Impact of the Beaufort Gyre freshwater release on deepwater formation in the North Atlantic
Our simulations suggest that more BG-sourced freshwater (36 mSv) reached the North Atlantic during a release phase (1983-1995) of the BG freshwater content than during an accumulation phase (1996-2008), when most BG-sourced water recirculated within the Arctic basin. 70% of this BG-sourced freshwater routed through Davis Strait, while 30% routed through Fram Strait. This BG-sourced freshwater was able to bring down the surface salinity by 0.35 psu in the western Labrador Sea towards the end of the release phase. Although the historical release was not able to induce obvious impact during the phase of harsh winters with very strong convection in the early 1990s, the current BG freshwater content anomaly has almost doubled its historical maximum and a future release may become large enough to dampen the deepwater formation once in conjunction with mild winters.