FN Archimer Export Format
PT J
TI High-resolution modeling of the Eastern Tropical Pacific oxygen minimum zone: Sensitivity to the tropical oceanic circulation
BT 
AF MONTES, Ivonne
   DEWITTE, Boris
   GUTKNECHT, Elodie
   PAULMIER, Aurelien
   DADOU, Isabelle
   OSCHLIES, Andreas
   GARCON, Veronique
AS 1:1,2,3;2:1;3:1;4:1,4;5:1;6:2;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 CNRS CNES UPS IRD, Lab Etud Geophys & Oceanog Spatiales, UMR 5566, Toulouse, France.
   GEOMAR Helmholtz Ctr Ocean Res, Kiel, Germany.
   IGP, Lima, Peru.
   Inst Mar IMARPE, Callao, Peru.
C2 CNRS, FRANCE
   IFM GEOMAR, GERMANY
   IGP, PERU
   IMARPE, PERU
IF 2.939
TC 48
UR https://archimer.ifremer.fr/doc/00688/79998/82951.pdf
LA English
DT Article
CR AMOP
BO L'Atalante
AB The connection between the equatorial mean circulation and the oxygen minimum zone (OMZ) in the Eastern Tropical Pacific is investigated through sensitivity experiments with a high-resolution coupled physical-biogeochemical model. A validation against in situ observations indicates a realistic simulation of the vertical and horizontal oxygen distribution by the model. Two sets of climatological open-boundary conditions for the physical variables, which differ slightly with respect to the intensity and vertical structure of the Equatorial Current System, are shown to lead to contrasting characteristics of the simulated OMZ dynamics. From a Lagrangian perspective, the mean differences near the coast originate to a large extent from the different transport of deoxygenated waters by the secondary Tsuchiya Jet (secondary Southern Subsurface Countercurrent, sSSCC). The O-2 budget further indicates a large difference in the balance between tendency terms, with advection exhibiting the largest difference between both simulations, which is shown to result from both linear and nonlinear advection. At regional scale, we also find that the variability of the physical contribution to the rate of O-2 change is one order of magnitude larger than the variability associated with the biogeochemical contribution, which originates from internal high-frequency variability. Overall our study illustrates the large sensitivity of the OMZ dynamics to the equatorial circulation. 
PY 2014
PD AUG
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 119
IS 8
UT 000342519500046
BP 5515
EP 5532
DI 10.1002/2014JC009858
ID 79998
ER

EF