SA013-02
Characteristics of Global Traveling Ionospheric Disturbance

Wednesday, 9 December 2020: 20:34
Virtual
Kevin H Pham, National Center for Atmospheric Research, Boulder, CO, United States, Roger H Varney, SRI International Menlo Park, Menlo Park, CA, United States, Binzheng Zhang, University of Hong Kong, Hong Kong, Hong Kong, Tong Dang, University of Science and Techonology, Hefei, China, Wenbin Wang, NCAR, HAO, Boulder, CO, United States, Kareem Sorathia, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, Shanshan Bao, Rice University, Physics and Astronomy, Houston, TX, United States, Dong Lin, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States and Viacheslav G Merkin, The Johns Hopkins University, Laurel, MD, United States
Recorded Presentation
Abstract:
Large-scale traveling ionospheric disturbances (LSTIDs) generated by high latitude joule heating from the convection electric field and auroral precipitation follow the geomagnetic field configuration. Once generated, LSTIDs are capable of propagating across the equator and into the other hemisphere but exhibit changes to their properties during their propagation. Using the current implementation of the Multiscale Atmosphere Geospace Environment (MAGE) model which couples the Thermosphere-Ionosphere Electrodynamic General Circulation Model (TIEGCM) of the T-I system, the Grid Agnostic MHD for Extended Research Applications (GAMERA) global MHD magnetosphere model, and the Rice Convection Model (RCM) of the ring current together, we simulate geomagnetic activity producing LSTIDs globally. The simulations agree well with CHAMP satellite in-situ and ground-based GPS TEC observations. For each hemisphere, we calculate the wave characteristics and shape of the TID wavefronts as they propagate and contrast the characteristics of the LSTIDs once they pass the equator.
<< Previous Abstract | Next Abstract >>