Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/9399 |
Resumo: | We present two separate time series of the near-Earth heliospheric magnetic field strength (B) based on geomagnetic data and sunspot number (SSN). The geomagnetic-based B series from 1845 to 2013 is a weighted composite of two series that employ the interdiurnal variability index; this series is highly correlated with in situ spacecraft measurements of B (correlation coefficient, r=0.94; mean square error, MSE=0.16nT(2)). The SSN-based estimate of B, from 1750 to 2013, is a weighted composite of eight time series derived from two separate reconstruction methods applied to four different SSN time series, allowing determination of the uncertainty from both the underlying sunspot records and the B reconstruction methods. The SSN-based composite is highly correlated with direct spacecraft measurements of B and with the composite geomagnetic B time series from 1845 to 2013 (r=0.91; MSE=0.24nT(2)), demonstrating that B can accurately reconstructed by both geomagnetic and sunspot-based methods. The composite sunspot and geomagnetic B time series, with uncertainties, are provided as supporting information. |
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spelling |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructionsWe present two separate time series of the near-Earth heliospheric magnetic field strength (B) based on geomagnetic data and sunspot number (SSN). The geomagnetic-based B series from 1845 to 2013 is a weighted composite of two series that employ the interdiurnal variability index; this series is highly correlated with in situ spacecraft measurements of B (correlation coefficient, r=0.94; mean square error, MSE=0.16nT(2)). The SSN-based estimate of B, from 1750 to 2013, is a weighted composite of eight time series derived from two separate reconstruction methods applied to four different SSN time series, allowing determination of the uncertainty from both the underlying sunspot records and the B reconstruction methods. The SSN-based composite is highly correlated with direct spacecraft measurements of B and with the composite geomagnetic B time series from 1845 to 2013 (r=0.91; MSE=0.24nT(2)), demonstrating that B can accurately reconstructed by both geomagnetic and sunspot-based methods. The composite sunspot and geomagnetic B time series, with uncertainties, are provided as supporting information.SapientiaOwens, M. J.Cliver, E.McCracken, K. G.Beer, J.Barnard, L.Lockwood, M.Rouillard, A.Passos, DárioRiley, P.Usoskin, I.Wang, Y-M.2017-04-07T15:56:23Z2016-072016-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/9399eng2169-938010.1002/2016JA022529info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:20:51Zoai:sapientia.ualg.pt:10400.1/9399Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:01:21.383158Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions |
title |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions |
spellingShingle |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions Owens, M. J. |
title_short |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions |
title_full |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions |
title_fullStr |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions |
title_full_unstemmed |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions |
title_sort |
Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions |
author |
Owens, M. J. |
author_facet |
Owens, M. J. Cliver, E. McCracken, K. G. Beer, J. Barnard, L. Lockwood, M. Rouillard, A. Passos, Dário Riley, P. Usoskin, I. Wang, Y-M. |
author_role |
author |
author2 |
Cliver, E. McCracken, K. G. Beer, J. Barnard, L. Lockwood, M. Rouillard, A. Passos, Dário Riley, P. Usoskin, I. Wang, Y-M. |
author2_role |
author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Owens, M. J. Cliver, E. McCracken, K. G. Beer, J. Barnard, L. Lockwood, M. Rouillard, A. Passos, Dário Riley, P. Usoskin, I. Wang, Y-M. |
description |
We present two separate time series of the near-Earth heliospheric magnetic field strength (B) based on geomagnetic data and sunspot number (SSN). The geomagnetic-based B series from 1845 to 2013 is a weighted composite of two series that employ the interdiurnal variability index; this series is highly correlated with in situ spacecraft measurements of B (correlation coefficient, r=0.94; mean square error, MSE=0.16nT(2)). The SSN-based estimate of B, from 1750 to 2013, is a weighted composite of eight time series derived from two separate reconstruction methods applied to four different SSN time series, allowing determination of the uncertainty from both the underlying sunspot records and the B reconstruction methods. The SSN-based composite is highly correlated with direct spacecraft measurements of B and with the composite geomagnetic B time series from 1845 to 2013 (r=0.91; MSE=0.24nT(2)), demonstrating that B can accurately reconstructed by both geomagnetic and sunspot-based methods. The composite sunspot and geomagnetic B time series, with uncertainties, are provided as supporting information. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-07 2016-07-01T00:00:00Z 2017-04-07T15:56:23Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.1/9399 |
url |
http://hdl.handle.net/10400.1/9399 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2169-9380 10.1002/2016JA022529 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133242630078464 |