Progresses and Challenges to specifying the I-T system during weak storms
Abstract
Combining recently developed capabilities in both observations and simulations, we will focus on the multi-scale forcing and its influence on the ionosphere and Thermosphere (I-T) system during weak or moderate storm events (CIR and CME events) near solar minimum. When solar irradiance inputs are relatively low the relative significance of other geomagnetic forcing and atmospheric waves to the I-T system is enhanced. Specifically, observations from both ground (SuperDARN, ASI, ISR and GNSS) and satellites (DMSP, AMPERE, Swarm) will be utilized either to improve the specification of the electrodynamic forcing in the general circulation model (GCM) or to compare with the I-T variations from model outputs. First, the meso-scale phenomena (i.e. bursty flows, patches and troughs) and the related physical processes will be investigated closely by taking advantage of the high-resolution observations and simulations. Meanwhile, the significance of accurate large-scale specification to the storm-time I-T system responses will be examined, including the effects of soft electrons, substorms, inter-hemispheric asymmetry and preconditioning. This paper will discuss the progresses we made and the challenges we face if we are to further improve the understanding of the I-T disturbances from both observational and modeling aspects.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2021
- Bibcode:
- 2021AGUFMSA25D1995D