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An electrostatic model for nonlinear waves in the upper ionosphere
Shi, J. K.; Xu, B. Y.; Torkar, K.; Zhang, T. L.; Liu, Z. X.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationAdvances in Space Research
2003
Pages303-308
Language英语
ISSN0273-1177
AbstractAccording to observations by the Freja satellite in the upper ionosphere, amplitudes of magnetic disturbances associated with observed density solitons are, only several 10(-2) nT or less. These very weak magnetic disturbances can be neglected against the ambient magnetic field of 0.2 Gauss in Freja's orbit region. In this paper we establish an electrostatic model for the nonlinear waves observed on board of Freja. The fluid equations are used and the "Sagdeev potential" is derived to study the nonlinear waves. The results show the existence not only of solitons with a density hump and solitons with a density dip, but also of periodic density waves and-density shock waves. The theoretic amplitudes of the solitons may vary between 20% and a factor of 2, which is consistent with the observations on board of Freja. Some waveforms of the solitons with a density dip are very similar to the observed ones. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
Conference NameConference on Future Trends and Needs in Science and Engineering for Plasma Physics in Space held at the 34th COSPAR Scientific Assembly
Conference Date2003
Conference PlaceHouston, Texas
Indexed ByCPCI
Document Type会议论文
Identifierhttp://ir.nssc.ac.cn/handle/122/944
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Shi, J. K.,Xu, B. Y.,Torkar, K.,et al. An electrostatic model for nonlinear waves in the upper ionosphere[C]. KIDLINGTON:Pergamon-Elsevier Science Ltd,2003:303-308.
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