Speaker
Nadezhda V. Zolotova
(Earth's Physics Department, St.Petersburg State University)
Description
Using Greenwich catalogue of sunspots and magnetic field
observations
it was shown that impulses of sunspot activity during a course of
solar cycle are responsible for residual magnetic flux transported
by
meridional circulation toward the poles. This, in turn, is related to
the polarity reversal of the axisymmetric magnetic fields. Single
and
compound magnetic field reversals at solar poles during
1875-2012 are
reconstructed and compared with reversals restored from Hα
synoptic
maps. Asynchronous reversals in both hemispheres are compared
also
with the phase differences between northern and southern
activities.
Relationships between the strong cycles 18 and 19 with the
strength of
the polar magnetic field at solar minimums are discussed.
Primary authors
Dmitri I. Ponyavin
(Earth's Physics Department, St.Petersburg State University)
Nadezhda V. Zolotova
(Earth's Physics Department, St.Petersburg State University)
