Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatiotemporal fragmentation as a mechanism for different dynamical
  modes of behaviour in the solar convection zone   Recent analyses of the helioseismic observations indicate that the previously
observed surface torsional oscillations with periods of about 11 years extend
significantly downwards into the solar convective zone. Furthermore, there are
indications that the dynamical regimes at the base of the convection zone are
different from those observed at the top, having either significantly shorter
periods or non-periodic behaviour.
  We propose that this behaviour can be explained by the occurrence of {\it
spatiotemporal fragmentation}, a crucial feature of which is that such
behaviour can be explained solely through nonlinear spatiotemporal dynamics,
without requiring separate mechanisms with different time scales at different
depths.
  We find evidence for this mechanism in the context of a two dimensional
axisymmetric mean field dynamo model operating in a spherical shell, with a
semi-open outer boundary condition, in which the only nonlinearity is the
action of the azimuthal component of the Lorentz force of the dynamo generated
magnetic field on the solar angular velocity.

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The categories of this paper are: hep-ph
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg