Long term trends in semi-diurnal anisotropy and effect of solar poloidal magnetic field inversion

Details Long term trends in semi-diurnal anisotropy and effect of solar poloidal magnetic field inversion Long term trends in semi-diurnal anisotropy and effect of solar poloidal magnetic field inversion

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3819s&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

The long term trend and effect of the reversal of polarity of Solar poloidal magnetic field (SPMF) on semidiurnal anisotropy of cosmic ray (CR) intensity on quiet days for the period 1964-95, covering three solar cycles namely 20,21 and 22 have been studied using Deep River neutron monitor data. Semi-diurnal anisotropy shows sudden changes to early/later hours near to CR intensity minima or maxima. The amplitude of semi-diurnal anisotropy shows an increase followed by decrease during inversion of solar poloidal magnetic field (SPMF). The average vectors for negative polarity of SPMF in northern hemisphere (NH) during 1964-70 and 1980-90 are shifted to later hours relative to the average vectors for the entire period of observation.

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