A Dynamic Ground-Geomagnetic Field Model for the Southern Polar Cap

这是一个关于建立南极地区磁场变化模型的建议。在很宽的时间尺度范围内（从几分钟到几天和几个月），磁场是由磁层和极地电离层中的电流决定的，并对行星际介质的变化作出反应。磁场的测量是通过南极13个地点的磁力计提供的，并且可以通过在极光带的低纬度测量来补充。模型的两种输入类型是太阳风/IMF参数（代表行星际状态）和南极帽地磁指数（PCS）（代表区域磁层状态）。第一个将用于开发动态模型，首先是线性的，然后是非线性的实现。第二个将用于绘制PCS的有效面积，并检查磁子结构。这些方法的结果将与北极帽的结果进行比较，我们将继续以共轭研究的形式升级这种建模和预测方法。将两个极帽的动态模型与MHD模拟运行进行比较，以确定三维电流结构与其地面地磁特征的对应关系，并改进后者的时空特征的解释。这一提议的部分广泛影响是对正在为北半球开发的空间天气模型的改进。这部分是与芬兰气象研究所在电力研究所Sunburst项目背景下的合作。在教育和知识转移方面，模型开发的要素将用于综合空间天气模拟中心知识转移小组的讲座和研讨会。

This is a proposal to develop a model of the magnetic field variability in the Antarctic region. Over a wide range of time scales (fractions of minutes to days and months) the magnetic field is determined by currents in the magnetosphere and polar ionosphere and responds to changes in the interplanetary medium. Measurements of the field are provided through magnetometers at thirteen locations on the Antarctic, and can be complemented by lower-latitude measurements in the auroral zone. Two types of inputs to the model are the solar wind/IMF parameters, representing the interplanetary state, and the Southern Polar Cap geomagnetic index (PCS), representing the regional magnetospheric state. The first will be used to develop a dynamic model, first in a linear and then a nonlinear implementation. The second will be used to map the effective area of the PCS, and examine the magnetic substructure. Results from these methodologies will be compared against results from the Northern polar cap where we continue to upgrade such modeling and forecasting approaches, in the form of conjugacy studies. Comparisons of the dynamic models in the two polar caps with MHD simulation runs will be undertaken to determine the correspondence of the 3D current structure to its geomagnetic signature on the ground, and improve the interpretation of the latter's spatial and temporal features.Part of the broader impact of this proposal is an improvement to a space weather model being developed for the Northern hemisphere. This is in part a collaboration with the Finnish Meteorological Institute in the context of the Electric Power Research Institute's Sunburst project. In terms of education and knowledge transfer, elements from the model development will be used in lectures and seminars in the Knowledge Transfer group of the Center for Integrated Space Weather Modeling.