Continuing Operation of a Magnetometer Array on the Greenland Ice Cap (MAGIC) to Investigate Propogating Ionospheric Current Systems

这一建议的目标是在格陵兰冰盖上运行一系列无人值守的自动磁数据收集平台，并对这些数据进行减少、分布和分析。我们建议将MAGIC阵列的数据经过简化和验证后，完全提供给有要求的人ıMAGIC =格陵兰冰盖上的磁力计阵列！MAGIC阵列补充了格陵兰岛海岸的地磁站，用于调查小规模的电离层电流系统。该阵列在格陵兰内陆的运行利用了格陵兰峰会上为格陵兰冰盖计划II （GISP II）建立的后勤支持。因此，可以用很少的费用建立和维持这些监测站。这些磁力站形成一个二维阵列，站距约为150公里。这些磁测量的科学目的是研究小规模的传播磁扰动，这种扰动似乎是由移动的丝状场向电流与电离层相互作用引起的。这些系统的不同类别现在已经被确定，场向流的起源似乎是磁层边界层和磁层顶区。为了解决这些电流系统的运动和结构演变，具有密集的二维阵列尤为重要。MAGIC站与现有的格陵兰岛西海岸和东海岸磁力计以及将部署在加拿大的磁力计相结合，使我们能够在一个足够的区域内观察这些现象，以确定它们的产生位置，并解决它们向尾部传播时的运动和空间演变。此外，MAGIC和沿海站的时间分辨率相对较高（15秒数据），将使以前受一分钟数据限制的调查成为可能。这些数据和提出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学非常重要。这项拟议中的研究是密歇根大学、SRI国际和丹麦气象研究所的合作成果。

This proposal is directed toward the 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. We propose to make the data from the MAGIC array, after reduction and verification, fully available to those who request it ıMAGIC = Magnetometer Arrary on the Greenland Ice Cap!. The MAGIC array compliments the magnetic stations on the coast of Greenland for the investigation of small-scale, ionospheric current systems. Operation of this array in the interior of Greenland takes advantage of the established logistical support for the Greenland Ice Sheet Program II (GISP II) at the Greenland summit. Thus, it is possible to establish and maintain these stations for a small cost. These magnetic stations form a two-dimensional array with station separation of about 150km. The scientific objective of these magnetic measurements is to investigate 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 the magnetospheric boundary layer and magnetopause region. 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 MAGIC stations in combination with the existing west coast and east coast Greenland magnetometers and with stations to be 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 they propagate tailward. Further the comparatively high time resolution (15-s data) of the MAGIC and coastal stations will permit investigations which were limited by the one minute data previously available. This data and the proposed research is important to understanding the physics of the processes that couple energy and momentum from the solar wind to the magnetosphere and ionosphere. The proposed research is a collaborative effort between the University of Michigan, SRI International, and the Danish Meteorological Institute.