2010/04/13 by Hideyuki Hotta, H. Hotta, T. Yokoyama · 3 citations
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Atmospheric sciences #Computational physics #Dipole #Dipole model of the Earth's magnetic field #Dynamo #Dynamo theory #Earth's magnetic field #Geomagnetism and Paleomagnetism Studies #Interplanetary magnetic field #Ionosphere and magnetosphere dynamics #L-shell #Magnetic Prandtl number #Magnetic diffusivity #Magnetic dipole #Magnetic field #Magnetohydrodynamics #Mechanics #Mercury's magnetic field #Meridional flow #Physics #Quantum mechanics #Reynolds number #Solar and Space Plasma Dynamics #Solar dynamo #Solar wind #Thermal diffusivity #Turbulence #Zonal and meridional #astro-ph.SR
paper · pdf · doi:10.1088/2041-8205/714/2/l308
19 pages, 5 figures
arxiv created 2010/04/13 · openalex publication_date 2010/04/26 · arxiv updated 2015/05/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigated the dependence of the solar magnetic parity between the hemispheres on two important parameters, the turbulent diffusivity and the meridional flow, by means of axisymmetric kinematic dynamo simulations based on the flux-transport dynamo model. It is known that the coupling of the magnetic field between hemispheres due to turbulent diffusivity is an important factor for the solar parity issue, but the detailed criterion for the generation of the dipole field has not been investigated. Our conclusions are as follows. (1) The stronger diffusivity near the surface is more likely to cause the magnetic field to be a dipole. (2) The thinner layer of the strong diffusivity near the surface is also more apt to generate a dipolar magnetic field. (3) The faster meridional flow is more prone to cause the magnetic field to be a quadrupole, i.e., symmetric about the equator. These results show that turbulent diffusivity and meridional flow are crucial for the configuration of the solar global magnetic field.