FN Archimer Export Format
PT J
TI A submesoscale coherent vortex in the Ligurian Sea: From dynamical barriers to biological implications
BT 
AF BOSSE, Anthony
   TESTOR, Pierre
   MAYOT, Nicolas
   PRIEUR, Louis
   D'ORTENZIO, Fabrizio
   MORTIER, Laurent
   LE GOFF, Herve
   GOURCUFF, Claire
   COPPOLA, Laurent
   LAVIGNE, Heloise
   RAIMBAULT, Patrick
AS 1:1,2;2:2;3:3;4:3;5:3;6:2,4;7:2;8:2,5;9:3;10:6;11:7;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;
C1 Univ Bergen, Inst Geophys, Bjerknes Ctr Climate Res, Bergen, Norway.
   Univ Paris 06, Lab LOCEAN, Sorbonne Univ, UPMC,CNRS,IRD,MNHN, Paris, France.
   Univ Paris 06, Sorbonne Univ, Lab Oceanog Villefranche, UPMC,CNRS, Villefranche Sur Mer, France.
   ENSTA Paristech, Palaiseau, France.
   Euro Argo ERIC, Brest, France.
   Ist Nazl Oceanog & Geofis Sperimentale, Trieste, Italy.
   Sud Toulon Var Univ, Aix Marseille Univ, CNRS, INSU,IRD,MIO, Marseille, France.
C2 UNIV BERGEN, NORWAY
   UNIV PARIS 06, FRANCE
   UNIV PARIS 06, FRANCE
   ENSTA PARISTECH, FRANCE
   EURO ARGO ERIC, FRANCE
   OGS, ITALY
   UNIV AIX MARSEILLE, FRANCE
IF 2.711
TC 34
UR https://archimer.ifremer.fr/doc/00385/49648/50162.pdf
LA English
DT Article
CR DEWEX-MERMEX 2013 LEG1
   DEWEX-MERMEX 2013 LEG2
   MOOSE-GE
BO Le Suroît
DE ;coherent eddies;submesoscale eddies;nutrients;phytoplankton;glider;Mediterranean Sea
AB In June 2013, a glider equipped with oxygen and fluorescence sensors has been used to extensively sample an anticyclonic Submesoscale Coherent Vortex (SCV) in the Ligurian Sea (NW Mediterranean Sea). Those measurements are complemented by full-depth CTD casts (T, S, Oxygen) and water samples documenting nutrients and phytoplankton pigments within the SCV and outside. The SCV has a very homogeneous core of oxygenated waters between 300 m and 1200 m formed 4.5 months earlier during the winter deep convection event. It has a strong dynamical signature with peak velocities at 700 m depth of 13.9 cm s-1 in cyclogeostrophic balance. The eddy has a small radius of 6.2 km corresponding to high Rossby number of −0.45. The vorticity at the eddy center reaches −0.8f. Cross-stream isopycnic diffusion of tracers between the eddy core and the surroundings is found to be very limited due to dynamical barriers set by the SCV associated with a diffusivity coefficient of about 0.2 m2 s-1. The deep core is nutrients-depleted with concentrations of nitrate, phosphate and silicate 13–18% lower than the rich surrounding waters. However, the nutriclines are shifted of about 20–50 m toward the surface thus increasing the nutrients availability for phytoplankton. Chlorophyll-a concentrations at the deep chlorophyll maximum are subsequently about twice bigger as compared to outside. Pigments further reveal the predominance of nanophytoplankton inside the eddy and an enhancement of the primary productivity. This study demonstrate the important impact of post-convective SCVs on nutrients distribution and phytoplankton community, as well as on the subsequent primary production and carbon sequestration. 
PY 2017
PD AUG
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 122
IS 8
UT 000410790600009
BP 6196
EP 6217
DI 10.1002/2016JC012634
ID 49648
ER

EF