TY - GEN
T1 - Time-varying component of the solar meridional flow
AU - Gizon, Laurent
AU - Rempel, Matthias
PY - 2006/10
Y1 - 2006/10
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:33847351747
SN - 9290929359
SN - 9789290929352
T3 - European Space Agency, (Special Publication) ESA SP
BT - SOHO 18/GONG 2006/HELAS I Beyond the spherical Sun
T2 - SOHO 18/GONG 2006/HELAS I Beyond the spherical Sun
Y2 - 7 August 2006 through 11 August 2006
ER -