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  Meridional flow in the Sun’s convection zone is a single cell in each hemisphere

Gizon, L., Cameron, R. H., Pourabdian, M., Liang, Z.-C., Fournier, D., Birch, A., et al. (2020). Meridional flow in the Sun’s convection zone is a single cell in each hemisphere. Science, 368(6498), 1469-1472. doi:10.1126/science.aaz7119.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-C85B-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C85C-2
Genre: Journal Article

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 Creators:
Gizon, Laurent1, Author              
Cameron, Robert H.1, Author              
Pourabdian, Majid1, Author              
Liang, Zhi-Chao1, Author              
Fournier, Damien1, Author              
Birch, Aaron1, Author              
Hanson, Chris S., Author
Affiliations:
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              

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 Abstract: The Sun's magnetic field is generated by subsurface motions of the convecting plasma. The latitude at which the magnetic field emerges through the solar surface (as sunspots) drifts toward the equator over the course of the 11-year solar cycle. We use helioseismology to infer the meridional flow (in the latitudinal and radial directions) over two solar cycles covering 1996-2019. Two data sources are used, which agree during their overlap period of 2001-2011. The time-averaged meridional flow is shown to be a single cell in each hemisphere, carrying plasma toward the equator at the base of the convection zone with a speed of similar to 4 meters per second at 45 degrees latitude. Our results support the flux-transport dynamo model, which explains the drift of sunspot-emergence latitudes through the meridional flow.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1126/science.aaz7119
 Degree: -

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Title: Science
  Other : Science
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Association for the Advancement of Science
Pages: - Volume / Issue: 368 (6498) Sequence Number: - Start / End Page: 1469 - 1472 Identifier: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1