An Updated Magnetometer Array on the Greenland Ice Cap (MAGIC-II) to Investigate Multi-Scale Ionospheric Current Systems

这项建议的目的是开发一个新的、经过更新的格陵兰冰帽磁力仪阵列（MAGIC-II），并结合其他格陵兰数据和南极共轭数据对这些数据进行分析。 该项目是密歇根大学和丹麦气象研究所之间的合作努力。 作为背景资料，1991年在格陵兰中部部署了一个磁力仪阵列，为格陵兰东部和西部沿海台站之间提供了宝贵的磁力仪测量数据。在1996年和1997年夏季实地季节，将分阶段关闭这一最初的MAGIC四个台站阵列。 MAGIC台站的数据与其他格陵兰磁力计相结合，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，包括移动对流涡旋、向极传播的DPY电流以及大规模对流的空间和时间演变。 因此，拟议在容易进入的地点部署一批新的最新设备。 这三个拟议地点是：Summit GISP，North GRIP（新的欧洲冰钻场），以及位于格陵兰岛最北方的气象站Kap Morris杰瑟普。 在包括POLAR和CLUSTER航天器在内的ISTP使命期间，继续为协调调查进行MAGIC数据收集尤为重要。 协调科学的独特机会，重点放在高纬度动态将是可能的。 格陵兰数据的持续获取也将受益于即将到来的任务，如（RSTED）和新一代DMSP航天器。 这些数据也将有助于北极和南极的其他仪器齐全的地面阵列。 研究将集中在各种高纬度电动力学现象，包括高纬度微脉动，大规模等离子体对流，高纬度电离层对IMF和太阳风的反应，以及亚暴。 此外，在图勒、诺德和拟议的新站卡普·莫里斯杰瑟普观测到的高纬度现象将与南极的几乎“共轭”的位置有关，以确定和了解两个半球之间极冠动态的对称性和不对称性。

This proposal is directed toward the development of a new updated magnetometer array on the Greenland ice cap (MAGIC-II) and the analysis of the data in conjunction with other Greenland data and with conjugate Antarctic data. This project is a cooperative effort between the University of Michigan and the Danish Meteorological Institute. By way of background, in 1991, an array of magnetometers (MAGIC) was deployed in central Greenland providing valuable magnetometer measurements between the Greenland eastern and western coastal stations. This original MAGIC array of four stations is being closed in a phased withdrawal during the 1996 and 1997 summer field seasons. The data from the MAGIC stations in combination with the other Greenland magnetometers have been critical in resolving the spatial and evolutionary characteristics of various dynamic ionospheric current systems, including traveling convection vortices, poleward propagating DPY currents, and the spatial and temporal evolution of the large scale convection currents. Thus, it is proposed to deploy a new array of updated equipment in easily accessed locations. The three proposed sites are: Summit GISP, North GRIP (the new European ice drilling site), and a meteorological station at the most northern point of Greenland, Kap Morris Jessup. It is particularly important to continue the MAGIC data collection for coordinated investigations during the ISTP mission which includes the POLAR and CLUSTER spacecraft. Unique opportunities for coordinated science with a focus upon high latitude dynamics will be possible. Continued acquisition of the Greenland data will also benefit from upcoming missions, such as (RSTED and the new generation of DMSP spacecraft. The data will contribute as well to the other richly instrumented ground arrays in both the Arctic and Antarctic. Studies will focus upon various high latitude electrodynamics phenomena, including high latitude micropulsations, large scale plasma convection, and the high latitude io nospheric responses to the IMF and solar wind, as well as to substorms. Also, high latitude phenomena observed at Thule, Nord, and the proposed new station Kap Morris Jessup, will be related to nearly "conjugate" locations in the Antarctic to determine and understand the symmetries and asymmetries of the polar cap dynamics between the two hemispheres.