FN Archimer Export Format
PT J
TI Impact of the Mesoscale Dynamics on Ocean Deep Convection: The 2012-2013 Case Study in the Northwestern Mediterranean Sea
BT 
AF WALDMAN, Robin
   HERRMANN, Marine
   SOMOT, Samuel
   ARSOUZE, Thomas
   BENSHILA, Rachid
   BOSSE, Anthony
   CHANUT, Jerome
   GIORDANI, Herve
   SEVAULT, Florence
   TESTOR, Pierre
AS 1:1;2:2;3:1;4:3,4;5:2;6:5;7:6;8:1;9:1;10:7;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 CNRS, Ctr Natl Rech Meteorol, Meteo France, Toulouse, France.
   Univ Toulouse, Lab Etud Geophys & Oceanog Spatiale, IRD, CNRS,CNES,UMR5566, Toulouse, France.
   Univ Paris Saclay, ENSTA ParisTech, Palaiseau, France.
   Ecole Polytech, Lab Meteorol Dynam, Palaiseau, France.
   Univ Bergen, Inst Geophys, Bergen, Norway.
   MERCATOR Ocean, Toulouse, France.
   Univ Paris 06, CNRS, Lab Oceanog & Climat Experimentat & Approches Num, Paris, France.
C2 CNRS, FRANCE
   UNIV TOULOUSE, FRANCE
   UNIV PARIS SACLAY, FRANCE
   ECOLE POLYTECH, FRANCE
   UNIV BERGEN, NORWAY
   MERCATOR OCEAN, FRANCE
   UNIV PARIS 06, FRANCE
IF 2.711
TC 12
UR https://archimer.ifremer.fr/doc/00403/51409/51986.pdf
LA English
DT Article
CR DEWEX-MERMEX 2013 LEG1
   DEWEX-MERMEX 2013 LEG2
   MOOSE-GE 2012
   MOOSE-GE 2013
BO Le Suroît
   Téthys II
DE ;ocean deep convection;mesoscale;ocean modeling;Mediterranean Sea;ensemble approach;model evaluation
AB Winter 2012-2013 was a particularly intense and well-observed Dense Water Formation (DWF) event in the Northwestern Mediterranean Sea. In this study, we investigate the impact of the mesoscale dynamics on DWF. We perform two perturbed initial state simulation ensembles from summer 2012 to 2013, respectively mesoscale-permitting and mesoscale-resolving, with the AGRIF refinement tool in the Mediterranean configuration NEMOMED12. The mean impact of the mesoscale on DWF occurs mainly through the high-resolution physics and not the high-resolution bathymetry. This impact is shown to be modest: the mesoscale doesn't modify the chronology of the deep convective winter nor the volume of dense waters formed. It however impacts the location of the mixed patch by reducing its extent to the west of the North Balearic Front and by increasing it along the Northern Current, in better agreement with observations. The maximum mixed patch volume is significantly reduced from 5.7 ± 0.2 to 4.2 ± 0.6 1013m3. Finally, the spring restratification volume is more realistic and enhanced from 1.4 ± 0.2 to 1.8 ± 0.2 1013m3 by the mesoscale. We also address the mesoscale impact on the ocean intrinsic variability by performing perturbed initial state ensemble simulations. The mesoscale enhances the intrinsic variability of the deep convection geography, with most of the mixed patch area impacted by intrinsic variability. The DWF volume has a low intrinsic variability but it is increased by 2-3 times with the mesoscale. We relate it to a dramatic increase of the Gulf of Lions eddy kinetic energy from 5.0 ± 0.6 to 17.3 ± 1.5cm2/s2, in remarkable agreement with observations. 
PY 2017
PD NOV
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 122
IS 11
UT 000418089400027
BP 8813
EP 8840
DI 10.1002/2016JC012587
ID 51409
ER

EF