Tracer Ventilation Observations in the Cape Basin

This research article presents observations of tracer ventilation in the Cape Basin, specifically focusing on the dynamics associated with the Agulhas Current Retroflection. The study integrates high-resolution glider observations with satellite data to identify shear-driven instabilities at submesoscale fronts that enhance vertical diapycnal transport. It details how these processes lead to low apparent oxygen utilization and high levels of particulate organic carbon in the ocean's depths. The article discusses the significance of the Agulhas Current in global ocean circulation and its role in the Atlantic Meridional Overturning Circulation. It outlines the challenges of observing fine-scale mechanisms driving ventilation and tracer transport due to the required high spatial and temporal resolution. The findings contribute to understanding the vertical flux of tracers and the implications for ocean circulation and carbon cycling, emphasizing the need for further research in this dynamic region.