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Abstract
Every eleven years on average, the dipolar component of the Sun's global coronal magnetic field reverses in sign  a consequence of the sunspot cycle. In this paper we begin to investigate the complex changes in coronal structure during the reversal. We present a simplified model of the solar cycle containing six timevarying photospheric sources of magnetic field and analyse the evolution of the global coronal field using the technique of magnetic charge topology. Surprisingly, a sequence of seventeen topological changes takes place in the model between one solar minimum state and the next; many of the resultant topological configurations correspond to observable magnetic field structures in the real corona. We also show how descriptions of all the sixsource topological states from the model can be built up in terms of combinations of simpler foursource states, providing a framework for future descriptions of even more complicated topological states.
Original language  English 

Pages (fromto)  171191 
Number of pages  21 
Journal  Solar Physics 
Volume  243 
DOIs  
Publication status  Published  Jul 2007 
Keywords
 LARGESCALE CORONA
 FLUX EMERGENCE
 SPHERICAL GEOMETRY
 MERIDIONAL FLOW
 CYCLE
 SUN
 RECONNECTION
 EVOLUTION
 MODEL
 SEPARATORS
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Dive into the research topics of 'Topological aspects of global magnetic field reversal in the solar corona'. Together they form a unique fingerprint.Projects
 1 Finished

Solar&Magnetospheric Plasma Theory PP/E1: Solar and Magnetospheric Plasma Theory
Neukirch, T., Hood, A. W., Parnell, C. E., Priest, E. R., Roberts, B. & Wright, A. N.
1/04/07 → 31/03/12
Project: Standard