Galactic Cosmic Ray Fluctuations: Long-Term Modulation of Power Spectrum

Details Galactic Cosmic Ray Fluctuations: Long-Term Modulation of Power Spectrum Galactic Cosmic Ray Fluctuations: Long-Term Modulation of Power Spectrum

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.3905s&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

In the present paper we study the time evolution of power spectra of galactic cosmic ray fluctuations during the last three solar cycles (1968-2002) using data of 5-min count rates from two far spaced high-latitude neutron monitors, Tixie Bay (Russia) and Oulu (Finland). We have shown that the power spectrum of cosmic ray fluctuations is a sub ject of a regular long-term periodic 11-year modulation in phase with solar activity, in accordance with variations of the inertial part of the interplanetary magnetic field turbulence power spectrum. These results present a new kind of modulation of cosmic ray intensities.

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