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

格陵兰冰盖上磁力计阵列（MAGIC）的运行和多尺度海流系统的半球间研究

• 批准号: 0220735
• 负责人: Calvin Robert Clauer
• 金额: $ 52.49万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-10-01 至 2006-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0220735&HistoricalAwards=false
• 关键词: Operation; Magnetometer; Array; Greenland; Ice

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.

0220735克劳尔这项研究旨在继续运行格陵兰冰帽(MAGIC)上的磁强计阵列，并继续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。总体目标是探索一种新的方法，通过在格陵兰岛和南极洲东部部署的高时间和空间分辨率、磁性共轭的数字磁强计阵列来研究多尺度太阳风-磁层-电离层电动力学系统。拟议调查的主要新内容包括：(1)将现有格陵兰磁强计升级为1秒样本；(2)同时可视化半球间地球磁场变化，目的是调查磁层-电离层的多尺度耦合；(3)详细研究磁层电动力学形态从弱南向弱北的国际货币基金组织条件，反之亦然。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1991年在格陵兰冰盖上安装原始磁力仪测站开始的合作的延续。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。一个站点位于格陵兰岛中心峰会现场，以提供西海岸和东海岸站点之间的连续性，另一个站点位于空军国民警卫队LC130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数据与格陵兰海岸站和Sondrestrom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。使用格陵兰站的数据，结合加拿大、斯堪的纳维亚和南极的磁力数据，并与其他辅助的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形和极冠的关系。重点是了解将太阳风的能量和动量耦合到磁层和电离层的各种电动电流系统。