Including Kinetic Ion Effects in the Coupled Global Ionospheric Outflow Solution

[摘要] We present a new expansion of the Polar Wind Outflow Model (PWOM) to include kinetic ions using the Particle-in-Cell (PIC) approach with Monte Carlo collisions. This implementation uses the original hydrodynamic solution at low altitudes for efficiency, and couples to the kinetic solution at higher altitudes to account for kinetic effects important for ionospheric out flow. The modeling approach also includes wave-particle interactions, suprathermal electrons, and an hybrid parallel computing approach combining shared and distributed memory parallelization. The resulting model is thus a comprehensive, global, model of ionospheric outflow that can be run efficiently on large supercomputing clusters. We demonstrate the model's capability to study a range of problems starting with the comparison of kinetic and hydrodynamic solutions along a single field line in the sunlit polar cap, and progressing to the altitude evolution of the ionconic distribution in the cusp region. The interplay between convection and the cusp on the global outflow solution is also examined. Finally, we demonstrate the impact of these new model features on the magnetosphere by presenting the first 2-way coupled ionospheric outflow-magnetosphere calculation including kinetic ion effects.

[发布日期] 2018-03-23

[学科分类] 地质物理学

[关键词] IONOSPHERIC CURRENTS;WAVE-PARTICLE INTERACTIONS;MAGNETOHYDRODYNAMIC FLOW;MAGNETOSPHERES;ATMOSPHERIC COMPOSITION;KINETICS;MONTE CARLO METHOD;ATMOSPHERIC MODELS;PARALLEL PROCESSING (COMPUTERS);COMPUTATION