Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys
[1] Galactic cosmic ray flux at Earth is modulated by the heliospheric magnetic field. Heliospheric modulation potential, F, during grand solar minima is investigated using an open solar flux (OSF) model with OSF source based on sunspot number, R, and OSF loss on heliospheric current sheet inclinati...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.433.1552 2023-05-15T16:39:04+02:00 Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys M. J. Owens I. Usoskin M. Lockwood The Pennsylvania State University CiteSeerX Archives 1029 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.1552 http://www.leif.org/EOS/2012GL053151.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.1552 http://www.leif.org/EOS/2012GL053151.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.leif.org/EOS/2012GL053151.pdf text 1029 ftciteseerx 2016-01-08T04:47:29Z [1] Galactic cosmic ray flux at Earth is modulated by the heliospheric magnetic field. Heliospheric modulation potential, F, during grand solar minima is investigated using an open solar flux (OSF) model with OSF source based on sunspot number, R, and OSF loss on heliospheric current sheet inclination. Changing dominance between source and loss means F varies in- (anti-) phase with R during strong (weak) cycles, in agreement with F estimates from ice core records of 10 Be concentration, which are in-phase during most of the last 300 years, but anti-phase during the Maunder Minimum. Model results suggest “flat ” OSF cycles, such as solar cycle 20 result from OSF source and loss terms temporarily balancing throughout the cycle. Thus even if solar activity continues to decline steadily, the long-term drop in OSF through SC21 to SC23 may plateau during SC24, though reemerge in SC25 with the inverted phase relation. Text ice core Unknown |
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[1] Galactic cosmic ray flux at Earth is modulated by the heliospheric magnetic field. Heliospheric modulation potential, F, during grand solar minima is investigated using an open solar flux (OSF) model with OSF source based on sunspot number, R, and OSF loss on heliospheric current sheet inclination. Changing dominance between source and loss means F varies in- (anti-) phase with R during strong (weak) cycles, in agreement with F estimates from ice core records of 10 Be concentration, which are in-phase during most of the last 300 years, but anti-phase during the Maunder Minimum. Model results suggest “flat ” OSF cycles, such as solar cycle 20 result from OSF source and loss terms temporarily balancing throughout the cycle. Thus even if solar activity continues to decline steadily, the long-term drop in OSF through SC21 to SC23 may plateau during SC24, though reemerge in SC25 with the inverted phase relation. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
M. J. Owens I. Usoskin M. Lockwood |
spellingShingle |
M. J. Owens I. Usoskin M. Lockwood Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys |
author_facet |
M. J. Owens I. Usoskin M. Lockwood |
author_sort |
M. J. Owens |
title |
Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys |
title_short |
Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys |
title_full |
Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys |
title_fullStr |
Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys |
title_full_unstemmed |
Heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, Geophys |
title_sort |
heliospheric modulation of galactic cosmic rays during grand solar minima: past and future variations, geophys |
publishDate |
1029 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.1552 http://www.leif.org/EOS/2012GL053151.pdf |
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ice core |
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ice core |
op_source |
http://www.leif.org/EOS/2012GL053151.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.1552 http://www.leif.org/EOS/2012GL053151.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766029408617889792 |