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8. Magnetic Shear and Nonpotential Energy Evolution of Solar Minimum and the Onset of Solar Cycle 23

Author

Li RF(李如凤), H Zhang, Zhang BR(张柏荣), and Dun JP(敦金平)

Subjects
Solar minimum, Physics, Sunspot, Shear (geology), Physics::Space Physics, Coronal mass ejection, Astrophysics::Solar and Stellar Astrophysics, Solar cycle 23, Geophysics, Interplanetary magnetic field, Magnetic flux, Computational physics, Magnetic field
Abstract

Using a 1995-1998 data set of vector magnetograms, the magnetic field flux, shear angle of the transverse field and nonpotential energy of active regions were calculated. The evolution of these parameters were analyzed together with time series of the solar monthly sunspot relative number and area to study their relationships in the ascending phase of solar cycle 23. We find the magnetic flux and nonpotential energy have a good correlation with sunspot relative number and area. But the magnetic shear angle does not develop as above indices.

Published
2001

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