Cyclicity of solar activity during the Maunder minimum deduced from radiocarbon content
Cyclicity of solar activity during the Maunder minimum deduced from radiocarbon content
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DOI：
10.1007/s11207-005-6501-5
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发表时间：
2004-10-01
期刊：
影响因子：
2.8
通讯作者：
Nakamura, T
中科院分区：
文献类型：
--
作者：
Miyahara, H;Masuda, K;Nakamura, T
本文介绍了在被称为蒙德极小期的延长的太阳黑子极小期（1645-1715 AD）期间，放射性碳含量的“十一年”周期的特征。太阳在蒙德极小期是否仍保持着周期性的极性反转一直是一个有争议的话题。尽管人们已经用宇宙成因同位素或计算方法研究了旋回性的持久性，但至今还没有得到一致的描述。因此，我们获得了1631-1739年树木年轮中碳-14含量的新记录，并与以前的记录进行了比较。在碳-14含量的变化中检测到的13-15年和24-29年的周期似乎表明，太阳在这段时间内保持了周期性的极性反转，其周期比最近强烈的太阳活动周期稍长。我们的结果似乎支持了太阳活动强度与周期长度之间的反相关关系。
This paper presents the features of the "eleven-year" cycle of radiocarbon content during the period of prolonged sunspot minimum called the Maunder Minimum (1645-1715 AD). Whether or not the Sun had maintained the cyclic polarity reversal even during the Maunder Minimum has been a controversial topic for a long time. Although persistency of the cyclicity has been investigated by using cosmogenic isotopes or by calculations, a consistent description has not been obtained so far. Hence, we have obtained a new record of carbon-14 content in tree rings from 1631-1739 AD, and made a comparison with the record previously obtained. Periods of 13-15 and 24-29 years detected in the variation of carbon-14 content seem to be suggesting that the Sun had retained periodic polarity reversal during this prolonged minimum with slightly longer periodicity than that of recent intense solar activity. Our results seem to support the inverse correlation between the intensity and the cycle length of solar activity.