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Article . 2015 . Peer-reviewed
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Frontiers in Astronomy and Space Sciences
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Deciphering solar magnetic activity: on grand minima in solar activity

Authors: McIntosh, Scott W.; Leamon, Robert J.;

Deciphering solar magnetic activity: on grand minima in solar activity

Abstract

The Sun provides the energy necessary to sustain our existence. While the Sun provides for us, it is also capable of taking away. The weather and climatic scales of solar evolution and the Sun-Earth connection are not well understood. There has been tremendous progress in the century since the discovery of solar magnetism - magnetism that ultimately drives the electromagnetic, particulate and eruptive forcing of our planetary system. There is contemporary evidence of a decrease in solar magnetism, perhaps even indicators of a significant downward trend, over recent decades. Are we entering a minimum in solar activity that is deeper and longer than a typical solar minimum, a "grand minimum"? How could we tell if we are? What is a grand minimum and how does the Sun recover? These are very pertinent questions for modern civilization. In this paper we present a hypothetical demonstration of entry and exit from grand minimum conditions based on a recent analysis of solar features over the past 20 years and their possible connection to the origins of the 11(-ish) year solar activity cycle.

9 pages - submitted to Frontiers in Solar and Stellar Physics

Keywords

Activity Cycles, QC801-809, Astronomy, solar interior, Geophysics. Cosmic physics, activity cycles, FOS: Physical sciences, QB1-991, helioseismology, magnetic fields, Magnetic Fields, Astrophysics - Solar and Stellar Astrophysics, dynamo theory, Astronomy and Space Sciences, Solar interior, Solar and Stellar Astrophysics (astro-ph.SR)

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Average
Average
Average
Green
gold