| Issue |
EAS Publications Series
Volume 55, 2012
4th French-Chinese Meeting on Solar Physics - Understanding Solar Activity: Advances and Challenges
|
|
|---|---|---|
| Page(s) | 29 - 34 | |
| Section | Magnetic Field and Polarization Measurements and Theory | |
| DOI | https://doi.org/10.1051/eas/1255004 | |
| Published online | 27 June 2012 | |
M. Faurobert, C. Fang and T. Corbard (eds)
EAS Publications Series, 55 (2012) 29-34
Evolution of coronal hole boundaries observed by SDO
Key Laboratory of Solar Activity, National Astronomical
Observatories, Chinese Academy of Sciences, Beijing
100012,
China
e-mail: shuhongyang@nao.cas.cn
With the observations from the Solar Dynamics Observatory, we investigate the boundary evolution of a coronal hole (CH). Small-scale solar activity (e.g., coronal jet) can lead to gradual change of CH boundaries (CHBs). Besides gradual change of CHBs, a quiet Sun region can change into a CH region on a large scale when magnetic fields in the photosphere evolve from mixed-polarities into one-polarity dominance. CH regions can also evolve into quiet regions on a large scale when the underlying photosphere becomes mixed-polarity fields from one-polarity dominated fields.
© EAS, EDP Sciences 2012