• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Recent advances and difficulties of infrasonic wave investigation in the ionosphere
【24h】

Recent advances and difficulties of infrasonic wave investigation in the ionosphere

机译：电离层次声波研究的最新进展和困难

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Acoustic waves have a remarkable ability to transfer energy from the ground up to the uppermost layers of the atmosphere. On the ground, there are many permanent sources of infrasound, and also pulsed and/or sporadic sources (e.g., sea waves, infrasonic and sonic noise of cities, lightning, earthquakes, explosions, etc.). The infrasonic waves carry away the major part of their energy upwards through the atmosphere. What are the consequences of the upward energy transfer? What heights of the atmosphere are supplied by energy from various sources of an infrasonic wave? In most cases, the answers to these questions are not well known at present. The only opportunity to monitor the propagation of an infrasonic wave to high altitudes is to watch for its influence on the ionospheric plasma. Unfortunately, most of standard equipment for ionospheric sounding, as a rule, cannot detect plasma fluctuations in the infrasonic range. Besides, the form of an infrasonic wave strongly varies during propagation due to nonlinear effects. However, the development of the Doppler method of radiosounding of the ionosphere has enabled progress to be made. Simultaneously, the ionospheric method for sensing aboveground and underground explosions has been developed. Its main advantage is the remote observation of an explosion in the near field zone by means of short radio waves, i.e., the radio sounding of the ionosphere directly above the explosion. The theory of propagation of an acoustic pulse produced by an explosion on the ground up to ionospheric heights has been developed better than the theory for other sources, and has been quantitatively confirmed by experiments. A review of some advances in the area of infrasound investigations at ionospheric heights is given and some current problems are presented.
机译：声波具有将能量从地面传输到大气最上层的出色能力。在地面上，有许多永久的次声源，也有脉冲和/或偶发性源（例如，海浪，城市的次声和声音，雷电，地震，爆炸等）。次声波通过大气向上带走了大部分能量。向上的能量转移会带来什么后果？来自次声波各种来源的能量提供了什么高度的大气层？在大多数情况下，目前对这些问题的答案并不十分了解。监视次声波向高海拔传播的唯一机会是观察其对电离层等离子体的影响。不幸的是，大多数用于电离层探测的标准设备通常无法检测到次声范围内的等离子体波动。此外，次声波的形式在传播过程中由于非线性效应而强烈变化。然而，电离层的无线电多普勒方法的发展已经取得了进展。同时，已经开发出用于探测地面和地下爆炸的电离层方法。它的主要优点是通过短无线电波（即爆炸正上方的电离层的无线电探测）在近场区域内远程观察爆炸。由地面爆炸到电离层高度的爆炸所产生的声脉冲的传播理论已经比其他来源的理论发展得更好，并且已经通过实验进行了定量验证。综述了电离层高度次声研究领域的一些进展，并提出了一些当前的问题。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号