Troposphere-Ionosphere Coupling via Atmospheric Gravity Waves

通过大气重力波的对流层-电离层耦合

基本信息

批准号：
1341557
负责人：
Vadym Paznukhov
金额：
$ 86.48万
依托单位：
Boston College
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-04-01 至 2019-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1341557&HistoricalAwards=false
关键词：
Troposphere Ionosphere Coupling via Atmospheric

项目摘要

In our layered atmosphere, gravity (or internal) waves are quasi-periodic disturbances most familiar as the wave-like cloud patterns, such as observed in the lee of mountain ranges. This project seeks to experimentally investigate the role of the atmospheric gravity waves in ionosphere-troposphere coupling. In particular, the dynamics of plasma density irregularities in the ionospheric F region, and the connection of these irregularities with atmospheric gravity waves will be investigated. The investigation is to take place in Antarctica as: 1) Large numbers of gravity waves may be observed there, and 2) The electromagnetic background there is quiet, important for detection of radio signals to be observed in this study. To detect the density irregularities a HF receiver and transmitter will be placed at two different locations in Antarctica, probing the ionosphere along the passage between these two points. Numerical modelling will be used to describe parameters of the troposphere below the ionospheric path of the HF signal. The HF signal will give information about density irregularities, and the numerical model will give information about gravity waves in the troposphere. By comparing information of numerical model and from HF observations the investigators will be able to make conclusions about simultaneous occurrences of irregularities in the ionospheric plasma and gravity waves.

在我们分层的大气中，重力（或内部）波是最熟悉的准周期性干扰，如波浪状的云图案，例如在山脉的Lee中观察到的。该项目旨在实验研究大气重力波在电离层 - 对流圈耦合中的作用。特别是，将研究血浆密度不规则的动力学在电离层F区域中，以及这些不规则性与大气重力波的联系。该研究将在南极洲进行：1）在那里可以观察到大量的重力波，以及2）电磁背景是安静的，对于在本研究中观察到无线电信号很重要。为了检测密度不规则性，HF接收器和发射器将放置在南极洲的两个不同位置，从这两个点之间的通道探测电离层。数值建模将用于描述HF信号的电离层路径下方的对流层的参数。 HF信号将提供有关密度不规则的信息，数值模型将提供有关对流层重力波的信息。通过比较数值模型的信息和HF观察结果，研究者将能够得出关于电离层等离子体和重力波中不规则发生的同时出现的结论。