Variation of solar activity from the Spoerer to the Maunder minima indicated by radiocarbon content in tree-rings
Variation of solar activity from the Spoerer to the Maunder minima indicated by radiocarbon content in tree-rings
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DOI：
10.1016/j.asr.2006.12.044
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发表时间：
2007-01-01
影响因子：
2.6
通讯作者：
Nakamura, Toshio
中科院分区：
文献类型：
--
作者：
Miyahara, Hiroko;Masuda, Kimiaki;Nakamura, Toshio
本文介绍了我们对日本雪松中放射性碳含量的测量结果，时间为公元1557-1629年，即两个太阳活动极小期（称为Spoerer极小期和Maunder极小期）的间隔。我们测量了Spoerer极小期和Maunder极小期周围的放射性碳含量，旨在阐明延长的太阳黑子极小期期间11年太阳周期的特征。从日本雪松中获得的放射性碳含量的时间序列现在可以从公元1413年到公元1745年获得。对Spoerer极小期和Maunder极小期的放射性碳数据进行的频率分析表明，即使在长期没有太阳黑子的时期，太阳也会继续发生周期性变化，“11年”太阳活动周期的实际长度可能会随着太阳活动水平在百年时间尺度上的长期变化而改变。本文分析了两个太阳极小期之间的放射性碳含量变化，并与Spoerer极小期和Maunder极小期的变化进行了比较。(C)2007年空间研委会。由爱思唯尔有限公司出版。保留所有权利。
This paper presents the results of our measurements of radiocarbon content in Japanese cedar trees for 1557-1629 AD, the interval of two grand solar minima called the Spoerer and the Maunder minima. We had measured the radiocarbon content around the Spoerer and the Maunder minima, aiming to clarify the characteristics of the 11-year solar cycle during prolonged sunspot minima. The time series of radiocarbon content obtained from Japanese cedar is now available 1413 AD through 1745 AD. Frequency analyses of the radiocarbon data for the Spoerer and the Maunder minima show that the Sun continues periodic variations even during periods of long-lasting sunspot absence, and that the actual length of the "11-year" solar cycle could be changed in association with long-term variations of the solar-activity level with centennial time scale. in this paper, we analyze the variation of radiocarbon content during the interval between the two grand solar minima and compare with that during the Spoerer and the Maunder minima. (C) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.