12-20 July 2017
BEXCO
Asia/Seoul timezone
Home > Timetable > Session details > Contribution details

Contribution

BEXCO - Room F(201/202/203/204)

[SH049] Recurrent changes of the galactic cosmic rays intensity and solar dynamo

Speakers

  • Agnieszka GIL

Primary authors

  • Agnieszka GIL (Institute of Mathematics and Physics, Siedlce University, Poland)

Co-authors

  • Michael ALANIA (Institute of Mathematics and Physics, Siedlce University, Poland; Institute of Geophysics, Tbilisi State University, Georgia)

Description

We recognized in amplitudes of the 27-day variation of the galactic cosmic rays intensity, as well as in solar activity (SA) parameters and solar wind (SW) properties appears quasi-recurrence with duration of 3 to 4 Carrington rotations period (3-4 CRP). We attribute this phenomenon to the presence of a spatial topological structure (STS) of the magnetic field lines. The STS is created by the α–ω effect changing from one solar rotation to the next in the inner solar atmosphere, from photosphere to lower corona. Spatial topological structure exists due to the asymmetry of turbulent solar dynamo and solar differential rotation transforming the solar poloidal magnetic field to the toroidal (α–ω effect), and vice versa. Studying this phenomenon by the aid of spectral and wavelet analysis methods we found an existence of the quasi-periodicities with duration shorter than, and longer than the 3-4 CRP. This quasi-periodicity, 3-4 CRP, corresponds to the extreme interval dt of differential rotation periods, dt = 35 days -25 days (from poles to equator, respectively) of the Sun. However, we also assume that the α–ω process appears in time intervals corresponding to the transitional differential rotation periods, as well, e.g. dt1 = 26 days -25 days, dt2 = 27 days - 25 days, and so forth, to dt = 35 days -25 days. Thus, we assume that extensive range of quasi- periodicities of GCR intensity, SW and SA parameters can be related to the combined influence of turbulent solar dynamo and solar differential rotation being a cause of the STS formation. Thus, the STS should be very complex pattern containing a broad modes of oscillations responsible for various types of quasi-periodicities. So, We believe that we are very close to find an evidence for the statement that any alternation - periodical or non periodical in the GCR intensity and in parameters of solar activities and solar wind is strongly related with temporal changes of the various scales of STS.