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

这项提议旨在继续在格陵兰冰盖上运行一系列无人值守的自动磁力数据收集平台，并减少、分发和分析这些数据。这个神奇的阵列与格陵兰岛海岸上的磁力站相辅相成。魔磁台形成一个二维阵列，台站间隔约150公里。这些磁性测量的科学目标是与沿海站一起调查小规模传播的磁骚扰，这些扰动似乎是由移动的与电离层相互作用的丝状场向电流引起的。现在已经确定了这些系统的不同类别，场定向电流的起始点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变，具有密集的二维阵列尤为重要。格陵兰站与部署在加拿大的其他GEM资助的站相结合，使我们能够在足够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变。这些数据和拟议的研究对于理解从太阳风到磁层和电离层的能量和动量耦合过程的物理、磁层边界层的物理以及边界层现象到高纬度电离层的映射具有重要意义。

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.