Operation of the Magnetometer Array on the Greenland Ice Cap (MAGIC) and Interhemispheric Investigations of Multi-Scale Current Systems

0220735 Clauer这项研究的目的是继续在格陵兰冰帽上运行磁强计阵列（MAGIC），并继续分析这些台站的数据以及其他地面和卫星仪器的数据。总体目标是探索一种新的方法，通过在格陵兰和东南极部署的高时空分辨率磁共轭数字磁强计阵列，研究多尺度太阳风-磁层-电离层电动力学系统。拟议调查的主要新内容包括：（1）将现有格陵兰磁力计升级为1秒采样，（2）同时显示半球间地面地磁场变化，目的是调查多尺度磁层-电离层耦合，以及（3）详细研究了磁层电动力学形态从弱南向IMF到弱北向IMF的转变，亦然该项目是密歇根大学和丹麦气象研究所之间的合作努力。该项目是1991年在格陵兰冰盖上安装最初的磁力计站时开始的合作的继续。格陵兰中部的自主磁力计系统提供了格陵兰西海岸和东海岸台站之间磁扰动的宝贵中间变差计测量。其中一个监测站位于格陵兰岛中部的峰顶，以提供东西海岸监测站之间的连续性，另一个监测站位于空军国民警卫队LC 130乌鸦滑雪道，以提供密集的二维阵列，用于详细的海流计算。MAGIC数据与来自格陵兰沿海台站和Sondrestrom非相干散射雷达的数据相结合，对于解决各种动态电离层电流系统的空间和演变特征至关重要，这些动态电离层电流系统包括移动的对流涡旋、向极传播的DPY电流以及大规模对流系统从一种状态向另一种状态的转变。利用格陵兰站的数据，结合加拿大、斯堪的纳维亚和南极的磁力数据，并与其他辅助地面和卫星数据协调，这项工作将调查高纬度磁脉动和半球间极光椭圆和极冠的关系。重点是了解各种电动电流系统，耦合能量和动量从太阳风的磁层和电离层。

0220735ClauerThis research is directed toward the continuation of the operation of the Magnetometer Array on the Greenland Ice Cap (MAGIC) and the continued analysis of the data from these stations together with data from other ground based and satellite instruments. The overarching objective is to explore a new approach to investigate the multi-scale solar wind - magnetosphere - ionosphere electrodynamic system through high temporal and spatial resolution, magnetically conjugate arrays of digital magnetometers deployed in Greenland and Eastern Antarctica. Major new elements of the proposed investigation include: (1) the upgrade of existing Greenland magnetometers to 1-second samples, (2) simultaneous visualization of interhemispheric ground geomagnetic field variations with the goal to investigate multi-scale magnetosphere-ionosphere coupling, and (3) the detailed study of the transition in magnetospheric electrodynamic morphology from weakly southward IMF to weakly northward IMF conditions and vice versa. This project is a cooperative effort between the University of Michigan and the Danish Meteorological Institute. The project is a continuation of a collaboration that began with the installation of the original magnetometer stations on the Greenland ice cap in 1991. The autonomous magnetometer systems in central Greenland provided valuable intermediate variometer measurements of magnetic perturbations between the Greenland west and east coast stations. One station is located at the central Greenland summit site to provide continuity between the west and east coast stations, and one station was placed at the Air National Guard LC130 Raven skiway to provide a dense two-dimensional array for detailed current calculations. The MAGIC data in combination with data from the Greenland coastal stations and Sondrestrom incoherent scatter radar have been crucial in resolving the spatial and evolutionary characteristics of various dynamic ionospheric current systems, including traveling convection vortices, poleward propagating DPY currents, and the transition of large scale convection systems from one state to another. Using data from the Greenland stations in combination with Canadian, Scandinavian, and Antarctic magnetic data, and coordinated with other ancillary ground based and satellite data, this effort will investigate high latitude magnetic pulsations and interhemispheric auroral oval and polar cap relationships. The focus is on understanding the various electrodynamic current systems that couple energy and momentum from the solar wind to the magnetosphere and ionosphere.