0±0.57, the geomagnetic activity and riometer absorption were decreasing up to 5.2±1.46% and 9.4±2.63%, respectively.

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References

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Ferreira, S. E. S., Potgieter, M. S., Burger, R. A., Heber, B., Fichtner, H., & Lopate, C. 2001, Geophys. Res., 106, 29313
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Skryabin, N. G., Bezrodnykh, I. P., Plotnikov, I. Ya., & Ivanov, O. P. 2001, Geomagnetism and Aeronomy, 41, 432
Skryabin, N. G., Timofeev, V. E., Miroshnichenko, L. I., & Samsonov, S.N. 2005, Astronomy Letters, 31, 832
Sokolov, V. D., Samsonov, S. N., Ivanov, O. P., Yarygin, L. S., Vasil'ev, N. I., & Filippovich, V. N. 1988, Observations of artificial celestial bodies (in Russian), 84, 206
Timofeev, V. E., Miroshnichenko, L. I., Samsonov, S. N., & Skryabin, N. G. 2007, Astronomy Letters, 33, 63
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