Electric fields and currents and their effects in the near Earth space

电场和电流及其对近地空间的影响

• 批准号: 183564-2011
• 负责人: Koustov, Alexandre
• 金额: $ 2.04万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=507426
• 关键词: Electric; fields; currents; their; effects

A continuous stream of charged particles from the Sun, the solar wind, carries an embedded interplanetary magnetic field which couples with the Earth's magnetic field to create a cavity called the magnetosphere. The Earth's magnetosphere accumulates particles, some of which precipitate into the upper atmosphere leading to beautiful auroral displays at high latitudes. Precipitating particles and solar illumination create a conducting layer at heights of ~100-300 km called the ionosphere. Electric fields are also established within the magnetosphere; they strongly control particle motion. Magnetospheric electric fields are mapped/transmitted via currents flowing along magnetic field lines into the high-latitude ionosphere. Electric fields are thus involved in various processes in the near Earth environment. Knowledge of the spatial and temporal distribution of the electric fields and currents in the Earth's magnetosphere and ionosphere is fundamentally important for developing physics-based electrodynamical models of the near Earth's space. Such models attempt to predict strong particle precipitation events that are hazardous for humans in space, for the operation of electrical power grids and pipelines on the ground, and for wireless communication. The proposed research program is aimed at studying electric fields and currents in the Earth's ionosphere and their effects. This can be accomplished on a global scale and with a temporal resolution on the order of one minute. Through analysis of data collected by the Super Dual Auroral Radar Network, by versatile and powerful incoherent scatter radars (including the forthcoming Canadian radar at Resolute Bay) and by upcoming international satellite missions with strong Canadian participation (e-POP, SWARM and ORBITALS), key questions in space physics will be addressed, such as the mechanisms of energy deposition to the high-latitude ionosphere, energy penetration to middle latitudes and the effects of electric fields and currents on the ionosphere and operation of radio communication systems in the High Arctic.

来自太阳（太阳风）的连续流动颗粒带有一个嵌入的星际磁场，该磁场与地球的磁场结合起来，形成一个称为磁层的空腔。 地球的磁层积聚了颗粒，其中一些颗粒沉淀到高纬度的高纬度上，导致精美的极光显示器。沉淀颗粒和太阳照明在约100-300 km的高度上创建了一个称为电离层的导电层。 电场也在磁层内建立。他们强烈控制粒子运动。磁层电场通过沿磁场线流入高纬度电离层的电流进行映射/传输。因此，电场参与了近地球环境中的各种过程。了解地球磁层和电离层中电场和电流的空间和时间分布对于开发近地球空间的基于物理的电动力学模型至关重要。 这样的模型试图预测对人类在太空中危害的强粒子降水事件，用于在地面上的电力网格和管道的运行以及无线通信。拟议的研究计划旨在研究地球电离层中的电场和电流及其影响。这可以在全球范围内完成，并在一分钟内以时间分辨率完成。 Through analysis of data collected by the Super Dual Auroral Radar Network, by versatile and powerful incoherent scatter radars (including the forthcoming Canadian radar at Resolute Bay) and by upcoming international satellite missions with strong Canadian participation (e-POP, SWARM and ORBITALS), key questions in space physics will be addressed, such as the mechanisms of energy deposition to the high-latitude ionosphere, energy penetration to middle降低的电场和电流对高北极射线通信系统电离层的影响。