Interactions between Geomagnetic Activity and Sudden Stratosphere Warmings
The Earth's ionosphere and thermosphere (IT) region is influenced by solar and magnetospheric inputs from above, as well as upward-propagating waves from the lower atmosphere. Typically, the impact of the lower atmosphere on space weather and the IT region is studied under geomagnetically quiet conditions. This study, using SD-WACCM-X simulations, aims to demonstrate how strong lower-atmosphere forcing during sudden stratospheric warming (SSW) can modify storm responses in the IT region. Additionally, it will investigate the combined effects of moderate geomagnetic activity and lower-atmosphere forcing during SSW on mesoscale variations in the space weather region, utilizing newly developed high-resolution SD-WACCM-X simulations
Dr. Kumari, an ASP postdoctoral fellow at High Altitude Observatory affiliated with the National Center for Atmospheric Research, specializes in studying nonlinear wave dynamics within the upper atmosphere, covering regions from the equator to the poles. She earned her PhD in Physics from Clemson University in May 2021 and subsequently served as a postdoctoral researcher at Arizona State University's School of Earth and Space Exploration until December 2023. With eight years of expertise in handling observational and model-assimilated data, Dr. Kumari is skilled in the analysis of satellite temperature observations, ground-based scanning doppler imager data, and meteor radar observations pertaining to winds associated with tidal-wave-scale, planetary-wave-scale and traveling gravity-wave-scale phenomena. Currently, she is primarily interested in exploring whole-atmosphere model simulations to research the role of lower atmosphere wave coupling processes in connecting the dynamics of the lower and upper atmosphere during moderate to active geomagnetic conditions.