A new interpretation on the origin of enhanced ion acoustic fluctuations in the upper ionosphere
A new interpretation on the origin of enhanced ion acoustic fluctuations in the upper ionosphere
复制标题
电离层上层离子声波波动增强起源的新解释
DOI：
10.1029/93gl02490
复制
发表时间：
1993
影响因子：
5.2
通讯作者：
F. Forme
中科院分区：
文献类型：
--
作者：
F. Forme
最近的观测表明，在电离层上部存在增强的离子声波动。这些特征已被现代非相干散射雷达观测到。人们提出了几种解释来解释这些观测结果，但没有一种解释能解释所有的观测特征。在这里，作者提出了一种新的解释。该模型假设电子束的束不稳定性产生的朗缪尔波在电离层上部产生。这些波然后产生背散射朗缪尔波和离子声波。产生这种波活动所需的电子电流的大小与以前的电离层测量结果一致。
Recent observation have noted the existence of enhanced ion acoustic fluctuations in the upper ionosphere. These features have been observed by modern incoherent scatter radars. Several explanations have been offered to account for the observations, but none can account for all of the observational features. Here the author offers a new interpretation. This model assumes that Langmuir waves generated by a beam instability from an electron beam are generated in the upper ionosphere. These wave then produce backscattered Langmuir waves and ion acoustic waves. The magnitudes of electron currents necessary to generate such wave activity are consistent with previous ionospheric measurements.