Nonlinear effects in the ionosphere
Nonlinear effects in the ionosphere
复制标题
DOI：
10.1070/pu2007v050n11abeh006212
复制
发表时间：
2007-11
期刊：
影响因子：
2.7
通讯作者：
A. Gurevich
中科院分区：
文献类型：
--
作者：
A. Gurevich
这篇综述是基于作者在纪念维塔利·L·金兹伯格90岁生日的RAS物理科学部会议上提交的一份报告。它检查了目前的理论和实验研究的非线性现象，当一个强大的无线电波在电离层传播。重点研究了无线电波在自然等离子体振荡的共振激励下对电离层的修正。高杂化共振产生强的高杂化等离子体波和低杂化等离子体波；激发强烈拉长的电离层不规则，并诱导人工电离层射电发射。当上杂化频率接近电子回旋频率的一个倍数时，非线性过程在双共振附近发生完全转换。在朗缪尔共振附近，强烈的等离子体波和离子声波被激发，电子被有效地加速，电离层出现人工辉光。
The review is based in a report presented by the author at the RAS Physical Sciences Division's session in honor of Vitaly L Ginzburg's 90th birthday. It examines the current status of theoretical and experimental research on nonlinear phenomena arising when a powerful radio wave propagates in the ionosphere. The focus is on the modification of the ionosphere under the resonance excitation of natural plasma oscillations by radio waves. The upper-hybrid resonance gives rise to strong upper- and lower-hybrid plasma waves; excites strongly elongated ionospheric irregularities, and induces artificial ionospheric radio emission. Nonlinear processes are found to undergo complete transformation near double resonances, when the upper-hybrid frequency is close to a multiple of the electron gyromagnetic frequency. In the neighborhood of the Langmuir resonance, intense plasma waves and ion-sound waves are excited, electrons are effectively accelerated, and an artificial glow of the ionosphere appears.