The complex interaction between the solar wind and the Earth's geospace environment is a fundamental driver of space weather. This session focuses on the transfer of mass, energy, and momentum across the bow shock, magnetosheath, and magnetopause, and the resulting manifestations in the magnetosphere and ionosphere. Extreme conditions, such as Coronal Mass Ejections (CMEs) and High-Speed Streams (HSS), significantly enhance these coupling processes. We invite contributions that explore the formation of foreshock transients, magnetosheath pressure pulses, and steady/transient magnetic reconnection, as well as their ionospheric counterparts, including magnetic impulse events, traveling convection vortices (TCVs), and intensified auroral borealis/australis.

A deeper understanding of these dayside coupling mechanisms and how they evolve into global disturbances is essential for improving predictive space weather models. We particularly encourage studies that integrate multi-spacecraft observations and ground-based instrument networks with advanced theoretical models, global simulations, and AI/Machine Learning-based approaches.