Continuing Theoretical Studies of Dynamical Processes in the Ionosphere

电离层动力学过程的持续理论研究

• 批准号: 0533543
• 负责人: Robert Schunk
• 金额: $ 50万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0533543&HistoricalAwards=false
• 关键词: Continuing; Theoretical; Studies; Dynamical; Processes

Continuing theoretical studies of plasma and neutral gas transport in the Earth ionosphere are performed within the context of ionospheric coupling to the thermosphere, exosphere, plasmasphere, polar wind, and magnetosphere. Numerical simulations of mesoscale ionospheric and thermospheric structures, physics based models of ionospheric and plasmaspheric dynamics, and electrodynamic magnetosphere-ionosphere coupling models are further developed using model-data comparisons, participation in global measurement campaigns, and using new incoherent scatter radar experiment design. Five specific research investigations are carried out by a team of investigators. These include: 1) Space-time ambiguities in current high-latitude ionospheric dynamic data are removed using the new phased-array Advanced Modular Incoherent Scatter Radar (AMISR) facility at Poker Flat Alaska, to study plasma transport into the cusp and auroral boundary plasma blobs. AMISR at Resolute Bay Canada is used to investigate plasma patch morphology in the polar cap, to study sun-aligned arcs, and to study scintillation irregularities. 2) A data assimilation model is used in conjunction with global or regional collaborative data taking efforts to study ionospheric and thermospheric response to magnetic storms. 3) Simultaneous conjugate hemisphere coupling of the ionosphere and magnetosphere is studied using electrodynamic modeling. 4) Assimilative mapping of ionospheric electrodynamics is used to quantify ion and neutral outflows in the polar wind and as a manifestation of polar wind to exosphere coupling, and to quantify convection and particle precipitation patterns in the auroral zone and polar cap. 5) High spatial and temporal resolution mapping of the thermosphere is used to establish the extent of neutral gas upwelling in the cusp region.

在电离层偶联与热层，外层，等离子球，极风和磁层的背景下，对地球电离层的血浆和中性气体转运进行了持续的理论研究。 使用模型DATA比较，使用新的Incoherent散射雷达实验设计，进一步开发了中层离子层和热层结构的数值模拟，基于物理层和等离子体层动力学的模型以及电动力学磁层 - 电离层耦合模型。 一组调查人员进行了五项特定的研究调查。 其中包括：1）当前高纬度电离层动力学数据中的时空歧义使用新的分阶段阵列高级模块化不一致的散射雷达（AMISR）在阿拉斯加扑克的设施，以研究进入CUSP和AURORAL边界质等等离子体的等离子体传输。 加拿大肯定湾的AMISR用于研究极帽中的血浆斑块形态，研究阳光安装的弧并研究闪烁不规则。 2）数据同化模型与全球或区域协作数据结合使用，以研究电离层和热层对磁性风暴的响应的努力。 3）使用电动力模型研究了电离层和磁层的共轭半球偶联。 4）电离层电动力学的同化映射用于量化极风中的离子和中性流出，以及极风的表现到外层偶联，并量化极光区和极性帽中的对流和颗粒降水模式。 5）热层的高空间和时间分辨率映射用于确定尖端区域中中性气体上升的程度。