Time-varying component of the solar meridional flow

Laurent Gizon, Matthias Rempel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present helioseismic observations of the solar-cycle variation of flows near the solar surface and at a depth of about 60 Mm, in the latitude range ±45°. The time-varying components of the meridional flow at these two depths have opposite sign, while the time-varying components of the zonal flow are in phase. We investigate a theoretical model based on a flux-transport dynamo combined with a geostrophic flow caused by increased radiative loss in the active region belt. The model and the data are in qualitative agreement, although the amplitude of the solar-cycle variation of the meridional flow at 60 Mm appears to be underestimated by the model.

Original languageEnglish (US)
Title of host publicationSOHO 18/GONG 2006/HELAS I Beyond the spherical Sun
StatePublished - Oct 2006
EventSOHO 18/GONG 2006/HELAS I Beyond the spherical Sun - Sheffield, United Kingdom
Duration: Aug 7 2006Aug 11 2006

Publication series

NameEuropean Space Agency, (Special Publication) ESA SP
Volume624 SP
ISSN (Print)0379-6566

Other

OtherSOHO 18/GONG 2006/HELAS I Beyond the spherical Sun
CountryUnited Kingdom
CitySheffield
Period8/7/068/11/06

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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  • Cite this

    Gizon, L., & Rempel, M. (2006). Time-varying component of the solar meridional flow. In SOHO 18/GONG 2006/HELAS I Beyond the spherical Sun (European Space Agency, (Special Publication) ESA SP; Vol. 624 SP).