Collaborative Research: GEM--Magnetic Storm Modeling

合作研究：GEM--磁暴建模

• 批准号: 0101159
• 负责人: Richard Thorne
• 金额: $ 20万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0101159&HistoricalAwards=false
• 关键词: Collaborative; Research; GEM; Magnetic; Storm

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.

SHINE-GEM-CEDAR磁暴联合运动确定了三个磁暴作为磁暴动力学广泛和包容性研究的候选者。研究期间为1997年5月10日至11日、1998年9月24日至10月1日和1998年10月18日至31日。本研究将探讨三个风暴研究期间内磁层电场的时空演变。将电离层电场（利用电离层电动力学的等效测绘技术从地面观测确定）沿磁力线映射到磁层，从而获得风暴时电场的全球模型。电场对低纬度地区的穿透效应以及由此产生的内磁层的影响，将通过对与环电流-大气相互作用模型（RAM）计算的环电流散度相关的场向电流的详细分析来考虑。RAM模型还将进一步扩展，以包括高能O+离子的波粒散射效应。模型结果将与卫星数据进行比较。