Ionosphere/Thermosphere simulation based on realistic geomagnetic field, solar activity, and CO2 level during the past 12000 years

The long-term trend of ionosphere/thermosphere has been studied comprehensively in the past since Roble and Dickson [1989] pointed out that the ionosphere/thermosphere could be cooled by the greenhouse gas increase. The community has gained consistent underestanding of the climate in upper atmosphere based on simulation and data analysis. The main drivers are believed to be the variation of the geomagnetic field, CO2 level, and etc. In this study, we will conduct the ionosphere/thermosphere simulation for the past 12000 years using NCAR-TIEGCM model based on realistic geomagnetic field model and CO2 level. For validation purpose, we also conducted a 70 years simulation and made comparison with Wuhan Ionosonde observations. We will show preliminary simulation results in this presentation.