Ground Magnetometer Responses to Sudden Solar Wind Pressure Impulses Using a Global Magnetogram Technique

使用全球磁力图技术地面磁力计对突然的太阳风压力脉冲的响应

• 批准号: 1049403
• 负责人: Calvin Robert Clauer
• 金额: $ 29.93万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-02-01 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1049403&HistoricalAwards=false
• 关键词: Ground; Magnetometer; Responses; Sudden; Solar

The dynamic variations in the geospace environment driven by solar wind produce space weather that can impact technology in space and on the ground. The impulsive response of the magnetosphere to solar wind shocks is a unique and easily identifiable component of this weather. This investigation is a 3-year data-analysis and modeling effort aimed at providing a better understanding of this fundamental response, the so-called geomagnetic sudden impulse (SI) phenomenon. It will apply newly developed techniques to synthesize global ground magnetometer observations and will also compare these observations with the results of global magnetosphere simulations driven by observed solar wind and interplanetary magnetic field parameters. Special focus will be on "atypical" SI events. The results of this study are expected to provide a more complete and more global (all latitudes and local times) understanding of the fundamental response of Earth's magnetosphere to externally imposed impulsive changes.While formally submitted by Professor Clauer, the research effort has been conceived and formulated by Dr. Cai, an early career scientist at Virginia Polytechnic, who also will be leading and carrying out most of the work. Results from this research will inform our understanding in ways that improve our ability to model space weather, thereby enabling better predictions of space weather. As such, the results of this research effort are expected to be of direct benefit to society.

太阳能风能驱动的地理空间环境中的动态变化会产生太空天气，这可能会影响太空中的技术和地面上的技术。磁层对太阳能电击的冲动反应是这种天气的独特且易于识别的组成部分。 这项研究是一项为期3年的数据分析和建模工作，旨在更好地理解这种基本反应，即所谓的地磁突然冲动（SI）现象。 它将应用新开发的技术来综合全局地面磁力计观测值，还将将这些观测值与观察到的太阳风和星际磁场参数驱动的全局磁层模拟的结果进行比较。特别的重点将放在“非典型” SI事件上。预计这项研究的结果将提供更完整，更全球性的（所有范围和当地时代）对地球磁层对外部施加的冲动性变化的基本反应的理解。虽然克劳尔教授正式提交了研究工作，但研究工作是由弗吉尼亚州的早期职业科学家凯伊（Cai）构想和表现出来的。 这项研究的结果将以提高我们建模太空天气的能力的方式为我们的理解提供了信息，从而可以更好地预测太空天气。 因此，预计这项研究工作的结果将对社会产生直接利益。