Collaborative Research: GEM--Magnetic Storm Modeling

“阳光”-全球环境监测系统-CEDAR磁暴联合运动确定了三个磁暴，作为对磁暴动力学进行广泛和包容性研究的候选对象。 研究期为1997年5月10日至11日、9月24日、1998年9月25日和1999年9月24日。- 1998年10月1日和1998年10月18日至31日。 这项研究将审查在三个风暴研究期间内磁层电场的空间和时间演变。 将通过将电离层电场（使用电离层电动力学同化测绘技术从地面观测中确定）沿沿着磁场线映射到磁层，获得风暴时电场的全球模型。 将通过详细分析与环电流-大气相互作用模型（RAM）计算的环电流发散相关的场向电流，来考虑电场穿透到低纬度地区并因此穿透到内磁层的影响。 RAM模型也将进一步扩展到包括高能O+离子的波粒散射效应。 模型结果将与卫星数据进行比较。

Three magnetic storms were identified by the joint SHINE-GEM-CEDAR magnetic storm campaign as candidates for a broad and inclusive study of the dynamics of magnetic storms. The periods to be studies are 10-11 May 1997, 24 Sept. - 1 Oct. 1998, and 18-31 Oct. 1998. This study will examine the spatial and temporal evolution of the electric fields in the inner magnetosphere during the three storm study periods. A global model for the storm-time electric field will be obtained by mapping the ionospheric electric field (as determined from ground based observations using the Assimilative Mapping of Ionospheric Electrodynamic - AMIE - technique) into the magnetosphere along magnetic field lines. The effects of penetration of electric fields to lower latitudes and hence the inner magnetosphere will be incorporated by a detailed analysis of field-aligned currents associated with the divergence of the ring current computed by the Ring Current-Atmosphere interaction Model (RAM). The RAM model will also be further extended to include the effect of wave-particle scattering of energetic O+ ions. The model results will be compared with satellite data.