Seasonal variability of the Southern tip of the Oxygen Minimum Zone in the Eastern South Pacific (30°‐38°S): a modeling study

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dc.contributor.authorPizarro‐Koch, Matias
dc.contributor.authorPizarro, Oscar
dc.contributor.authorDewitte, Boris
dc.contributor.authorMontes Torres, Ivonne
dc.contributor.authorRamos, Marcel
dc.contributor.authorPaulmier, Aurélien
dc.contributor.authorGarçon, Véronique
dc.date.accessioned2020-02-28T10:10:40Z
dc.date.available2020-02-28T10:10:40Z
dc.date.issued2019-12
dc.description.abstractWe investigate the seasonal variability of the southern tip (30°–38°S) of the eastern South Pacific oxygen minimum zone (OMZ) based on a high horizontal resolution (1/12°) 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 μM, occupies a large volume (4.5x10⁴ km³) during the beginning of austral winter and a minimum (3.5x10⁴ km³) 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.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationPizarro‐Koch, M., Pizarro, O., Dewitte, B., Montes, I., Ramos, M., Paulmier, A., & Garçon, V. (2019). Seasonal Variability of the Southern Tip of the Oxygen Minimum Zone in the Eastern South Pacific (30°‐38° S): A Modeling Study.==$Journal of Geophysical Research: Oceans, 124$==(12), 8574-8604. https://doi.org/10.1029/2019JC015201es_ES
dc.identifier.doihttps://doi.org/10.1029/2019JC015201es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Oceanses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/4769
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Union (AGU)es_ES
dc.relation.ispartofurn:issn:2169-9275
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectOxygen minimum zonees_ES
dc.subjectEddy fluxeses_ES
dc.subjectPeru‐Chile Undercurrentes_ES
dc.subjectOxygen budgetes_ES
dc.subjectEastern South Pacifices_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.09es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.11es_ES
dc.titleSeasonal variability of the Southern tip of the Oxygen Minimum Zone in the Eastern South Pacific (30°‐38°S): a modeling studyes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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