Oxygen is an important component in the subsurface because it significantly influences biogeochemical processes such as subsurface redox conditions, geochemical reactions rate, metabolic activity of aerobic microbes, and, consequently, the overall groundwater quality. The atmosphere represents an unlimited source of oxygen that triggers the migration of O2 toward terrestrial environments. The atmosphere also provides a sink for water vapor that drives water flux from the soil surface (i.e. soil water evaporation), leading to soil drying. This process influences the exchange of components like oxygen at the soil/atmosphere interface and control their migration mechanisms in the subsurface. This study aims to address the oxygen transport in the subsurface by considering the dynamics and interactions occurring in a coupled atmosphere/subsurface compartment.