SM14A-07
Impacts of ionospheric outflow on storm-time F-region thermospheric mass density modeling
Monday, 14 December 2015: 17:22
2016 (Moscone West)
Binzheng Zhang1, Michael James Wiltberger2, Jiuhou Lei3, Wenbin Wang4, William Lotko5 and John Lyon1, (1)Dartmouth College, Hanover, NH, United States, (2)National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States, (3)USTC University of Science and Technology of China, Hefei, China, (4)High Altitude Observatory, Boulder, CO, United States, (5)Dartmouth College, Thayer School of Engineering, Hanover, NH, United States
Abstract:
Ionospheric outflow plays an important role during storm-time magnetosphere-ionosphere-thermosphere coupling. In this study, we use the coupled multifluid Lyon-Fedder-Mobarry (MFLFM) model and NCAR-Thermosphere-Ionosphere-Electrodynamic General Circulation Model (TIEGCM) to investigate the impacts of ionospheric outflow on the evolutions of high-latitude F-region thermospheric mass density during CME storms. Various physical processes that affect the energy input from the magnetosphere to ionosphere-thermosphere system are also implemented in the coupled global model including localized electromagnetic energy deposition, direct-entry cusp particle precipitation, broadband electron precipitation. The accuracy of modeling polar cap F-region thermospheric mass density during intense CME storms (kp>8) are estimated through event-based data-model comparisons (CHAMP/GRACE). These comparison studies are also used to investigate the relative importantce of various physical processes that relate to the coupling between the magnetosphere and high-latitude ionosphere-thermosphere.
