Universidad Peruana Cayetano Heredia

Attenuation of wind intensities exacerbates anoxic conditions leading to sulfur plume development off the coast of Peru

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dc.contributor.author Flores Rafael, Edgart Elvis
dc.contributor.author Mendoza, Ursula
dc.contributor.author Callbeck, Cameron M.
dc.contributor.author Díaz, Rut
dc.contributor.author Aguirre-Velarde, Arturo
dc.contributor.author Böttcher, Michael E.
dc.contributor.author Merma Mora, Lander
dc.contributor.author Moreira, Manuel
dc.contributor.author Saldarriaga, Maritza S.
dc.contributor.author Silva-Filho, Emmanoel V.
dc.contributor.author Albuquerque, Ana L.
dc.contributor.author Pizarro-Koch, Matias
dc.contributor.author Graco, Michelle Ivette
dc.date.accessioned 2023-10-09T17:09:15Z
dc.date.available 2023-10-09T17:09:15Z
dc.date.issued 2023
dc.identifier.uri https://hdl.handle.net/20.500.12866/14205
dc.description.abstract The release of vast quantities of sulfide from the sediment into the water column, known as a sulfidic event, has detrimental consequences on fish catches, including downstream effects on other linked element cycles. Despite being frequent occurrences in marine upwelling regions, our understanding of the factors that moderate sulfidic event formation and termination are still rudimentary. Here, we examined the biogeochemical and hydrodynamic conditions that underpinned the formation/termination of one of the largest sulfur plumes to be reported in the Peruvian upwelling zone. Consistent with previous research, we find that the sulfur-rich plume arose during the austral summer when anoxic conditions (i.e., oxygen and nitrate depletion) prevailed in waters overlying the upper shelf. Furthermore, the shelf sediments were organically charged and characterized by low iron-bound sulfur concentrations, further enabling the diffusion of benthic-generated sulfide into the water column. While these biogeochemical conditions provided a predicate to sulfidic event formation, we highlight that attenuations in local wind intensity served as an event trigger. Namely, interruptions in local wind speed constrained upwelling intensity, causing increased stratification over the upper shelf. Moreover, disturbances in local wind patterns likely placed additional constraints on wind-driven mesoscale eddy propagation, with feedback effects on coastal elemental sulfur plume (ESP) formation. We suggest ESP development occurs as a result of a complex interaction of biogeochemistry with regional hydrodynamics. en_US
dc.language.iso eng
dc.publisher PLoS
dc.relation.ispartofseries PLoS One
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Sediment en_US
dc.subject Sulfur en_US
dc.subject Sulfides en_US
dc.subject Water columns en_US
dc.subject Nitrates en_US
dc.subject Oxygen en_US
dc.subject El Niño-Southern Oscillation en_US
dc.subject Biogeochemistry en_US
dc.title Attenuation of wind intensities exacerbates anoxic conditions leading to sulfur plume development off the coast of Peru en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1371/journal.pone.0287914
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.00
dc.relation.issn 1932-6203


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