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UFMG_66e7ea2243fb44cc621f7716e7af58fd
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oai:repositorio.ufmg.br:1843/60869
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UFMG
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Repositório Institucional da UFMG
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Repositório Institucional da UFMG
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UFMG
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Universidade Federal de Minas Gerais (UFMG)
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Universidade Federal de Minas Gerais (UFMG)
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2023-11-13T16:16:38Z2023-11-13T16:16:38Z20198881111https://doi.org/10.3847/1538-4357/ab58541538-4357http://hdl.handle.net/1843/60869https://orcid.org/0000-0001-7483-3257https://orcid.org/0000-0002-2671-8796https://orcid.org/0000-0003-0364-4883https://orcid.org/0000-0001-7077-3285Various models of solar subsurface stratification are tested in the global EULAG-MHD solver to simulate diverse regimes of near-surface convective transport. Sub- and superadiabacity are altered at the surface of the model (r > 0.95R⊙) to either suppress or enhance convective flow speeds in an effort to investigate the impact of the near-surface layer on global dynamics. A major consequence of increasing surface convection rates appears to be a significant alteration of the distribution of angular momentum, especially below the tachocline where the rotational frequency predominantly increases at higher latitudes. These hydrodynamic changes correspond to large shifts in the development of the current helicity in this stable layer (r < 0.72R⊙), significantly altering its impact on the generation of poloidal and toroidal fields at the tachocline and below, acting as a major contributor toward transitions in the dynamo cycle. The enhanced near-surface flow speed manifests in a global shift of the toroidal field (Bϕ) in the butterfly diagram, from a north–south symmetric pattern to a staggered antisymmetric emergence.engUniversidade Federal de Minas GeraisUFMGBrasilICX - DEPARTAMENTO DE FÍSICAThe Astrophysical JournalSolSolar physicsMagnetohydrodynamical simulationsSolar dynamo3D MHD modeling of the impact of subsurface stratification on the solar dynamoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://iopscience.iop.org/article/10.3847/1538-4357/ab5854Andrey M. StejkoGustavo Andres Guerrero ErasoAlexander G. KosovichevPiotr Krzysztof Smolarkiewiczapplication/pdfinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGLICENSELicense.txtLicense.txttext/plain; charset=utf-82042https://repositorio.ufmg.br/bitstream/1843/60869/1/License.txtfa505098d172de0bc8864fc1287ffe22MD51ORIGINAL3D MHD Modeling of the Impact of Subsurface.pdf3D MHD Modeling of the Impact of Subsurface.pdfapplication/pdf1797535https://repositorio.ufmg.br/bitstream/1843/60869/2/3D%20MHD%20Modeling%20of%20the%20Impact%20of%20Subsurface.pdff985759641733d9a29d7d602e8b21e48MD521843/608692023-11-13 18:46:03.538oai:repositorio.ufmg.br:1843/60869Repositório InstitucionalPUBhttps://repositorio.ufmg.br/oaiopendoar:2023-11-13T21:46:03Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false
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