Collaborative Research: Impacts of Ion-Neutral Coupling on Ion Upflow and Outflow in the Polar Cusp

数值模拟是现代空间和大气科学的常用工具之一。计算机模拟和数值实验可以研究地球环境中的各种过程，并预测这些过程的结果。通过与实际观测数据的比较，可以调整数值模型并改进这一科学工具。许多著名机构正在努力创建并不断改进这些模型，使科学家能够利用它们进行研究。因此，这项研究的目标将有助于更好地了解太阳风-磁层相互作用和改进全球尺度耦合地球空间模型。这项建议的合作工作是调查地磁风暴期间电离层和热层的离子与中性原子之间相互作用的动力学和特征。研究的重点是这种相互作用如何影响离子的上流和流出。这项研究将包括一系列应用全球尺度地球空间数值模式的数值实验。耦合磁层电离层热层模型(CMIT)将与电离层/极地风模型(IPWM)相结合，分析热层变化对IPWM模拟的离子上行和流出的影响。CMIT模型是Lyon-Fedder-Mobarry(LFM)磁层MHD模型、高纬电动力学的磁层电离层交换(MIX)模型和热层电离层电动力学大气环流模型(TIEGCM)的组合。研究还集中于研究太阳风的特征和动力学如何影响尖端和裂隙中的离子-中性相互作用，并找到这种耦合的具体独特特征，这一特征可被地面仪器，例如高纬度的非相干散射雷达识别。

Numerical modeling is one of the popular tools of modern space and atmospheric sciences. Computer simulations and numerical experiments allow the investigation various processes in the Earth environment and predict outcomes of these processes. Comparison with actual observational data allows the tuning of numerical models and improving this scientific tool. Many noted institutions are working on creating and constantly improving these models allowing scientists to utilize them for their research. Thus, the objective of the research will allow better understanding of the solar wind - magnetosphere interaction and improving global-scale coupled geospace models. This recommended collaborative effort is to investigate the dynamics and features of the interaction between ions and neutral atoms of the ionosphere and thermosphere during geomagnetic storms. The research focuses on how this interaction affects the upflow and outflow of ions. This investigation will consist of a series of numerical experiments applying global-scale geospace numerical models. Coupled Magnetosphere Ionosphere Thermosphere model (CMIT) will be used in combination with Ionosphere / Polar Wind Model (IPWM) to analyze how thermospheric changes can affect the ion upflow and outflow simulated in the IPWM. CMIT model is a combination of the Lyon-Fedder-Mobarry (LFM) Magnetospheric MHD model, the Magnetosphere Ionosphere Exchange (MIX) model of high-latitude electrodynamics, and the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM). The research also concentrates on studying how the solar wind features and dynamics affect the ion-neutral interaction in the cusp and cleft and on finding specific distinctive signatures of this coupling, which could be recognized by ground-based instruments, for example, incoherent scatter radars at high latitudes.