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Surface Flux Evolution Constraints For Flux Transport Dynamos

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Author
Işık, Emre
Cameron, R. H.
Schmitt, D.
Jiang, J.
Type
Article
Date
2012-06
Language
en_US
Metadata
Show full item record
Abstract
The surface flux transport (SFT) model of solar magnetic fields involves empirically well-constrained velocity and magnetic fields. The basic evolution of the Sun's large-scale surface magnetic field is well described by this model. The azimuthally averaged evolution of the SFT model can be compared to the surface evolution of the flux transport dynamo (FTD), and the evolution of the SFT model can be used to constrain several near-surface properties of the FTD model. We compared the results of the FTD model with different upper boundary conditions and diffusivity profiles against the results of the SFT model. Among the ingredients of the FTD model, downward pumping of magnetic flux, related to a positive diffusivity gradient, has a significant effect in slowing down the diffusive radial transport of magnetic flux through the solar surface. Provided the pumping was strong enough to give rise to a downflow of a magnetic Reynolds number of 5 in the near-surface boundary layer, the FTD using a vertical boundary condition matches the SFT model based on the average velocities above the boundary layer. The FTD model with a potential field was unable to match the SFT results.
Subject
dynamo
Sun: activity
differential rotation
solar-cycle
penetrative convection
meridional flow
magnetic-field
tilt angles
models
oscillations
dinamo
Güneş: faaliyet
diferansiyel dönüş
Güneş döngüsü
penetratif konveksiyon
meridyen akış
manyetik alan
eğim açısı
modeller
salınımlar
URI
http://hdl.handle.net/11413/1594
Collections
  • Makaleler / Articles [293]
  • Scopus Publications [724]
  • WoS Publications [1016]

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İstanbul Kültür University

Hakkında |Politika | Kütüphane | İletişim | Send Feedback | Admin

Istanbul Kültür University, Ataköy Campus E5 Karayolu Üzeri Bakırköy 34158, İstanbul / TURKEY
Copyright © İstanbul Kültür University

Creative Commons Lisansı
IKU Institutional Repository, Creative Commons Alıntı-GayriTicari-Türetilemez 4.0 Uluslararası Lisansı ile lisanslanmıştır.

Designed by  UNIREPOS