Correlation of the quasi-biennial oscillations in galactic cosmic rays and in the solar activity indices

24th European Cosmic Ray Symposium

Bazilevskaya, G.A.^1 ; Kalinin, M.S.^1 ; Krainev, M.B.^1 ; Makhmutov, V.S.^1 ; Stozhkov, Y.I.^1 ; Svirzhevskaya, A.K.^1 ; Svirzhevsky, N.S.^1

Lebedev Physical Institute, Russian Academy of Sciences, Leninsky prospect, 53, Moscow

119991, Russia^1

关键词: Cosmic ray intensity;    Galactic cosmic rays;    Geomagnetic disturbance;    Gnevyshev gap effect;    Heliospheric magnetic fields;    Negative correlation;    Quasi-biennial oscillation;    Solar activity index;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/632/1/012050/pdf
DOI  :  10.1088/1742-6596/632/1/012050

来源: IOP

【 摘 要 】

Quasi-biennial oscillation (QBO) is a well-known variation in solar activity, interplanetary parameters, geomagnetic disturbances and cosmic rays. Solar QBO is translated to the space via open magnetic flux and modulates intensity of cosmic rays. The highest negative correlation exists in the QBO of cosmic rays with QBO in the heliospheric magnetic field strength B as well as with QBO in the scalar product BV, where V is the solar wind velocity, cosmic ray being delayed by ≈ 1 month. During ≈ 50 years of cosmic ray monitoring the QBO periods demonstrated some intermittency. It is argued that the Gnevyshev Gap effect and the step-like changes in the cosmic ray intensity appeared to be a part of QBO in cosmic rays.