Quantifying Energetic Particle Precipitation over Canada

量化加拿大上空的高能粒子降水

• 批准号: RGPIN-2020-05219
• 负责人: Cully, Christopher
• 金额: $ 1.75万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=740460
• 关键词: Quantifying; Energetic; Particle; Precipitation; over

Above our atmosphere is a swirling sea of high-energy particles: the Van Allen radiation belts. Trapped by Earth's magnetic field, these particles are usually confined to near-Earth space, but natural events frequently force them down into our atmosphere. When that happens, they rain down in two bands centered on the magnetic poles; most of Canada lies under the northern band. This so-called "Energetic Particle Precipitation" (EPP) affects the space environment, the satellites travelling through it, and Earth's atmosphere. By draining near-Earth space of the high-energy particles that might otherwise hit satellites and degrade their electronics, EPP leads to a less hostile environment for our technology. But in the atmosphere, the rain of particles has many consequences, affecting radio propagation and changing the chemistry of the upper atmosphere. In particular, EPP-driven ozone depletion in the upper atmosphere may be relevant to Earth's radiative balance. Understanding EPP will require the work of many researchers across the globe. The proposed research will quantify the amount of EPP over Western Canada, aim to identify its natural causes and quantify its effects on the space and atmospheric environments. Research methods include the analysis of satellite, balloon-based and ground-based data in conjunction with appropriate computational and theoretical models. Although regionally-focussed, the proposed research attacks a question of global relevance, relating to magnetospheric effects on Earth's entire atmosphere.

高度上方是高能颗粒的旋转海：范艾伦辐射带。这些颗粒被磁场所困，通常局限于接近地球的空间，但是自然事件经常迫使它们进入我们的大气中。发生这种情况时，他们在以磁极为中心的两个带中下雨。加拿大大部分地区都位于北部乐队下。这种所谓的“能量颗粒降水”（EPP）影响了太空环境，卫星穿过它以及地球的大气层。通过排出可能击中卫星并降低电子产品的高能颗粒的近地空间，EPP为我们的技术带来了一个敌对的环境。但是在大气中，颗粒的降雨会产生许多后果，影响无线电传播并改变上层大气的化学性质。特别是，高层大气中的EPP驱动的臭氧耗竭可能与地球的辐射平衡有关。了解EPP将需要全球许多研究人员的工作。拟议的研究将量化加拿大西部EPP的数量，旨在确定其自然原因并量化其对空间和大气环境的影响。研究方法包括与适当的计算和理论模型结合使用卫星，基于气球和地面的数据的分析。尽管以区域为重点，但拟议的研究攻击了全球相关性的问题，这与磁层对地球整个大气的影响有关。