Assessment of different sunspot number series using the cosmogenic isotope 44 Ti in meteorites
Assessment of different sunspot number series using the cosmogenic isotope 44 Ti in meteorites
复制标题
使用陨石中宇宙成因同位素 44 Ti 评估不同太阳黑子数系列
DOI:
10.1093/mnras/stx190
复制
发表时间:
2017
影响因子:
4.8
通讯作者:
Asvestari E
中科院分区:
文献类型:
--
作者:
Asvestari E
Many sunspot number series exist suggesting different levels of solar activity during the past centuries. Their reliability can be assessed only by comparing them with alternative indirect proxies. We test different sunspot number series against the updated record of cosmogenic radionuclide44Ti measured in meteorites. Two bounding scenarios of solar activity changes have been considered: the HH-scenario (based on the series by Svalgaard and Schatten), in particular, predicting moderate activity during the Maunder minimum, and the LL-scenario (based on the RGseries by Lockwood et al.) predicting moderate activity for the 18th–19th centuries and the very low activity level for the Maunder minimum. For each scenario, the magnetic open solar flux, the heliospheric modulation potential and the expected production of44Ti were computed. The calculated production rates were compared with the corresponding measurements of44Ti activity in stony meteorites fallen since 1766. The analysis reveals that the LL-scenario is fully consistent with the measured44Ti data, in particular, recovering the observed secular trend between the 17th century and the Modern grand maximum. On the contrary, the HH-scenario appears significantly inconsistent with the data, mostly due to the moderate level of activity during the Maunder minimum. It is concluded that the HH-scenario sunspot number reconstruction significantly overestimates solar activity prior to the mid-18th century, especially during the Maunder minimum. The exact level of solar activity after 1750 cannot be distinguished with this method, since both H- and L- scenarios appear statistically consistent with the data.
登录
查看更多内容
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Mathew J. Owens;E. Cliver;K. McCracken;J. Beer;L. Barnard;Mike Lockwood;A. Rouillard;Dário Passos;Pete Riley;Ilya Usoskin;Y.
通讯作者:
Y.
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
M. Lockwood;M. Owens;L. Barnard
通讯作者:
L. Barnard
DOI:
--
发表时间:
1980
期刊:
Radiocarbon: An International Journal of Cosmogenic Isotope Research
影响因子:
--
作者:
G. Castagnoli;D. Lal
通讯作者:
D. Lal
影响因子:
2.6
作者:
F. Clette;D. Berghmans;P. Vanlommel;R. V. D. Linden;A. Koeckelenbergh;L. Wauters
通讯作者:
F. Clette;D. Berghmans;P. Vanlommel;R. V. D. Linden;A. Koeckelenbergh;L. Wauters
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
C. Taricco;N. Bhandari;P. Colombetti;N. Verma
通讯作者:
N. Verma