Speaker
Bidya Binay Karak
(Nordita)
Description
One of the most striking aspects of 11-year sunspot cycles
is that there have been times in the past when sunspots did
not appear for several years. The
most well-known example of this is the Maunder minimum
during 1645-1715. Analyses of cosmogenic isotopes (14C and
10Be) indicate that there have been about 27 grand minima in
the last 11,000 yr. In my talk I shall address
the question how grand minima are produced in dynamo models.
First, we shall summarize the results of modeling grand
minima using mean-field models, particularly the flux
transport dynamo model. Then we shall explore whether the
grand minima are self-consistently reproduced in
three-dimensional direct numerical simulations of
large-scale dynamos.
Primary author
Bidya Binay Karak
(Nordita)
