Cessation of Labrador Sea Convection triggered by distinct fresh and warm (Sub)mesoscale Flows

Abstract By ventilating the deep ocean, convection in Labrador Sea plays a crucial role climate system. Unfortunately, mechanisms leading to cessation of and, hence, by which changing might affect remain unclear. In winter 2020, three autonomous underwater gliders sampled convective region and both its spatial temporal boundaries. Both boundaries are characterised higher sub-daily mixed-layer depth variability than region. At boundaries, buoyant intrusions–including eddies filaments–instead atmospheric warming primarily trigger restratification bringing buoyancy with comparable contribution from either fresh or warm intrusions. edges these intrusions, submesoscale instabilities, such as symmetric instabilities baroclinic seem contribute decay winter, enhanced lateral gradients correlated strong destabilising surface heat fluxes along-front winds. Consequently, conditions intrusions participate halting triggering while still destratifying. This study reveals freshwater anomalies narrow area offshore Current near region; this has received less attention more eddy-rich West Greenland Current, but is potential source closer proximity convection. Freshwater Arctic expected increase under climate, our findings suggest that they may play an active