Boundaries of the Peruvian oxygen minimum zone shaped by coherent mesoscale dynamics

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dc.contributor.authorBettencourt, Joao
dc.contributor.authorLópez, Cristobal
dc.contributor.authorHernández-García, Emilio
dc.contributor.authorMontes Torres, Ivonne
dc.contributor.authorSudre, Joël
dc.contributor.authorDewitte, Boris
dc.contributor.authorPaulmier, Aurélien
dc.contributor.authorGarçon, Véronique
dc.coverage.spatialPerú
dc.date.accessioned2018-09-11T13:22:51Z
dc.date.available2018-09-11T13:22:51Z
dc.date.issued2015
dc.description.abstractDissolved oxygen in sea water is a major factor affecting marine habitats and biogeochemical cycles. Oceanic zones with oxygen deficits represent significant portions of the area and volume of the oceans and are thought to be expanding. The Peruvian oxygen minimum zone is one of the most pronounced and lies in a region of strong mesoscale activity in the form of vortices and frontal regions, whose effect in the dynamics of the oxygen minimum zone is largely unknown. Here, we study this issue from a modeling approach and a Lagrangian point of view, using a coupled physical-biogeochemical simulation of the Peruvian oxygen minimum zone and finite-size Lyapunov exponent fields to understand the link between mesoscale dynamics and oxygen variations. Our results show that, at depths between 380 and 600 meters, mesoscale structures have a relevant dual role. First, their mean positions and paths delimit and maintain the oxygen minimum zone boundaries. Second, their high frequency fluctuations entrain oxygen across these boundaries as eddy fluxes that point towards the interior of the oxygen minimum zone and are one order of magnitude larger than mean fluxes. We conclude that these eddy fluxes contribute to the ventilation of the oxygen minimum zone.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationBettencourt, J. H., López, C., Hernández-García, E., Montes, I., Sudre, J., Dewitte, B., ... Garçon, V. (2015). Boundaries of the Peruvian oxygen minimum zone shaped by coherent mesoscale dynamics.==$Nature Geoscience, 8,$==937-940. https://doi.org/10.1038/ngeo2570es_ES
dc.identifier.doihttps://doi.org/10.1038/ngeo2570es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalNature Geosciencees_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2910
dc.language.isoenges_ES
dc.publisherNature Researches_ES
dc.relation.ispartofurn:issn:1752-0894
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectBiogeochemistryes_ES
dc.subjectPhysical oceanographyes_ES
dc.subjectOxygen Minimum Zonees_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.titleBoundaries of the Peruvian oxygen minimum zone shaped by coherent mesoscale dynamicses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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