FN Archimer Export Format
PT J
TI Seasonal Variability of the Southern Tip of the Oxygen Minimum Zone in the Eastern South Pacific (30°‐38°S): A Modeling Study
BT 
AF PIZARRO-KOCH, Matias
   PIZARRO, Oscar
   DEWITTE, Boris
   MONTES, Ivonne
   RAMOS, Marcel
   PAULMIER, Aurelien
   GARCON, Veronique
AS 1:1,2,3;2:2,3,4;3:5,6,7,8;4:9;5:6,7,10;6:5;7:5;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Univ Concepcion, Fac Ciencias Nat & Oceanog, Dept Oceanog, Programa Postgrad Oceanog, Concepcion, Chile.
   Millennium Inst Oceanog, Concepcion, Chile.
   Univ Concepcion, Ctr Invest Oceanog COPAS Sur Austral, Concepcion, Chile.
   Univ Concepcion, Dept Geophys, Concepcion, Chile.
   CEAZA, Coquimbo, Chile.
   Univ Catolica Norte, Fac Ciencias Mar, Dept Biol Marina, Coquimbo, Chile.
   Univ Catolica Norte, Nucleo Milenio Ecol & Manejo Sustentable Islas Oc, Coquimbo, Chile.
   LEGOS CNRS IRD UPS CNES, Toulouse, France.
   Inst Geofis Peru, Lima, Peru.
   Ctr Innovac Acuicola Aquapacif, Coquimbo, Chile.
C2 UNIV CONCEPCION, CHILE
   MILLENNIUM INST OCEANOG, CHILE
   UNIV CONCEPCION, CHILE
   UNIV CONCEPCION, CHILE
   CEAZA, CHILE
   UNIV CATOLICA NORTE, CHILE
   UNIV CATOLICA NORTE, CHILE
   LEGOS, FRANCE
   INST GEOFIS PERU, PERU
   AQUAPACIFICO, CHILE
IF 3.559
TC 13
UR https://archimer.ifremer.fr/doc/00688/79991/82948.pdf
LA English
DT Article
CR AMOP
BO L'Atalante
DE ;Oxygen minimum zone;Eddy fluxes;Peru-Chile Undercurrent;Oxygen budget;Eastern South Pacific
AB We investigate the seasonal variability of the southern tip (30 degrees-38 degrees S) of the eastern South Pacific oxygen minimum zone (OMZ) based on a high horizontal resolution (1/12 degrees) regional coupled physical-biogeochemical model simulation. The simulation is validated by available in situ observations and the OMZ seasonal variability is documented. The model OMZ, bounded by the contour of 45 mu M, occupies a large volume (4.5x10(4) km(3)) during the beginning of austral winter and a minimum (3.5x10(4) km(3)) at the end of spring, just 1 and 2 months after the southward transport of the Peru-Chile Undercurrent (PCUC) is maximum and minimum, respectively. We showed that the PCUC significantly impacts the alongshore advection of dissolved oxygen (DO) modulating the OMZ seasonal variability. However, zonal transport of DO by meridionally alternating zonal jets and mesoscale eddy fluxes play also a major role in the seasonal and spatial variability of the OMZ. Consistently, a DO budget analysis reveals a significant contribution of advection terms to the rate of change of DO and the prominence of mesoscale variability within the seasonal cycle of these terms. Biogeochemical processes and horizontal and vertical mixing, associated with subgrid scale processes, play only a secondary role in the OMZ seasonal cycle. Overall, our study illustrates the interplay of mean and (mesoscale) eddy-induced transports of DO in shaping the OMZ and its seasonal cycle off Central Chile. 
PY 2019
PD DEC
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 124
IS 12
UT 000500665800001
BP 8574
EP 8604
DI 10.1029/2019JC015201
ID 79991
ER

EF