New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action

Detalhes bibliográficos
Autor(a) principal: Passos, D.
Data de Publicação: 2016
Outros Autores: Charbonneau, P., Miesch, M. S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/9744
Resumo: The solar meridional circulation is a "slow", large scale flow that transports magnetic field and plasma throughout the convection zone in the (r, theta) plane and plays a crucial role in controlling the magnetic cycle solutions presented by flux transport dynamo models. Observations indicate that this flow speed varies in anti-phase with the solar cycle at the solar surface. A possible explanation for the source of this variation is based on the fact that inflows into active regions alter the global surface pattern of the meridional circulation. In this work we examine the meridional circulation profile that emerges from a 3D global simulation of the solar convection zone, and its associated dynamics. We find that at the bottom of the convection zone, in the region where the toroidal magnetic field accumulates, the meridional circulation is highly modulated through the action of a magnetic torques and thus provides evidence for a new mechanism to explain the observed cyclic variations.
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spelling New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo actionThe solar meridional circulation is a "slow", large scale flow that transports magnetic field and plasma throughout the convection zone in the (r, theta) plane and plays a crucial role in controlling the magnetic cycle solutions presented by flux transport dynamo models. Observations indicate that this flow speed varies in anti-phase with the solar cycle at the solar surface. A possible explanation for the source of this variation is based on the fact that inflows into active regions alter the global surface pattern of the meridional circulation. In this work we examine the meridional circulation profile that emerges from a 3D global simulation of the solar convection zone, and its associated dynamics. We find that at the bottom of the convection zone, in the region where the toroidal magnetic field accumulates, the meridional circulation is highly modulated through the action of a magnetic torques and thus provides evidence for a new mechanism to explain the observed cyclic variations.SCOSTEP, Variabil Sun & Its Terrestrial Impact; European Space Agcy; Fundacio Ciencia & Tecnologia; Univ Coimbra Reitoria; Univ Coimbra, Dept Matemat; Observat ParisSCOSTEP, Variabil Sun & Its Terrestrial Impact; European Space Agcy; Fundacio Ciencia & Tecnologia; Univ Coimbra Reitoria; Univ Coimbra, Dept Matemat; Observat ParisSapientiaPassos, D.Charbonneau, P.Miesch, M. S.2017-04-07T15:57:33Z20162016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/9744eng978-1-58381-892-3info: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:RCAAP2023-07-24T10:21:16Zoai:sapientia.ualg.pt:10400.1/9744Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:01:36.533946Repositório 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 New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
title New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
spellingShingle New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
Passos, D.
title_short New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
title_full New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
title_fullStr New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
title_full_unstemmed New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
title_sort New insights about meridional circulation dynamics from 3D MHD global simulations of solar convection and dynamo action
author Passos, D.
author_facet Passos, D.
Charbonneau, P.
Miesch, M. S.
author_role author
author2 Charbonneau, P.
Miesch, M. S.
author2_role author
author
dc.contributor.none.fl_str_mv Sapientia
dc.contributor.author.fl_str_mv Passos, D.
Charbonneau, P.
Miesch, M. S.
description The solar meridional circulation is a "slow", large scale flow that transports magnetic field and plasma throughout the convection zone in the (r, theta) plane and plays a crucial role in controlling the magnetic cycle solutions presented by flux transport dynamo models. Observations indicate that this flow speed varies in anti-phase with the solar cycle at the solar surface. A possible explanation for the source of this variation is based on the fact that inflows into active regions alter the global surface pattern of the meridional circulation. In this work we examine the meridional circulation profile that emerges from a 3D global simulation of the solar convection zone, and its associated dynamics. We find that at the bottom of the convection zone, in the region where the toroidal magnetic field accumulates, the meridional circulation is highly modulated through the action of a magnetic torques and thus provides evidence for a new mechanism to explain the observed cyclic variations.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01T00:00:00Z
2017-04-07T15:57:33Z
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/10400.1/9744
url http://hdl.handle.net/10400.1/9744
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 978-1-58381-892-3
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.publisher.none.fl_str_mv SCOSTEP, Variabil Sun & Its Terrestrial Impact; European Space Agcy; Fundacio Ciencia & Tecnologia; Univ Coimbra Reitoria; Univ Coimbra, Dept Matemat; Observat ParisSCOSTEP, Variabil Sun & Its Terrestrial Impact; European Space Agcy; Fundacio Ciencia & Tecnologia; Univ Coimbra Reitoria; Univ Coimbra, Dept Matemat; Observat Paris
publisher.none.fl_str_mv SCOSTEP, Variabil Sun & Its Terrestrial Impact; European Space Agcy; Fundacio Ciencia & Tecnologia; Univ Coimbra Reitoria; Univ Coimbra, Dept Matemat; Observat ParisSCOSTEP, Variabil Sun & Its Terrestrial Impact; European Space Agcy; Fundacio Ciencia & Tecnologia; Univ Coimbra Reitoria; Univ Coimbra, Dept Matemat; Observat Paris
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instacron:RCAAP
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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