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| Influence of Fast Global Variations of Solar Magnetic Fields on Space Weather in Cycle 23 | |
| 引用本文： | S.I.Molodykh,G.A.Zherebtsov,V.A.Kovalenko,V.I.Sidorov. Influence of Fast Global Variations of Solar Magnetic Fields on Space Weather in Cycle 23[J]. 空间科学学报, 2005, 25(5): 460-467 |
| 作者姓名： | S.I.Molodykh G.A.Zherebtsov V.A.Kovalenko V.I.Sidorov |
| 作者单位： | Institute of Solar-Terrestrial Physics，Siberian Branch，Russian Academy of Sciences，Irkutsk 664033，Russia National Astronomical Observatory，Chinese Academy of Sciences，Institute of Solar-Terrestrial Physics，Siberian Branch，Russian Academy of Sciences，Irkutsk 664033，Russia，Institute of Solar-Terrestrial Physics，Siberian Branch，Russian Academy of Sciences，Irkutsk 664033，Russia，Institute of Solar-Terrestrial Physics，Siberian Branch，Russian Academy of Sciences，Irkutsk 664033，Russia |
| 基金项目： | Supported by the China-Russia Joint Research Center on Space Weather,Chinese Academy of Sciences |
| 摘 要： | It is established that the large-scale and global magnetic fields in the Sun's atmosphere do not change smoothly, and long-lasting periods of gradual variations are superseded by fast structural changes of the global magnetic field. Periods of fast global changes on the Sun are accompanied by anomalous manifestations in the interplanetary space and in the geomagnetic field. There is a regular recurrence of these periods in each cycle of solar activity, and the periods are characterized by enhanced flaring activity that reflects fast changes in magnetic structures. Is demonstrated, that the fast changes have essential influencing on a condition of space weather, as most strong geophysical disturbances are connected to sporadic phenomena on the Sun. An explanation has been offered for the origin of anomalous geomagnetic disturbances that are unidentifiable in traditionally used solar activity indices. Is shown, main physical mechanism that leads to fast variations of the magnetic fields in the Sun's atmosphere is the reconnection process. |
| 关 键 词： | 太阳活动 磁场 空间气候 大气 动态变化 太阳光 |
Influence of Fast Global Variations of Solar Magnetic Fields on Space Weather in Cycle 23 |
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| S. I. Molodykh,G.A. Zherebtsov,V.A. Kovalenko,J.X. Wang,V.I. Sidorov. Influence of Fast Global Variations of Solar Magnetic Fields on Space Weather in Cycle 23[J]. Chinese Journal of Space Science, 2005, 25(5): 460-467 | |
| Authors: | S. I. Molodykh G.A. Zherebtsov V.A. Kovalenko J.X. Wang V.I. Sidorov |
| Affiliation: | 1. Institute of Solar-Terrestrial Physics, Siberian Branch, Russian Academy of Sciences, Irkutsk 664033, Russia;National Astronomical Observatory, Chinese Academy of Sciences 2. Institute of Solar-Terrestrial Physics, Siberian Branch, Russian Academy of Sciences, Irkutsk 664033, Russia 3. National Astronomical Observatory, Chinese Academy of Sciences |
| Abstract: | It is established that the large-scale and global magnetic fields in the Sun's atmosphere do not change smoothly, and long-lasting periods of gradual variations are superseded by fast structural changes of the global magnetic field. Periods of fast global changes on the Sun are accompanied by anomalous manifestations in the interplanetary space and in the geomagnetic field. There is a regular recurrence of these periods in each cycle of solar activity, and the periods are characterized by enhanced flaring activity that reflects fast changes in magnetic structures. Is demonstrated, that the fast changes have essential influencing on a condition of space weather, as most strong geophysical disturbances are connected to sporadic phenomena on the Sun. An explanation has been offered for the origin of anomalous geomagnetic disturbances that are unidentifiable in traditionally used solar activity indices. Is shown, main physical mechanism that leads to fast variations of the magnetic fields in the Sun's atmosphere is the reconnection process. |
| Keywords: | Solar magnetic fields Solar corona Space weather |
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