Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport
The solar dynamo problem is the question of how the cyclic variation in the solar magnetic field is maintained. One of the important processes is the transport of magnetic flux by surface convection. To reveal this process, the dependence of the squared displacement of magnetic flux concentrations o...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2016-01-01
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| Series: | Journal of Space Weather and Space Climate |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1051/swsc/2016022 |
| _version_ | 1818652036907925504 |
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| author | Iida Yusuke |
| author_facet | Iida Yusuke |
| author_sort | Iida Yusuke |
| collection | DOAJ |
| description | The solar dynamo problem is the question of how the cyclic variation in the solar magnetic field is maintained. One of the important processes is the transport of magnetic flux by surface convection. To reveal this process, the dependence of the squared displacement of magnetic flux concentrations on the elapsed time is investigated in this paper via a feature-recognition technique and a continual five-day magnetogram. This represents the longest time scale over which a satellite observation has ever been performed for this problem. The dependence is found to follow a power law and differ significantly from that of diffusion transport. Furthermore, there is a change in the behavior at a spatial scale of 103.8 km. A super-diffusion behavior with an index of 1.4 is found at smaller scales, while changing to a sub-diffusion behavior with an index of 0.6 on larger ones. We interpret this difference in the transport regime as coming from the network-flow pattern. |
| first_indexed | 2024-12-17T02:15:38Z |
| format | Article |
| id | doaj.art-85282925701f418fb86e48badd7d7f8e |
| institution | Directory Open Access Journal |
| issn | 2115-7251 |
| language | English |
| last_indexed | 2024-12-17T02:15:38Z |
| publishDate | 2016-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of Space Weather and Space Climate |
| spelling | doaj.art-85282925701f418fb86e48badd7d7f8e2022-12-21T22:07:25ZengEDP SciencesJournal of Space Weather and Space Climate2115-72512016-01-016A2710.1051/swsc/2016022swsc150016Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transportIida YusukeThe solar dynamo problem is the question of how the cyclic variation in the solar magnetic field is maintained. One of the important processes is the transport of magnetic flux by surface convection. To reveal this process, the dependence of the squared displacement of magnetic flux concentrations on the elapsed time is investigated in this paper via a feature-recognition technique and a continual five-day magnetogram. This represents the longest time scale over which a satellite observation has ever been performed for this problem. The dependence is found to follow a power law and differ significantly from that of diffusion transport. Furthermore, there is a change in the behavior at a spatial scale of 103.8 km. A super-diffusion behavior with an index of 1.4 is found at smaller scales, while changing to a sub-diffusion behavior with an index of 0.6 on larger ones. We interpret this difference in the transport regime as coming from the network-flow pattern.http://dx.doi.org/10.1051/swsc/2016022SunMagnetic fieldPhotosphereSurfaceSolar cycle |
| spellingShingle | Iida Yusuke Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport Journal of Space Weather and Space Climate Sun Magnetic field Photosphere Surface Solar cycle |
| title | Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport |
| title_full | Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport |
| title_fullStr | Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport |
| title_full_unstemmed | Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport |
| title_short | Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport |
| title_sort | tracking of magnetic flux concentrations over a five day observation and an insight into surface magnetic flux transport |
| topic | Sun Magnetic field Photosphere Surface Solar cycle |
| url | http://dx.doi.org/10.1051/swsc/2016022 |
| work_keys_str_mv | AT iidayusuke trackingofmagneticfluxconcentrationsoverafivedayobservationandaninsightintosurfacemagneticfluxtransport |