Systematic Investigation of Alfvenic Magnetosphere-Ionosphere Coupling in the Dayside Magnetosphere

阳侧磁层中阿尔芬磁层-电离层耦合的系统研究

• 批准号: 2116971
• 负责人: Andreas Keiling
• 金额: $ 44.98万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2116971&HistoricalAwards=false
• 关键词: Systematic; Investigation; Alfvenic; Magnetosphere; Ionosphere

Aflven waves have been discovered in many astronomical plasmas, such as the Sun and the magnetospheres of planets including Earth, Jupiter, and Mercury. Alfven waves transport energy in the magnetosphere and accelerate and heat particles. This project will further our understanding of the global role Alfven waves play in the coupled solar wind-magnetosphere-ionosphere system, particularly on the dayside. The results are applicable to improving space weather forecasts, providing boundary conditions for future space missions. The project supports training and education of graduate students.The project will systematically investigate the dynamics of Alfven waves and the associated electromagnetic power as a global phenomenon in the solar wind-magnetosphere-ionosphere coupling as it occurs at the entry point to the dayside auroral acceleration region. A 12-year database from the Polar satellite will be used to conduct statistical studies, along with solar wind and interplanetary magnetic field data, geomagnetic indices, and the evolution of the storm phases. The goal is to quantify and predict the global Alfven wave contribution and dissipation under various scenarios on the dayside and test the results against simulations.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.

在许多天文等离子体中已经发现了Aflven波，例如太阳和包括地球，木星和水星在内的行星的磁层。阿尔芬波在磁层中传输能量，加速和加热粒子。该项目将进一步加深我们对阿尔芬波在太阳风-磁层-电离层耦合系统中所起的全球作用的理解，特别是在白天。研究结果可用于改进空间天气预报，为未来空间任务提供边界条件。该项目支持研究生的培训和教育，并将系统地研究阿尔芬波的动态和相关的电磁功率，这是太阳风-磁层-电离层耦合中的一种全球现象，因为它发生在白昼极光加速区的入口点。极地卫星的12年数据库将用于进行统计研究，沿着太阳风和行星际磁场数据、地磁指数和风暴阶段的演变。其目标是量化和预测全球阿尔芬波的贡献和消散在各种情况下的白昼和测试结果对simulations.This奖项反映了NSF的法定使命，并已被认为是值得通过评估使用基金会的智力价值和更广泛的影响审查标准的支持。