A five‐year variability in the modulation of the galactic cosmic radiation over epochs of low solar activity
- 19 December 2002
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 29 (24) , 14-1-14-4
- https://doi.org/10.1029/2002gl015786
Abstract
Using cosmogenic 10Be data to study the period 1423–1980 AD, we identify a previously unrecognized 5 year modulation process that occurs during epochs of low solar activity. In this, the galactic cosmic radiation exhibits a maximum intensity near sunspot maximum, as well as the well‐known intensity maxima coincident with sunspot minimum. This demonstrates that the 5 year periodicity previously reported in the power spectra of 10Be and 14C data is not due to atmospheric processes, and allows their physical significance to be studied.This publication has 17 references indexed in Scilit:
- Role of a Variable Meridional Flow in the Secular Evolution of the Sun’s Polar Fields and Open FluxThe Astrophysical Journal, 2002
- The Behavior of the Open Magnetic Field of the SunThe Astrophysical Journal, 2001
- Solar cosmic ray events for the period 1561–1994: 1. Identification in polar ice, 1561–1950Journal of Geophysical Research, 2001
- Heliospheric modulation of cosmic rays and solar activity during the Maunder minimumJournal of Geophysical Research, 2001
- Solar modulation of cosmogenic nuclide production over the last millennium: comparison between 14C and 10Be recordsEarth and Planetary Science Letters, 1997
- Sun, ocean, climate and atmospheric 14CO2 : an evaluation of causal and spectral relationshipsThe Holocene, 1993
- The simulated features of heliospheric cosmic-ray modulation with a time-dependent drift model. I - General effects of the changing neutral sheet over the period 1985-1990The Astrophysical Journal, 1992
- Use of 10Be in polar ice to trace the 11-year cycle of solar activityNature, 1990
- Changes in Atmospheric Carbon-14 Attributed to a Variable SunScience, 1980
- Effects of particle drift on cosmic-ray transport. I - General properties, application to solar modulationThe Astrophysical Journal, 1977