Solar Cycle During the Maunder Minimum
Abstract
Cyclicity of solar activity during the Maunder Minimum (1645-1715 AD) has been investigated by using the records of radiocarbon content in annual tree-rings. The spectral analysis of the records have shown a weak peak around fourteen years, suggesting that the length of the ``eleven-year'' cycle had been stretched and that there had been only five ``eleven-year'' cycles during this period. We also report possible features of polarity reversal of the Sun during this period.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2004
- Bibcode:
- 2004AGUFMSH31A1179M
- Keywords:
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- 7536 Solar activity cycle (2162);
- 2104 Cosmic rays;
- 2134 Interplanetary magnetic fields;
- 2162 Solar cycle variations (7536)