1. 32nd International Cosmic Ray Conference, 2011
Heliospheric modulation of cosmic rays in the 23rd cycle and in previous cycles
Gerasimova S.K., Gololobov P.Yu., Krivoshapkin P.A., Krymsky G.F., Starodubtsev S.A.
Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy
Siberian Branch of Russian Academy of Sciences, Yakutsk, Russia
Contact

2. INTRODUCTION
Long-term variations of the cosmic ray flux I by data of stratospheric measurements from st. Murmansk(Rc=0,6 GeV) and st. Moscow(Rc=2,4 GeV). And also the expected variations at these stations at k0=5.

3. IDEALIZED MODEL OF SOLAR CYCLE
Transport equation
Diffusion tensor
Degree of magnetic field regularity
Krymsky G.F., Krivoshapkin P.A., Mamrukova V.P.,et al., Journal of Experimental and Theoretical Physics, 2007, 104 (2):

4. IDEALIZED MODEL OF SOLAR CYCLE
Krymsky G.F., Krivoshapkin P.A., Mamrukova V.P.,et al., Journal of Experimental and Theoretical Physics, 2007, 104 (2):

5. IDEALIZED MODEL OF SOLAR CYCLE
Long-term variations of the cosmic ray flux I by data of stratospheric measurements from st. Murmansk(Rc=0,6 GeV) and st. Moscow(Rc=2,4 GeV). And also the expected variations at these stations at k0=5.

6. ANOMALY OF THE 23rd CYCLE
Temporal change of the IMF intensity (a), level of the IMF turbulence (b)

7. ANOMALY OF THE 23rd CYCLE
Temporal change of the number of solar spots Rz 9(a), index of Forbush-effects spectrum by data of muon telescopes of the Yakutsk spectrograph (b); index of Forbush-effects spectrum by data of the neutron monitor network (c).

8. ANOMALY OF THE 23rd CYCLE
Stations
1965
2010
Observations, sm-2s-1
Theory, k0=5,
sm-2s-1
Observations,
Theory, k0=15,
Murmansk
3.37
3.95
3.84
Moscow
2.76
2.82
3.11
3.08
Intensity of cosmic rays at Murmansk and Moscow during the period of solar activity minimum.

9. ANOMALY OF THE 23rd CYCLE
Temporal change of cosmic ray flux I by data of stratospheric measurements in stations at Murmansk (0,6 GeV) and at Moscow (2,4 GeV) in the 21st (a) and 23rd (b) solar activity cycles

10. CONCLUSIONS
Observations of cosmic rays are in agreement with the elementary theory of heliospheric modulation. The abnormal increase of cosmic rays at the 23rd cycle is caused by the decreased turbulence of interplanetary magnetic field.

11. In conclusions, the authors express gratitude for providing the stratospheric data of Moscow and Murmansk stations to
Prof. Yu. I. Stozkhov et. al.

12. Thank you for attention!