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

格陵兰冰盖磁力计阵列（MAGIC）的运行和多尺度海流系统的研究

• 批准号: 9876473
• 负责人: Calvin Robert Clauer
• 金额: $ 44.26万
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-04-15 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9876473&HistoricalAwards=false
• 关键词: Operation; Magnetometer; Array; Greenland; Ice

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

9876473克劳尔该项目旨在格陵兰冰帽(MAGIC-II)上新的、更新的磁力计阵列的运行，以及分析来自这些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的合作项目。该项目是始于1991年在格陵兰冰盖上安装磁力仪测站阵列的合作的延续。格陵兰中部的自主磁力仪系统为格陵兰西海岸和东海岸站之间的磁扰动提供了有价值的中间变化量度。最初的4站魔术阵列在1996年和1997年的野外赛季期间被关闭和移除。关闭空间站的决定是基于积雪(约1米/年)、依靠凝胶电池进行冬季作业的电力系统的寿命以及用于获得准确时基的Omega导航系统的计划关闭。目前的MAGIC II阵列是在1997年外地季节部署的，以使用改进的设备和减少的站点数量继续进行这些关键测量。一个站点被放置在格陵兰岛中部的GISP钻探场地，以提供西海岸和东海岸站点之间的连续性，另一个站点被放置在空军国民警卫队LC130乌鸦滑雪道(极地冰训练场地-坑)，以提供密集的二维阵列，用于详细的海流计算。MAGIC数据与格陵兰沿岸站和Sondrstrom非相干散射雷达的数据相结合，对于解析各种动态电离层电流系统的空间和演化特征至关重要，这些系统包括行进对流涡旋、向极地传播的DPY电流以及大尺度对流系统从一种状态向另一种状态的转变。利用MAGIC II站的数据，结合格陵兰、加拿大、斯堪的纳维亚和南极的其他磁数据，并与其他辅助的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形和极冠的关系。这个项目的重点是了解各种电动力学电流系统，它们将太阳风的能量和动量耦合到磁层和电离层。