The causes of thermospheric composition variations during and after major geomagnetic storms

Wenbin Wang1, Alan Geoffrey Burns1, Yongliang Zhang2 and Jing Liu3, (1)High Altitude Observatory, Boulder, CO, United States, (2)JHU Applied Physics Laboratory, Laurel, MD, United States, (3)National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States