The Labrador Sea is a site of deep convection where dense Labrador Sea Water (LSW) is formed in winter by intense atmospheric forcing, feeding the lower limb of the Atlantic Meridional Overturning Circulation (AMOC) (Feucher et al., 2019;Lozier et al., 2017; Schulze-Chretian & Frajka-Williams, 2018). This convection is known to be very sensitive to lateral exchange of freshwater and heat by modulating the stratification and influencing the restratification after the occurrence of convection (

The West Greenland Current (WGC; Figure 1) has a significant role in modulating the deep convection in the Labrador Sea (Li et al., 2021), where an important mode water -Labrador Sea Water (LSW), is produced. It is a strong current that is situated on the shelf break of west Greenland. It carries a significant amount of buoyant water, with low salinity water of Arctic origin at the surface, as well as the warm and salty Irminger water at intermediate depths (

Analyzing a high-resolution (1/60°) numerical model over 2008 to 2018, the inter-annual variability of the West Greenland Coastal Current (WGCC) on the shelf and West Greenland Current (WGC) at shelf break is presented. Both currents flow from Cape Farewell and extend to Davis Strait, with their model speeds and transports corresponding well with observations. The inter-annual variability of the WGCC and WGC near southwest Greenland are opposite, with the former declining while the latter strengthened, both by a speed change above 0.1 m/s. Both currents are predominantly buoyancy forced, but wind forcing becomes more dominant towards Davis Strait. The main exchanges from the two currents to interior occur between Cape Desolation and Fylla Bank, with net volume, freshwater, heat transport decreases of 1.4 Sv, 13 mSv, 36.7 TW. The freshwater transport of the WGC itself does not drop in between these sections, receiving freshwater from the WGCC to compensate for the losses to the basin interior. Thus, we see significant freshwater (83.1 mSv) and heat transports (70.7 TW) of the WGC remaining at Fylla Bank that reach the northern basin instead of being fluxed into the interior pof the Labrador Sea. This suggests that the exchange between the current system and the interior is more limited than previously thought, and most of the Greenland and Arctic melt reaches the northern Labrador Sea. Our results highlight the importance of resolving the WGCC and shelf processes.