FN Archimer Export Format
PT J
TI Isopycnal eddy stirring dominates thermohaline mixing in the upper subpolar North Atlantic
BT 
AF Fernández Castro, Bieito
   Fernandez Roman, Daniel
   Ferron, Bruno
   Fontela, Marcos
   Lherminier, Pascale
   Naveira Garabato, Alberto C.
   Pérez, Fiz
   Pranas Spingys, Carl
   Polzin, Kurt
   Velo, Anton
AS 1:1;2:2;3:3;4:4;5:5;6:1;7:6;8:7;9:8;10:6;
FF 1:;2:;3:;4:;5:PDG-ODE-LOPS-OH;6:;7:;8:;9:;10:;
C1 University of Southampton, UK
   Universidade de Vigo, Spain
   French National Centre for Scientific Research (CNRS), france
   Instituto de Investigacións Mariñas, IIM-CSIC, Spain
   Ifremer, France
   Instituto de Investigaciones Marinas. IIM-CSIC, Spain
   National Oceanography Centre, UK
   Woods Hole Oceanographic Institution, USA
C2 UNIV SOUTHAMPTON, UK
   UNIV VIGO, SPAIN
   CNRS, FRANCE
   IIM CSIC, SPAIN
   IFREMER, FRANCE
   IIM CSIC, SPAIN
   NOC, UK
   WHOI, USA
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
TC 0
UR https://archimer.ifremer.fr/doc/00867/97913/107011.pdf
LA English
DT Article
AB The Atlantic Meridional Overturning Circulation (AMOC) entails vigorous thermohaline transformations in the subpolar North Atlantic (SPNA). There, warm and saline waters originating in the subtropics are converted into cooler and fresher waters by a combination of surface fluxes and sub-surface thermohaline mixing. Using microstructure measurements and a small-scale variance conservation framework, we quantify the diapycnal and isopycnal contributions to thermohaline mixing within the eastern SPNA. Isopycnal stirring is found to account for 65% of thermal and 84% of haline variance dissipation in the upper 400 m of the eastern SPNA, suggesting an important role of isopycnal stirring in regional water-mass transformations. By applying the tracer variance method to two tracers, we underscore the special significance of isopycnal stirring for tracers weakly coupled to density, such as biologically-active tracers. Our findings thus highlight the central role of isopycnal stirring in both the AMOC and biogeochemical dynamics within the SPNA. 
PY 2023
PD DEC
SO ESS Open Archive
PU Authorea, Inc.
DI 10.22541/essoar.170196957.75231388/v1
ID 97913
ER

EF