For how long will the current grand maximum of solar activity persist?
For how long will the current grand maximum of solar activity persist?
复制标题
目前太阳活动最盛期会持续多久?
DOI:
10.1029/2008gl035442
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发表时间:
2008
影响因子:
5.2
通讯作者:
Abreu J
中科院分区:
文献类型:
--
作者:
Abreu J
Understanding the Sun's magnetic activity is important because of its impact on the Earth's environment. The sunspot record since 1610 shows irregular 11‐year cycles of activity; they are modulated on longer timescales and were interrupted by the Maunder minimum in the 17th century. Future behavior cannot easily be predicted – even in the short‐term. Recent activity has been abnormally high for at least 8 cycles: is this grand maximum likely to terminate soon or even to be followed by another (Maunder‐like) grand minimum? To answer these questions we use, as a measure of the Sun's open magnetic field, a composite record of the solar modulation function Φ, reconstructed principally from the proxy record of cosmogenic10Be abundances in the GRIP icecore from Greenland. This Φ record extends back for almost 10,000 years, showing many grand maxima and grand minima (defined as intervals when Φ is within the top or bottom 20% of a Gaussian distribution). We carry out a statistical analysis of this record and calculate the life expectancy of the current grand maximum. We find that it is only expected to last for a further 15–36 years, with the more reliable methods yielding shorter expectancies, and we therefore predict a decline in solar activity within the next two or three cycles. We are not able, however, to predict the level of the ensuing minimum.
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DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
S. Tobias;N. Weiss
通讯作者:
N. Weiss
影响因子:
--
作者:
K. Mccracken;F. Mcdonald;J. Beer;G. Raisbeck;F. Yiou
通讯作者:
K. Mccracken;F. Mcdonald;J. Beer;G. Raisbeck;F. Yiou
DOI:
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发表时间:
1988
期刊:
影响因子:
--
作者:
M. Stuiver;T. Braziunas
通讯作者:
T. Braziunas
DOI:
10.1086/516628
发表时间:
2007-04
期刊:
The Astrophysical Journal
影响因子:
--
作者:
P. Bushby;S. Tobias
通讯作者:
P. Bushby;S. Tobias
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
J. Ribes;E. Nesme
通讯作者:
E. Nesme