Global Estimation of Dayside-Merging and Nightside-Reconnection in the Expanding/Contracting Polar Cap Paradigm

扩张/收缩极地帽范式中白天合并和夜间重新连接的全局估计

• 批准号: 0541913
• 负责人: Thomas Sotirelis
• 金额: --
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-02-01 至 2009-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0541913&HistoricalAwards=false
• 关键词: Global; Estimation; Dayside; Merging; Nightside

The amount of open flux in the polar cap is an important parameter characterizing the state of the magnetosphere. This is a one-year project with the main objective to develop and validate techniques based on measurements from the Super Dual Auroral Network (SuperDARN) to provide estimates hereof routinely and with high time resolution. Such measurements would be a great new asset for a variety of studies of magnetospheric dynamics. The proposed techniques will be implemented and tested in a number of in-depth case studies. The case studies are designed to investigate the relation between the amount of open flux and the state of ionospheric convection. These results will provide basic tests of the expanding-contracting polar cap paradigm, which is one of the central paradigms in our current understanding of magnetospheric dynamics.

极帽中的开放通量是表征磁层状态的重要参数。这是一个为期一年的项目，主要目标是开发和验证基于超级双极光网络 (SuperDARN) 测量的技术，以定期提供高时间分辨率的估计。这样的测量对于磁层动力学的各种研究来说将是一个巨大的新资产。所提出的技术将在许多深入的案例研究中得到实施和测试。案例研究旨在研究开放通量量与电离层对流状态之间的关系。这些结果将为膨胀-收缩极冠范式提供基本测试，这是我们当前理解磁层动力学的核心范式之一。