GEM: Simulations of Diffuse Auroral Electron Transport and Precipitation in Realistic Model Storms and Substorms

本项目将建立一个漫射极光中电子沉降的时空变化模型。该项目将利用现有的基于物理的地球环电流模型，并增加由于俯仰角散射造成的电子损失。现有的模型将得到改进，以包括一个实际的磁场模型，而不是一个简单的偶极子模型，并有一个自洽的电场描述。模拟的电子沉淀将用于计算不同磁条件下的电离层电导率张量。该模型将提供给空间科学界，并将有助于开发地球空间环流模型（GGCM），这是地球空间环境建模（GEM）计划的主要目标之一。计算电离层电导的能力将有助于理解磁层与电离层的耦合。该项目将提高我们预测空间天气的能力，这将具有社会和经济效益。

This project will develop a model of the spatial and temporal variation of electron precipitation in the diffuse aurora. The project will utilize an existing, physics-based model of Earth's ring current and add electron losses due to pitch-angle scattering. The existing model will be improved to include a realistic magnetic field model as opposed to a simple dipole model and to have a self-consistent description of the electric field. The modeled electron precipitation will be used to calculate the ionospheric conductivity tensor for different magnetic conditions.The model will be made available to the space science community and will be useful in developing a Geospace General Circulation Model (GGCM) which is one of the main goals of the Geospace Environment Modeling (GEM) program. The ability to calculate ionospheric conductances will be useful in understanding the coupling of the magnetosphere to the ionosphere. The project will improve our predictive space weather capabilities, which will have societal and economic benefits.