FN Archimer Export Format
PT J
TI Modeling the intense 2012-2013 dense water formation event in the northwestern Mediterranean Sea: Evaluation with an ensemble simulation approach
BT 
AF WALDMAN, Robin
   SOMOT, Samuel
   HERRMANN, Marine
   BOSSE, Anthony
   CANIAUX, Guy
   ESTOURNEL, Claude
   HOUPERT, Loic
   PRIEUR, Louis
   SEVAULT, Florence
   TESTOR, Pierre
AS 1:1;2:1;3:2;4:3;5:1;6:4;7:5;8:6;9:1;10:3;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Meteo France, CNRS, UMR 3589, CNRM, Toulouse, France.
   Univ Toulouse, CNRS, UMR5566, LEGOS, Toulouse, France.
   Univ Paris 06, CNRS, LOCEAN, Paris, France.
   Univ Toulouse, CNRS, LA, Toulouse, France.
   SAMS, Oban, Argyll, Scotland.
   Lab Oceanog Villefranche Sur Mer, Villefranche Sur Mer, France.
C2 CNRM (METEO FRANCE), FRANCE
   UNIV TOULOUSE, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV TOULOUSE, FRANCE
   SAMS SCOTLAND, UK
   UNIV PARIS 06, FRANCE
IF 2.711
TC 20
UR https://archimer.ifremer.fr/doc/00363/47379/47365.pdf
   https://archimer.ifremer.fr/doc/00363/47379/47367.pdf
   https://archimer.ifremer.fr/doc/00363/47379/47368.pdf
   https://archimer.ifremer.fr/doc/00363/47379/47369.pdf
   https://archimer.ifremer.fr/doc/00363/47379/47370.pdf
LA English
DT Article
CR DEWEX-MERMEX 2013 LEG1
   DEWEX-MERMEX 2013 LEG2
   MOOSE-GE 2012
BO Le Suroît
AB The northwestern Mediterranean Sea is a well-observed ocean deep convection site. Winter 2012-2013 was an intense and intensely documented dense water formation (DWF) event. We evaluate this DWF event in an ensemble configuration of the regional ocean model NEMOMED12. We then assess for the first time the impact of ocean intrinsic variability on DWF with a novel perturbed initial state ensemble method. Finally, we identify the main physical mechanisms driving water mass transformations.  NEMOMED12 reproduces accurately the deep convection chronology between late January and March, its location off the Gulf of Lions although with a southward shift and its magnitude. It fails to reproduce the Western Mediterranean Deep Waters salinification and warming, consistently with too strong a surface heat loss.  The Ocean Intrinsic Variability modulates half of the DWF area, especially in the open-sea where the bathymetry slope is low. It modulates marginally (3-5\%) the integrated DWF rate, but its increase with time suggests its impact could be larger at interannual timescales. We conclude that ensemble frameworks are necessary to evaluate accurately numerical simulations of DWF.  Each phase of DWF has distinct diapycnal and thermohaline regimes: during preconditioning, the Mediterranean thermohaline circulation is driven by exchanges with the Algerian basin. During the intense mixing phase, surface heat fluxes trigger deep convection and internal mixing largely determines the resulting deep water properties. During restratification, lateral exchanges and internal mixing are enhanced. Finally, isopycnal mixing was shown to play a large role in water mass transformations during the preconditioning and restratification phases.
PY 2017
PD FEB
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 122
IS 2
UT 000398063100031
BP 1297
EP 1324
DI 10.1002/2016JC012437
ID 47379
ER

EF