| Seasonal and latitudinal differences of the saturation effect between ionospheric NmF2 and solar activity indices | |
| Ma, R. P.; Xu, J. Y.; Wang, W. B.; Yuan, W.; 北京8701信箱 | |
| Department | 空间天气学国家重点实验室 |
| Source Publication | Journal of Geophysical Research-Space Physics
 |
| 2009 | |
| Volume | 114Pages:A10303 |
| ISSN | 0148-0227 |
| Language | 英语 |
| Keyword | International Reference Ionosphere Peak Electron-density Cycle Variations Global-model Radio Noise F-region Euv Fof2 Winds Atmosphere |
| Abstract | The seasonal and latitudinal differences of the correlations between daytime ionospheric F-2 peak electron density (NmF2) and solar activity indices in the east Asian/Australian sector have been analyzed using data from 15 ionosonde stations at different geomagnetic latitudes during 1969 similar to 1990. It is found that the characteristics of the correlations between NmF2 and solar activity indices have significant seasonal and latitudinal variations and hemispheric asymmetry. At middle and high latitudes, there is a clear saturation trend in NmF2 as solar activity increases in summer. However, there is no apparent saturation trend in winter, rather a tendency of nonlinear increase of NmF2 with solar activity. This nonlinear increasing effect is more pronounced in the Northern Hemisphere. In the equatorial anomaly region, the saturation effect is stronger, and the equinox has the strongest saturation effect. All seasons considered, the equatorial anomaly region has the strongest saturation effect, followed by the magnetic equatorial region. The saturation effect becomes relatively weak at middle latitudes. At higher latitudes and in the Northern Hemisphere, there is even a trend of nonlinear increase of NmF2 with solar activity. Our results indicate that thermospheric global circulation is probably an important factor that introduces seasonal, latitudinal, and north-south differences in the correlations between NmF2 and solar activity indices. |
| Indexed By | SCI |
| Funding Project | 中国科学院空间科学与应用研究中心 |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/1135 |
| Collection | 空间科学部 |
| Corresponding Author | 北京8701信箱 |
| Recommended Citation GB/T 7714 | Ma, R. P.,Xu, J. Y.,Wang, W. B.,et al. Seasonal and latitudinal differences of the saturation effect between ionospheric NmF2 and solar activity indices[J]. Journal of Geophysical Research-Space Physics,2009,114:A10303. |
| APA | Ma, R. P.,Xu, J. Y.,Wang, W. B.,Yuan, W.,&北京8701信箱.(2009).Seasonal and latitudinal differences of the saturation effect between ionospheric NmF2 and solar activity indices.Journal of Geophysical Research-Space Physics,114,A10303. |
| MLA | Ma, R. P.,et al."Seasonal and latitudinal differences of the saturation effect between ionospheric NmF2 and solar activity indices".Journal of Geophysical Research-Space Physics 114(2009):A10303. |
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| 2009114A10303.pdf（674KB） | 开放获取 | CC BY-NC-SA | View Download | |||
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