FN Archimer Export Format PT J TI Subpolar gyre decadal variability explains the recent oxygenation in the Irminger Sea BT AF Feucher, Charlène Portela, Esther Kolodziejczyk, Nicolas Thierry, Virginie AS 1:3;2:2;3:3;4:1; FF 1:;2:;3:;4:PDG-ODE-LOPS-OH; C1 Univ Brest, CNRS, Ifremer, IRD, LOPS, Plouzané, F-29280, France Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, 7001, Australia Univ Brest, CNRS, Ifremer, IRD, LOPS, Plouzané, F-29280, France C2 IFREMER, FRANCE UNIV TASMANIA, AUSTRALIA UBO, FRANCE SI BREST SE PDG-ODE-LOPS-OH UM LOPS IN WOS Ifremer UMR WOS Cotutelle UMR DOAJ copubli-france copubli-univ-france copubli-int-hors-europe IF 7.9 TC 5 UR https://archimer.ifremer.fr/doc/00804/91598/97544.pdf https://archimer.ifremer.fr/doc/00804/91598/97545.pdf LA English DT Article CR OVIDE AB Accurate monitoring of the long-term trend of oxygen content at global scale requires a better knowledge of the regional oxygen variability at interannual to decadal time scale. Here, we combined the Argo dataset and repeated ship-based sections to investigate the drivers of the oxygen variability in the North Atlantic Ocean, a key region for the oxygen supply into the deep ocean. We focus on the Labrador Sea Water in the Irminger Sea over the period 1991–2018 and we show that the oxygen solubility explains less than a third of the oxygen variability. In turn, the main drivers of the oxygen variability are due to changes in vertical mixing, advection, and other processes as revealed by Apparent Oxygen Utilization computation. Our findings revealed the key role of physical processes on the changes in oxygen variability and highlight the need of keeping a sustained monitoring of those processes to disentangle human-induced changes in oxygen from decadal natural variability. PY 2022 PD NOV SO Communications Earth & Environment SN 2662-4435 PU Springer Science and Business Media LLC VL 3 IS 1 UT 000882377200001 DI 10.1038/s43247-022-00570-y ID 91598 ER EF