HR: 0800h
AN: SH31A-1179    [Abstracts]
TI: Solar Cycle During the Maunder Minimum
AU: * Miyahara, H
EM: miyahara@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Furo-cho, Chikusa-ku, Shinike-cho, Nagoya, 464-8601 Japan
AU: Masuda, K
EM: kmasuda@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Furo-cho, Chikusa-ku, Shinike-cho, Nagoya, 464-8601 Japan
AU: Muraki, Y
EM: muraki@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Furo-cho, Chikusa-ku, Shinike-cho, Nagoya, 464-8601 Japan
AB: 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.
DE: 7536 Solar activity cycle (2162)
DE: 2104 Cosmic rays
DE: 2134 Interplanetary magnetic fields
DE: 2162 Solar cycle variations (7536)
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting