NSWP: A New Empirical Model for Prediction of Ground-Level Geomagnetic Perturbations

NSWP：预测地面地磁扰动的新经验模型

• 批准号: 0817751
• 负责人: Daniel Weimer
• 金额: $ 36万
• 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: 2009
• 资助国家: 美国
• 起止时间: 2009-02-01 至 2013-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0817751&HistoricalAwards=false
• 关键词: NSWP; New; Empirical; Model; Prediction

This is a three-year effort to produce models of the high latitude ground magnetic field variations as function of the solar wind and IMF conditions. The work uses the same technique of spherical harmonic expansion that has been utilized in the existing ?Weimer models? of ionospheric electrodynamics. In the new model the scalar magnetic potential will be matched to ground based magnetometer measurements. First, a static baseline model will be developed. Next, dynamical information where the magnetic field is perturbed due to sudden pressure pulses in the solar wind will be included through a superposed epoch analysis, equivalent to a disturbance-response classification process. Datasets from the Canadian CARISMA chain, the Greenland Chain, and the Virtual Global Magnetic Observatory residing at Virginia Tech will be used together with solar wind data from the ACE satellite. The new models will have widespread utility within the space science community and also has the potential to contribute directly to improved space weather forecasts and/or nowcasts in the near-term future.

这是一项为期三年的工作，目的是制作高纬度地面磁场随太阳风和国际货币基金组织条件变化的模型。 这项工作使用相同的技术，球谐膨胀，已利用现有的？威玛模特？电离层电动力学。在新模型中，标量磁势将与地面磁力计测量值相匹配。 首先，将建立一个静态基线模型。 接下来，动态信息的磁场被扰动，由于太阳风中的突然压力脉冲将包括通过叠加的历元分析，相当于一个干扰响应分类过程。 来自加拿大CARISMA链、格陵兰链和设在弗吉尼亚理工大学的虚拟全球磁力观测台的数据集将与ACE卫星的太阳风数据一起使用。 这些新模型将在空间科学界广泛使用，并有可能直接有助于改进近期的空间气象预报和（或）临近预报。