FN Archimer Export Format
PT J
TI Atlantic circulation changes across a stadial-interstadial transition
BT 
AF Waelbroeck, Claire
   Tjiputra, Jerry
   Guo, Chuncheng
   Nisancioglu, Kerim H.
   Jansen, Eystein
   Vazquez Riveiros, Natalia
   Toucanne, Samuel
   Eynaud, Frédérique
   Rossignol, Linda
   Dewilde, Fabien
   Marchès, Elodie
   Lebreiro, Susana
   Nave, Silvia
AS 1:1;2:2;3:2;4:3;5:2,3;6:4;7:4;8:5;9:5;10:6;11:7;12:8;13:9;
FF 1:;2:;3:;4:;5:;6:PDG-REM-GEOOCEAN-ASTRE;7:PDG-REM-GEOOCEAN-ASTRE;8:;9:;10:;11:;12:;13:;
C1 LOCEAN/IPSL, Sorbonne Université-CNRS-IRD-MNHN, UMR7159, 75005 Paris, France
   NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, 5007 Bergen, Norway
   Department of Earth Science, University of Bergen, Bjerknes Centre for Climate Research, 5007 Bergen, Norway
   Geo-Ocean, University of Brest, CNRS, IFREMER, UMR6538, 29280 Plouzané, France
   UMR-CNRS 5805 EPOC - OASU, University of Bordeaux, 50023 Pessac, France
   IUEM, UMS3113, 29280 Plouzané, France
   Service Hydrographique et Océanographique de la Marine, 29228 Brest, France
   Instituto Geológico y Minero de España (IGME)-CSIC, 28003 Madrid, Spain
   LNEG, I.P., UGHGC, 2610-999 Amadora, Portugal
C2 UNIV SORBONNE, FRANCE
   NORCE, NORWAY
   UNIV BERGEN, NORWAY
   IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
   UBO, FRANCE
   SHOM, FRANCE
   CSIC, SPAIN
   LNEG, PORTUGAL
SI BREST
SE PDG-REM-GEOOCEAN-ASTRE
UM GEO-OCEAN
IN WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
IF 4.3
TC 1
UR https://archimer.ifremer.fr/doc/00805/91721/97662.pdf
   https://archimer.ifremer.fr/doc/00805/91721/102259.pdf
   https://archimer.ifremer.fr/doc/00805/91721/102260.pdf
   https://archimer.ifremer.fr/doc/00805/91721/102261.pdf
LA English
DT Article
CR MD 134 / PICABIA
   MD 203 / ACCLIMATE
   VT 133 / MERIADZEC
BO Marion Dufresne
AB We combine consistently dated benthic carbon isotopic records distributed over the entire Atlantic Ocean with numerical simulations performed by a glacial configuration of the Norwegian Earth System Model with active ocean biogeochemistry, in order to interpret the observed Cibicides δ13C changes at the stadial-interstadial transition corresponding to the end of Heinrich Stadial 4 (HS4) in terms of ocean circulation and remineralization changes. We show that the marked increase in Cibicides δ13C observed at the end of HS4 between ~2000 and 4200 m in the Atlantic can be explained by changes in nutrient concentrations as simulated by the model in response to the halting of freshwater input in the high latitude glacial North Atlantic. Our model results show that this Cibicides δ13C signal is associated with changes in the ratio of southern-sourced (SSW) versus northern-sourced (NSW) water masses at the core sites, whereby SSW is replaced by NSW as a consequence of the resumption of deep water formation in the northern North Atlantic and Nordic Seas after the freshwater input is halted. Our results further suggest that the contribution of ocean circulation changes to this signal increases from ~40 % at 2000 m to ~80 % at 4000 m. Below ~4200 m, the model shows little ocean circulation change but an increase in remineralization across the transition marking the end of HS4. The simulated lower remineralization during stadials than interstadials is particularly pronounced in deep subantarctic sites, in agreement with the decrease in the export production of carbon to the deep Southern Ocean during stadials found in previous studies. 
PY 2023
PD MAY
SO Climate Of The Past
SN 1814-9324
PU Copernicus GmbH
VL 19
IS 5
UT 001033179700001
BP 901
EP 913
DI 10.5194/cp-19-901-2023
ID 91721
ER

EF