@article{fdi:010077384, title = {{S}easonal variability of the southern tip of the oxygen minimum zone in the {E}astern {S}outh {P}acific (30 degrees - 38 degrees {S}) : a modeling study}, author = {{P}izarro-{K}och, {M}. and {P}izarro, {O}. and {D}ewitte, {B}oris and {M}ontes, {I}. and {R}amos, {M}. and {P}aulmier, {A}ur{\'e}lien and {G}arcon, {V}.}, editor = {}, language = {{ENG}}, abstract = {{W}e investigate the seasonal variability of the southern tip (30 degrees-38 degrees {S}) of the eastern {S}outh {P}acific oxygen minimum zone ({OMZ}) based on a high horizontal resolution (1/12 degrees) regional coupled physical-biogeochemical model simulation. {T}he simulation is validated by available in situ observations and the {OMZ} seasonal variability is documented. {T}he 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 {P}eru-{C}hile {U}ndercurrent ({PCUC}) is maximum and minimum, respectively. {W}e showed that the {PCUC} significantly impacts the alongshore advection of dissolved oxygen ({DO}) modulating the {OMZ} seasonal variability. {H}owever, 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}. {C}onsistently, 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. {B}iogeochemical processes and horizontal and vertical mixing, associated with subgrid scale processes, play only a secondary role in the {OMZ} seasonal cycle. {O}verall, our study illustrates the interplay of mean and (mesoscale) eddy-induced transports of {DO} in shaping the {OMZ} and its seasonal cycle off {C}entral {C}hile.}, keywords = {{O}xygen minimum zone ; {E}ddy fluxes ; {P}eru-{C}hile {U}ndercurrent ; {O}xygen budget ; {E}astern {S}outh {P}acific ; {PEROU} ; {CHILI} ; {PACIFIQUE} {SUD} {EST}}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans}, volume = {124}, numero = {12}, pages = {8574--8604}, ISSN = {2169-9275}, year = {2019}, DOI = {10.1029/2019jc015201}, URL = {https://www.documentation.ird.fr/hor/fdi:010077384}, }