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  • Ionospheric electric field variations during a geomagnetic storm . . .
    global magnetosphere MHD code [Lyon et al , 2004] with the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) [Richmond et al ,1992] These two codes are coupled by exchanging parameters across their interfaces through a magnetosphere-ionosphere (M-I) coupler module A detailed description of the cou-
  • TIE-GCM 2. 0 | CCMC - NASA
    Inputs for Weimer model: Interplanetary magnetic field, By and Bz, in nT Solar wind density and speed, ρ and v, in cm-3 and km s-1 Inputs for lower boundary: Diurnal and semi-diurnal migrating tides, specified by the GSWM
  • Modeling the ionosphere-thermosphere response to a geomagnetic storm . . .
    General Circulation Model (TIEGCM) model (Wang et al 2008) Using the magnetospheric input from the LFM MHD model, CMIT can produce penetration of high-latitude electric fields near the magnetic equator (Wang et al 2008), storm-time positive and negative responses of total electron content (Leietal 2008; Wang et al 2010), and realistic
  • Altitude extension of the NCAR-TIEGCM (TIEGCM-X) and evaluation
    In this study, the National Center for Atmospheric Research Thermosphere-Ionosphere-Electrodynamics General Circulation Model (NCAR-TIEGCM) was successfully extended upward by four scale
  • The effects of Corotating interaction region High speed stream storms . . .
    Before describing these studies we will describe the data sets and models that we have used In the next section we will look at two versions of the NCAR-TIEGCM, one run using a Heelis et al (1982) high latitude ion convection pattern and one run using a Weimer (2005) pattern The data used will also be summarized there
  • Altitude Extension of the NCAR-TIEGCM (TIEGCM-X) and Evaluation
    In this study, the National Center for Atmospheric Research Thermosphere-Ionosphere-Electrodynamics General Circulation Model (NCAR-TIEGCM) was successfully extended upward by four scale heights from 400–600 km to 700–1,200 km depending on solar activity, named TIEGCM-X
  • Importance of Regional‐Scale Auroral Precipitation and Electrical Field . . .
    We incorporate the Defense Meteorological Satellite Program (DMSP) Special Sensor Ultraviolet Spectrographic Imager (SSUSI) auroral precipitation maps, which capture the regionalscale features into TIEGCM and add subgrid electric eld variability in the regions with ‐ fi strong auroral activity
  • The NCAR TIE-GCM: - hao. ucar. edu
    • Significant new feature is inclusion of the Weimer high- latitude potential model, using solar wind IMF input • High-resolution version (2 5° x 2 5° x H 4) is also in test • Other key research developments include: • Lower boundary conditions: — Seasonal spatial variation of lower boundary eddy diffusion


















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