Abstract
AbstractThe dynamics of ionospheric troughs that developed during a great geomagnetic storm on 11–13 April 2001 are studied using measurements of electron density obtained by the CHAMP satellite at an altitude of 410–465 km. Subauroral, mid-latitude and low-latitude troughs were observed at nighttime, sometimes simultaneously. The subauroral trough is usually defined as the main ionospheric trough, whereas the mid-latitude trough is associated with the magnetospheric ring current. It appeared at the beginning of the storm recovery phase around latitudes of 40°–45° GMLat (L = 1.7–2.0) and existed for a long period of time throughout the late recovery phase of the residual ring current at latitudes of 50°–55° GMLat (L ~ 2.4–3.0). For the first time, a low-latitude trough was revealed. It developed at latitudes of 34°–45° GMLat (L = 1.45–2.00) in association with the precipitation of energetic particles from the inner radiation belt.
Publisher
Springer Science and Business Media LLC
Reference35 articles.
1. Karpachev, A. T., Biktash, L. Z. & Maruyama, T. The high-latitude ionosphere structure on March 22, 1979 magnetic storm from multi-satellite and ground-based observation. Adv. Space Res. 40(12), 1852–1857. https://doi.org/10.1016/j.asr.2007.04.088 (2007).
2. Deminov, M. G., Karpachev, A. T., Afonin, V. V., Annakuliev, S. K. & Shmilauer, Y. Dynamics of mid-latitude ionospheric trough during storms 1. A qualitative picture. Geomag. Aeron. 35(1), 54–59. https://doi.org/10.1016/0273-1177(95)00706-K (1995).
3. Pavlov, A. V. Mechanism of the electron density depletion in the SAR arc region. Ann. Geophys. 14, 211–221. https://doi.org/10.1007/s00585-996-0211-7 (1996).
4. Deminov, M. G., Karpachev, A. T. & Morozova, L. P. Subauroral ionosphere in SUNDIAL period on June 1987 on Cosmos-1809 satellite data. Geomag. Aeron. 32(1), 54–58 (1992) (in Russian).
5. Deminov, M. G., Karpachev, A. T., Annakuliev, S. K., Afonin, V. V. & Smilauer, Y. Dynamics of the ionization troughs in the night-time sub-auroral F-region during geomagnetic storms. Adv. Space Res. 17(10), 141–145. https://doi.org/10.1016/0273-1177(95)00706-K (1996).
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献