FN Archimer Export Format
PT J
TI Anthropogenic carbon pathways towards the North Atlantic interior revealed by Argo-O2, neural networks and back-calculations
BT 
AF Asselot, Remy
   CARRACEDO, Lidia
   Thierry, Virginie
   Mercier, Herle
   Bajon, Raphael
   Pérez, Fiz F.
AS 1:4;2:1;3:1;4:3;5:1;6:2;
FF 1:;2:PDG-ODE-LOPS-OH;3:PDG-ODE-LOPS-OH;4:;5:PDG-ODE-LOPS-OH;6:;
C1 University of Brest, Ifremer, CNRS, IRD, Laboratory of Spatial and Physical Oceanography (LOPS), 29280, Plouzané, France
   Institute of Marine Investigations (IIM, CSIC), 6 Eduardo Cabello Street, 36208, Vigo, Spain
   University of Brest, Ifremer, CNRS, IRD, Laboratory of Spatial and Physical Oceanography (LOPS), 29280, Plouzané, France
   University of Brest, Ifremer, CNRS, IRD, Laboratory of Spatial and Physical Oceanography (LOPS), 29280, Plouzané, France
C2 IFREMER, FRANCE
   IIM CSIC, SPAIN
   CNRS, FRANCE
   UBO, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
IF 16.6
TC 0
UR https://archimer.ifremer.fr/doc/00879/99049/108834.pdf
   https://archimer.ifremer.fr/doc/00879/99049/108835.pdf
   https://archimer.ifremer.fr/doc/00879/99049/108836.pdf
   https://archimer.ifremer.fr/doc/00879/99049/108837.pdf
LA English
DT Article
CR OVIDE
AB The subpolar North Atlantic (SPNA) is a region of high anthropogenic CO2 (Cant) storage per unit area. Although the average Cant distribution is well documented in this region, the Cant pathways towards the ocean interior remain largely unresolved. We used observations from three Argo-O2 floats spanning 2013-2018 within the SPNA, combined with existing neural networks and back-calculations, to determine the Cant evolution along the float pathways from a quasi-lagrangian perspective. Our results show that Cant follows a stepwise deepening along its way through the SPNA. The upper subtropical waters have a stratified Cant distribution that homogenizes within the winter mixed layer by Subpolar Mode Water formation in the Iceland Basin. In the Irminger and Labrador Basins, the high-Cant footprint (> 55 μmol kg−1) is mixed down to 1400 and 1800 dbar, respectively, by deep winter convection. As a result, the maximum Cant concentration is diluted (<45 μmol kg−1). Our study highlights the role of water mass transformation as a first-order mechanism for Cant penetration into the ocean. It also demonstrates the potential of Argo-O2 observations, combined with existing methods, to obtain reliable Cant estimates, opening ways to study the oceanic Cant content at high spatio-temporal resolution. 
PY 2024
PD FEB
SO Nature Communications
SN 2041-1723
PU Springer Science and Business Media LLC
VL 15
IS 1
UT 001180371400003
DI 10.1038/s41467-024-46074-5
ID 99049
ER

EF