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

9876473 Clauer该项目旨在操作一个新的、更新的格陵兰冰帽磁力计阵列（MAGIC-II），并分析来自这些台站的数据以及来自其他地面和卫星仪器的数据。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年在格陵兰冰帽上安装一组磁强计站开始的合作的继续。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。最初的4站MAGIC阵列在1996年和1997年野外季节关闭并拆除。关闭这些台站的决定是基于积雪（约1米/年）、冬季运行依赖凝胶电池的电力系统的寿命以及计划关闭用于获得准确时基的欧米茄导航系统。目前的MAGIC II阵列是在1997年野外季节部署的，目的是利用改进的设备和减少的台站数目继续进行这些重要的测量。其中一个测站位于格陵兰中部GISP钻井现场，以提供西海岸和东海岸测站之间的连续性，另一个测站位于空军国民警卫队LC 130 Raven滑雪道（极地冰训练场- PITS），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Sondrstrom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MAGIC II台站的数据，结合格陵兰、加拿大、斯堪的纳维亚和南极的其他地磁数据，并与其他辅助地面和卫星数据协调，该项目将调查高纬度磁脉动和半球间极光椭圆和极冠的关系。这个项目的重点是了解各种电动电流系统，它将太阳风的能量和动量耦合到磁层和电离层

9876473ClauerThis project is directed toward the operation of a new, updated magnetometer array on the Greenland Ice Cap (MAGIC-II) and the analysis of the data from these stations together with data from other ground based and satellite instruments. This project is a cooperative effort between the University of Michigan and the Danish Meteorological Institute. The project is a continuation of a collaboration, which began, with the installation of an array of 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. The original 4-station MAGIC array was closed and removed during the 1996 and 1997 field seasons. The decision to close the stations was based upon the accumulation of snow (approximately 1 meter/year), the lifetime of the electrical power systems which rely on gel-cell batteries for winter operations, and the planned closure of the Omega navigation system which was used to obtain an accurate time base. The present MAGIC II array was deployed during the 1997 field season to continue these critical measurements using improved equipment, and a reduced number of stations. One station was placed at the central Greenland GISP drilling site to provide continuity between the west and east coast stations, and one station was placed at the Air National Guard LC130 Raven skiway (the Polar Ice Training Site - PITS) to provide a dense two-dimensional array for detailed current calculations. The MAGIC data in combination with data from the Greenland coastal stations and Sondrstrom incoherent scatter radar has 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 MAGIC II stations in combination with other Greenland, Canadian, Scandinavian, and Antarctic magnetic data, and coordinated with other ancillary ground based and satellite data, this project will investigate high latitude magnetic pulsations and interhemispheric auroral oval and polar cap relationships. The focus of this project is on understanding the various electrodynamic current systems, which couple energy and momentum from the solar wind to the magnetosphere and ionosphere