Mild Impact of the 2023 El Niño on Oceanographic and Biological Conditions in the Humboldt Current System

Vista sencilla de ítem
dc.contributor.authorAguilera, Victor M
dc.contributor.authorBarranco, Linda
dc.contributor.authorDewitte, Boris
dc.contributor.authorGonzalez, Carolina E
dc.contributor.authorOerder, Vera
dc.contributor.authorEscribano, Ruben
dc.date.accessioned2026-08-28T02:20:29Z
dc.date.available2026-08-28T02:20:29Z
dc.date.issued2025
dc.description.abstractEl Niño is an oceanographic‐atmospheric perturbation that originates atthe equator and subsequently moves poleward along the coasts of the American continent, alteringenvironmental and biological conditions of marine ecosystems. Upwelling supplies nutrients and concentratesplankton near the surface in some of these ecosystems, although it also promotes the transport of water andplankton to the open ocean. We recorded the ecosystem alterations associated with the El Niño 2023 in theHumboldt Archipelago, a biodiversity hotspot situated in a Chilean upwelling region of the Humboldt CurrentSystem. To this end, the abundance of plankton organisms (both phytoplankton and zooplankton), particulatecarbon and oceanographic conditions were assessed during eight nearly‐monthly campaigns. Planktonabundance in the archipelago depends also on local currents that disperse or concentrate particles. Thesecurrents originate from the interaction of winds and a canyon crossing the archipelago. Upwelling persistedduring the period despite the arrival of a warm Kelvin wave in June–July that elevated the sea level andtemperature. The phytoplankton abundance was the lowest after the warm wave, whereas particulate carbon andzooplankton were stable, but there was a significant surface increase during spring. The zooplankton abundancewas related to local environmental conditions, such as food and currents.
dc.description.sponsorshipAgencia Nacional de Investigacin y Desarrollo ACT21007, AIM23-0003; 2020-R20F0008-CEAZA, FB210021, FONDECYT 1251435, FONDECYT 1231174
dc.identifier.doi10.1029/2025JG009094
dc.identifier.issn2169-8953
dc.identifier.urihttps://repositorioabierto.uantof.cl/handle/uantof/744
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.relation.urihttps://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JG009094
dc.rights© 2025. American Geophysical Union. AllRights Reserve
dc.sourceJournal of Geophysical Research: Biogeosciences
dc.subjectsoutheastern pacific
dc.subjectENSO
dc.subjectupwelling
dc.subjectHumboldt archipelago
dc.subjectphytoplankton biomass
dc.subjectzooplankton biomass
dc.titleMild Impact of the 2023 El Niño on Oceanographic and Biological Conditions in the Humboldt Current System
dc.typeArticle
oaire.citation.volume130
oaire.citationIssue11
organization.identifier.rorhttps://ror.org/04eyc6d95
organization.legalNameUniversidad de Antofagasta
uantof.identificator.facultyFacultad de Ciencias del Mar y Recursos Biológicos
uantof.identificator.instituteInstituto de Ciencias Naturales Alexander von Humboldt
Archivos
Colecciones
Instituto de Ciencias Naturales Alexander von Humboldt