Synthetic study of internal atmospheric variability using TIE-GCM

Abstract

In this study, we use the general circulation model TIE-GCM as well as synthetic lower boundary forcing to investigate the behavior of the lower Thermosphere Ionosphere (TI) system. The lower boundary forcing is synthetically generated, by atmospheric measurement data or corresponding model data to artificially mimic different atmospheric conditions, like sudden stratospheric warmings (SSW) or elevated stratopause (ES) and then used as input for TIE-GCM. The influence of these conditions on the TI system will be analyzed for different external forcing conditions, like high/low solar activity or geomagnetic quiet or active times. The goal of this study is to improve the understanding of the importance of the different (internal vs. external) driving mechanisms in the TI system.