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.

太阳风驱动的地球空间环境的动态变化会产生空间天气，从而影响太空和地面技术。磁层对太阳风冲击的脉冲响应是这种天气的一个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响应，即所谓的地磁突发脉冲 (SI) 现象。 它将应用新开发的技术来综合全球地面磁力计观测结果，并将这些观测结果与由观测到的太阳风和行星际磁场参数驱动的全球磁层模拟结果进行比较。将特别关注“非典型”SI 事件。这项研究的结果预计将提供对地球磁层对外部脉冲变化的基本响应的更完整和更全球性的理解。虽然由克劳尔教授正式提交，但这项研究工作是由弗吉尼亚理工学院的早期职业科学家蔡博士构思和制定的，他也将领导和开展大部分工作。 这项研究的结果将有助于我们提高对太空天气建模的能力，从而更好地预测太空天气。 因此，这项研究工作的结果预计将直接造福于社会。