Reconstruction of solar activity for the last millennium using $^{10}$Be data
In a recent paper (Usoskin et al., 2002a), we have reconstructed the concentration of the cosmogenic $^{10}$Be isotope in ice cores from the measured sunspot numbers by using physical models for $^{10}$Be production in the Earth's atmosphere, cosmic ray transport in the heliosphere, and evoluti...
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ftcern:oai:cds.cern.ch:644084 2023-05-15T13:56:27+02:00 Reconstruction of solar activity for the last millennium using $^{10}$Be data Usoskin, I G Mursula, K Solanki, S K Schüssler, M Alanko, K 2003-09-20 http://cds.cern.ch/record/644084 eng eng http://cds.cern.ch/record/644084 astro-ph/0309556 oai:cds.cern.ch:644084 Astrophysics and Astronomy 2003 ftcern 2018-07-28T06:08:41Z In a recent paper (Usoskin et al., 2002a), we have reconstructed the concentration of the cosmogenic $^{10}$Be isotope in ice cores from the measured sunspot numbers by using physical models for $^{10}$Be production in the Earth's atmosphere, cosmic ray transport in the heliosphere, and evolution of the Sun's open magnetic flux. Here we take the opposite route: starting from the $^{10}$Be concentration measured in ice cores from Antarctica and Greenland, we invert the models in order to reconstruct the 11-year averaged sunspot numbers since 850 AD. The inversion method is validated by comparing the reconstructed sunspot numbers with the directly observed sunspot record since 1610. The reconstructed sunspot record exhibits a prominent period of about 600 years, in agreement with earlier observations based on cosmogenic isotopes. Also, there is evidence for the century scale Gleissberg cycle and a number of shorter quasi-periodicities whose periods seem to fluctuate in the millennium time scale. This invalidates the earlier extrapolation of multi-harmonic representation of sunspot activity over extended time intervals. Other/Unknown Material Antarc* Antarctica Greenland CERN Document Server (CDS) Greenland |
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CERN Document Server (CDS) |
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English |
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Astrophysics and Astronomy |
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Astrophysics and Astronomy Usoskin, I G Mursula, K Solanki, S K Schüssler, M Alanko, K Reconstruction of solar activity for the last millennium using $^{10}$Be data |
topic_facet |
Astrophysics and Astronomy |
description |
In a recent paper (Usoskin et al., 2002a), we have reconstructed the concentration of the cosmogenic $^{10}$Be isotope in ice cores from the measured sunspot numbers by using physical models for $^{10}$Be production in the Earth's atmosphere, cosmic ray transport in the heliosphere, and evolution of the Sun's open magnetic flux. Here we take the opposite route: starting from the $^{10}$Be concentration measured in ice cores from Antarctica and Greenland, we invert the models in order to reconstruct the 11-year averaged sunspot numbers since 850 AD. The inversion method is validated by comparing the reconstructed sunspot numbers with the directly observed sunspot record since 1610. The reconstructed sunspot record exhibits a prominent period of about 600 years, in agreement with earlier observations based on cosmogenic isotopes. Also, there is evidence for the century scale Gleissberg cycle and a number of shorter quasi-periodicities whose periods seem to fluctuate in the millennium time scale. This invalidates the earlier extrapolation of multi-harmonic representation of sunspot activity over extended time intervals. |
author |
Usoskin, I G Mursula, K Solanki, S K Schüssler, M Alanko, K |
author_facet |
Usoskin, I G Mursula, K Solanki, S K Schüssler, M Alanko, K |
author_sort |
Usoskin, I G |
title |
Reconstruction of solar activity for the last millennium using $^{10}$Be data |
title_short |
Reconstruction of solar activity for the last millennium using $^{10}$Be data |
title_full |
Reconstruction of solar activity for the last millennium using $^{10}$Be data |
title_fullStr |
Reconstruction of solar activity for the last millennium using $^{10}$Be data |
title_full_unstemmed |
Reconstruction of solar activity for the last millennium using $^{10}$Be data |
title_sort |
reconstruction of solar activity for the last millennium using $^{10}$be data |
publishDate |
2003 |
url |
http://cds.cern.ch/record/644084 |
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Greenland |
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Greenland |
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Antarc* Antarctica Greenland |
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Antarc* Antarctica Greenland |
op_relation |
http://cds.cern.ch/record/644084 astro-ph/0309556 oai:cds.cern.ch:644084 |
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1766263965519708160 |