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Valentina Zharkova   Submitted: 2008-02-07 07:55

The observed phase relations between the weak background solar magnetic (poloidal) eld and strong magnetic eld associated with sunspots (toroidal eld) measured at dierent latitudes are presented. For measurements of the solar magnetic eld (SMF) the low-resolution images obtained from Wilcox Solar Observatory (WSO) are used while sunspot magnetic eld was taken from the Solar Feature Catalogues utilizing the SOHO/MDI fulldisk magnetograms. The quasi- 3D latitudinal distributions of sunspot areas and magnetic elds obtained for 30 latitudinal bands (15 in the northern and 15 in the southern hemispheres) within the whole -hemispheres in longitudes are correlated with those of the background SMF. The sunspot areas in all latitudinal zones (averaged with a sliding one-year lter) reveal a strong positive correlation with the absolute SMF in the same zone appearing rst with a zero timelag and repeating with a two  three year time lag through the whole period of observations. The residuals of the sunspot areas averaged by one year and those by four years are also shown to have a well dened periodic structure visible in every two  three years close to =4 with the maxima occurring at

Authors: Zharkov S.I., Gavryuseva,E. and Zharkova V.V
Projects: SoHO-MDI

Publication Status: Solar Physics, in press
Last Modified: 2008-02-07 07:55
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