Modeling Radiation Belts and Ionospheric Outflows With the Space WeatherModeling Framework.

[摘要] The space environment is a complex system defined by regions of differing scales,characteristic energies, and physical processes. Moreover, each region is highly dependenton what is happening in the other regions. We utilize several models runningtogether under the Space Weather Modeling Framework (SWMF) to study thishighly interconnected system. Our endeavors are centered around two topics: First,we examine the impact of the global system on the radiation belts by integrating theFok Radiation Belt Environment model (RBE) into the SWMF. RBE is coupled tothe global magnetosphere component (represented by BATS-R-US) of the SWMF.The radiation belt model solves the convection-diffusion equation of the plasma inthe range of 10keV to a few MeV. In the SWMF, the BATS-R-US model providesthe time dependent magnetic field by efficiently tracing the closed magnetic fieldlines and passing the geometrical and field strength information to RBE at a regularcadence. Our second focus is on ionospheric outflow. We have developed the thePolar Wind Outflow Model (PWOM), and coupled it to various components of theSWMF. The PWOM solves the field-aligned gyro-tropic transport equations for H+, He+ , O+ along several field-lines in the altitude range of 250 km to a few EarthRadii. The resulting outflows are put into the global magnetosphere where theycan impact the composition and dynamics. For both topics, we discuss the couplingalgorithms and show results from simulating periods of steady IMF conditions andactive time periods

[发布机构] University of Michigan

[效力级别] Numerical Modeling

[关键词] Space Science;Numerical Modeling;Atmospheric;Oceanic and Space Sciences;Science;Space and Planetary Physics