Collaborative Research: Energetic Particle Precipitation from the Magnetosphere and Effects on Ozone Dynamics in the Mesosphere and Stratosphere

合作研究：磁层高能粒子沉淀及其对中间层和平流层臭氧动力学的影响

• 批准号: 2123279
• 负责人: Michael Denton
• 金额: $ 53.4万
• 依托单位: SPACE SCIENCE INSTITUTE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-01-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2123279&HistoricalAwards=false
• 关键词: Collaborative; Research; Energetic; Particle; Precipitation

The awards to the Space Science Institute and to the University of Colorado in this collaborative project would measure and study the effects of energetic particle precipitation into the high latitude atmosphere. The project seeks to increase the understanding of how electrons and ions from the Earth's magnetosphere are scattered and subsequently are lost to the atmosphere. This topic is the subject of numerous studies involving satellite data, ground-based instrumentation, and complex theoretical models. The awards would support research aimed at investigating the causes of such energetic particle precipitation (EPP) in the magnetosphere, and also to study the consequences of such precipitation in the lower atmosphere. Specifically, the duration of the awards over three years would: use in-situ satellite data to determine when precipitation from the magnetosphere is likely to be occurring. The award would use satellite and balloon-based observations of the polar stratosphere and mesosphere to quantify the effects of the precipitation in the stratosphere and mesosphere on a case-by-case basis and also by using statistical analysis. These results would support the conduct of a dedicated experimental campaign of balloon-based ozone measurements in Finland to search for direct or indirect changes in the stratosphere during periods when precipitation is likely to be occurring. The research would also apply a complex theoretical model to reveal the physical/chemical causes of the precipitation to quantify the dominant physical and chemical processes responsible for such changes. The research would involve students at all levels of the project to contribute to the training of the next generation of scientists. The undergraduate and graduate students would gain experience of participating in a major international project, including an experimental campaign in which they would hold significant responsibilities. The project is relevant to all four Key Science Goals (KSGs) of the National Research Council Decadal Survey 2013, particularly KSG1 - Determine the origins of the Sun’s activity and predict the variations in the space environment and KSG2 - Determine the dynamics and coupling of Earth’s magnetosphere, ionosphere, and atmosphere and their response to solar and terrestrial inputsThe scientific rationale for the proposal is summarized in terms of two scientific objectives: (1) Determine and quantify when and where precipitation of high-energy electrons/ions from the magnetosphere is known to be occurring. this would be followed up by an effort to quantify the resulting changes in ozone in the polar stratosphere and mesosphere, and (2) Determine the physical and chemical pathways by which the precipitation effects are manifested via satellite observations, theoretical modeling, and in-situ observations.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在这个合作项目中，空间科学研究所和科罗拉多大学获得的奖项将测量和研究高纬度大气中高能粒子降水的影响。该项目旨在加深对地球磁层中的电子和离子如何散射并随后丢失到大气中的了解。该主题是涉及卫星数据、地面仪器和复杂理论模型的众多研究的主题。该奖项将支持旨在调查磁层中此类高能粒子降水（EPP）原因的研究，以及研究低层大气中此类降水后果的研究。具体而言，该奖项的期限为三年：使用现场卫星数据来确定磁层降水何时可能发生。该奖项将利用卫星和气球对极地平流层和中间层进行观测，并通过统计分析，逐案量化平流层和中间层降水的影响。这些结果将支持在芬兰开展专门的气球臭氧测量实验活动，以寻找可能发生降水期间平流层的直接或间接变化。 该研究还将应用复杂的理论模型来揭示降水的物理/化学原因，以量化造成这种变化的主要物理和化学过程。该研究将涉及该项目各个级别的学生，为下一代科学家的培训做出贡献。本科生和研究生将获得参与重大国际项目的经验，包括他们将承担重要责任的实验活动。该项目与国家研究委员会 2013 年十年期调查的所有四个关键科学目标 (KSG) 相关，特别是 KSG1 - 确定太阳活动的起源并预测空间环境的变化和 KSG2 - 确定地球磁层、电离层和大气的动力学和耦合及其对太阳和陆地输入的响应该提案的科学原理概括为两个科学依据 目标： (1) 确定并量化已知磁层中高能电子/离子沉淀发生的时间和地点。随后将努力量化极地平流层和中间层臭氧的变化，以及（2）通过卫星观测、理论建模和现场观测确定降水效应表现出来的物理和化学途径。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查进行评估，被认为值得支持 标准。