Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Explaining the variation of the meridional circulation with the solar
  cycle   The meridional circulation of the Sun is observationally found to vary with
the solar cycle, becoming slower during the solar maxima. We explain this by
constructing a theoretical model in which the equation of the meridional
circulation (the $\phi$ component of the vorticity equation) is coupled with
the equations of the flux transport dynamo model. We find that the Lorentz
force of the dynamo-generated magnetic fields can slow down the \MC\ during the
solar maxima in broad conformity with the observations.

15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn