Statistical Spectrum Estimation and Solar Gravity Modes

统计光谱估计和太阳重力模式

• 批准号: 250268-2013
• 负责人: Thomson, David
• 金额: $ 2.11万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=547567
• 关键词: Statistical; Spectrum; Estimation; Solar; Gravity

We propose to continue studying the connection between normal modes of the Sun, propagation in space plasmas, and the effects of these modes on Earth. Our 1995 discovery of these modes has snowballed from a curiosity in scientific data, to dropped calls on cellular phone systems, and most recently, to the identification of a solar gravity mode (g-mode) in high-energy electrons in Earth's magnetosphere. This, combined with theory and simulations, is gradually changing peoples' views of how propagation in space plasmas works and, with it, views of solar-terrestrial coupling. A major task of the next few years will be to continue the basic scientific research including refinements in our statistical characterization of the modes, their propagation properties, and more intensive study of the mechanisms that couple them into various terrestrial systems. For example, we know that these modes are responsible for a large fraction of the dropped calls in cellular phone systems, but do not know the atmospheric or ionospheric physics responsible. I anticipate that the work on g-modes will lead to eventual improvements in space weather forecasts with applications ranging from geological prospecting, to air traffic control, to stability of power grids.

我们建议继续研究太阳的正常模式、在空间等离子体中的传播以及这些模式对地球的影响之间的联系。我们1995年对这些模式的发现，从对科学数据的好奇，到手机系统的通话中断，以及最近在地球磁层高能电子中发现的太阳引力模式(g模)，都像滚雪球一样迅速发展。这与理论和模拟相结合，正在逐渐改变人们对空间等离子体传播如何工作的看法，以及随之而来的日地耦合的看法。未来几年的主要任务将是继续进行基础科学研究，包括改进我们对模式及其传播特性的统计表征，以及更深入地研究将它们耦合到各种陆地系统的机制。例如，我们知道这些模式是移动电话系统中大部分掉话的原因，但不知道是大气或电离层物理造成的。我预计，G模式的工作最终将导致空间天气预报的改进，应用范围从地质勘探到空中交通管制，再到电网的稳定性。