[P-EM15] Study of coupling processes in solar-terrestrial system

[PEM15-06] New Theoretical Approaches for Coupling the Earth's Atmosphere-Ionosphere and Magnetosphere: Towards the Development of Bi-Directional Coupling Simulations

*Akimasa Yoshikawa^1,2 (1.Department of Earth and Planetary Sciences, Kyushu University, 2.International Research Center for Space and Planetary Environmental Science)

Keywords: global simulator integrating atmospheric general circulation models with magnetosphere simulators , Bi-Directional Coupling

In recent years, the development of general circulation models covering altitudes from the Earth's surface to the ionosphere has advanced rapidly, along with studies on the coupling between the Earth's atmosphere and ionosphere. Concurrently, there has been a surge in predictive research on the dynamics of the Earth's magnetosphere in response to solar activity, using magnetosphere-ionosphere coupling simulators linked to solar wind variations. The dynamics of the Earth's atmosphere and space plasma strongly intersect in the ionosphere region. Thus, to understand the evolutionary process of the Earth's atmosphere exposed to space, the development of a global simulator integrating atmospheric general circulation models with magnetosphere simulators is essential. However, there has yet to be a successful case of achieving bi-directional coupling between the atmosphere and magnetosphere. This presentation discusses the current issues with the coupling methods being debated and the methodologies necessary for more realistic phenomenon reproduction. In particular, it focuses on new coupling methods needed to realize latitudinal coupling connecting active atmospheric regions at the equator, polar regions, and low-latitude areas, including not just the atmospheric and ionospheric regions but also the magnetosphere.