Continuing Operation of a Magnetometer Array on the Greenland Ice Cap (MAGIC) to Investigate Propagating Ionospheric Current Systems for Geospace Environment Modeling

格陵兰冰盖上的磁力计阵列 (MAGIC) 持续运行，研究用于地球空间环境建模的传播电离层电流系统

• 批准号: 9501380
• 负责人: Calvin Robert Clauer
• 金额: $ 39万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-01 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9501380&HistoricalAwards=false
• 关键词: Continuing; Operation; Magnetometer; Array; Greenland

This proposal is directed toward the continued operation of an array of unattended, automatic magnetic data collection platforms on the Greenland ice cap and the reduction, distribution and analysis of these data. The MAGIC array complements the magnetic stations on the coasts of Greenland. The MAGIC magnetic stations form a two dimensional array with station separation of about 150 Km. The scientific objective of these magnetic measurements is to investigate, in conjunction with the coastal stations, small-scale propagating magnetic disturbances which appear to result from moving filamentary field-aligned currents interacting with the ionosphere. Different classes of these systems have now been identified and the origin of the field-aligned currents appears to be near the dayside magnetopause within the magnetospheric boundary layer. It is particularly important to have a dense two- dimensional array in order to resolve the motion and structural evolution of these current systems. The Greenland stations in combination with the other GEM funded stations deployed in Canada, permit us to observe these phenomena over a sufficient region as to identify their generation location and resolve their motion and spatial evolution as the propagate. These data and the proposed research are important to understanding the physics of the processes which couple energy and momentum from the solar wind to the magnetosphere and ionosphere, the physics of the magnetospheric boundary layer and the mapping of boundary layer phenomena to the high-latitude ionosphere.

该提案旨在格陵兰冰盖上一系列无人值守的自动磁数据收集平台的持续运行以及这些数据的减少、分发和分析。 MAGIC 阵列补充了格陵兰海岸的磁力站。 MAGIC 磁站形成二维阵列，站间距约为 150 公里。 这些磁测量的科学目标是与沿海站一起研究小规模传播磁扰动，这些扰动似乎是由移动的丝状场对齐电流与电离层相互作用引起的。 现在已经确定了这些系统的不同类别，并且场对准电流的起源似乎位于磁层边界层内的日侧磁层顶附近。 为了解决这些当前系统的运动和结构演化问题，拥有密集的二维阵列尤为重要。 格陵兰站与加拿大部署的其他 GEM 资助的站相结合，使我们能够在足够大的区域内观察这些现象，以确定它们的生成位置并解决它们在传播过程中的运动和空间演化。 这些数据和拟议的研究对于理解将太阳风的能量和动量耦合到磁层和电离层的过程的物理原理、磁层边界层的物理原理以及边界层现象到高纬度电离层的映射非常重要。