FN Archimer Export Format
PT J
TI Oxygen budget for the north-western Mediterranean deep-convection region
BT 
AF Ulses, Caroline
   Estournel, Claude
   Fourrier, Marine
   Coppola, Laurent
   Kessouri, Faycal
   Lefèvre, Dominique
   Marsaleix, Patrick
AS 1:1,2;2:1;3:3;4:3;5:2,4;6:5;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Laboratoire d’Etudes en Géophysique et Océanographie Spatiales (LEGOS), Université de Toulouse, CNES, CNRS, IRD, UPS, Toulouse, France
   Laboratoire d’Aérologie (LA), Université de Toulouse, CNRS, UPS, Toulouse, France
   Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche (LOV), 06230 Villefranche-sur-Mer, France
   Southern California Coastal Water Research Project, Costa Mesa, CA, USA
   Aix-Marseille Université, Mediterranean Institute of Oceanography (MIO), 13288 Marseille Cedex 9, France
C2 LEGOS, FRANCE
   UNIV TOULOUSE, FRANCE
   UNIV SORBONNE, FRANCE
   SCCWRP, USA
   UNIV AIX MARSEILLE, FRANCE
IN DOAJ
IF 5.092
TC 12
UR https://archimer.ifremer.fr/doc/00642/75453/76270.pdf
   https://archimer.ifremer.fr/doc/00642/75453/81980.pdf
LA English
DT Article
CR DEWEX-MERMEX 2013 LEG1
   DEWEX-MERMEX 2013 LEG2
   EMSO LIGURE OUEST
   MOOSE-GE
   MOOSE-GE 2012
BO Le Suroît
AB The north-western Mediterranean deep convection plays a crucial role in the general circulation and biogeochemical cycles of the Mediterranean Sea. The DEWEX (DEnse Water EXperiment) project aimed to better understand this role through an intensive observation platform combined with a modelling framework. We developed a 3 dimensional coupled physical and biogeochemical model to estimate the cycling and budget of dissolved oxygen in the entire north-western Mediterranean deep convection area over the period September 2012 to September 2013. After showing that the simulated dissolved oxygen concentrations are in a good agreement with the in situ data collected from research cruises and Argo floats, we analyze the seasonal cycle of the air-sea oxygen exchanges, as well as physical and biological oxygen fluxes, and we estimate an annual oxygen budget. Our study indicates that the annual air-to-sea fluxes in the deep convection area amounted to 20 mol m−2 yr−1. 88 % of the annual uptake of atmospheric oxygen, i.e. 18 mol m−2, occurred during the intense vertical mixing period. The model shows that an amount of 27 mol m−2 of oxygen, injected at the sea surface and produced through photosynthesis, was transferred under the euphotic layer, mainly during deep convection. An amount of 20 mol m−2 of oxygen was then gradually exported in the aphotic layers to the south and west of the western basin, notably, through the spreading of dense waters recently formed. The decline in the deep convection intensity in this region predicted by the end of the century in recent projections, may have important consequences on the overall uptake of atmospheric oxygen in the Mediterranean Sea and on the oxygen exchanges with the Atlantic Ocean, that appear necessary to better quantify in the context of the expansion of low-oxygen zones. 
PY 2021
PD FEB
SO Biogeosciences
SN 1726-4170
PU Copernicus GmbH
VL 18
IS 3
UT 000618976200001
BP 937
EP 960
DI 10.5194/bg-18-937-2021
ID 75453
ER

EF