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

Published online by Cambridge University Press:  13 May 2016

J. Dun ,
H. Zhang ,
B. Zhang  and
R. Li
J. Dun
Affiliation:
Beijing Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012, China Yunnan Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences Kunming, Yunnan, 650011, China
H. Zhang
Affiliation:
Beijing Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012, China
B. Zhang
Affiliation:
Yunnan Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences Kunming, Yunnan, 650011, China
R. Li
Affiliation:
Yunnan Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences Kunming, Yunnan, 650011, China

Abstract

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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.

Type
Session III: Active Region Structure and Dynamics
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 267 - 269
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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