Chemical controls on iron distributions across the subsurface South Pacific Ocean

Iron and nitrogen are the primary nutrients that limit productivity in the ocean. While nitrogen cycling is largely controlled by biology, iron cycling is strongly determined by chemistry because iron losses are driven by abiotic formation of authigenic mineral iron. Here, we apply a mechanistic app...

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Detalles Bibliográficos
Autores: Gledhill, M., Gosnell, K., Humphreys, M. P., Delaigue, L., Helle, N., Zhu, K., Lodeiro, Pablo, Rey-Castro, Carlos, Achterberg, E. P.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2026
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:dnet:.___________::303d8fa971977ff0e304b9719f4b07ff
Acceso en línea:https://doi.org/10.1038/s41467-026-72070-y
https://hdl.handle.net/10459.1/470082
Access Level:acceso abierto
Palabra clave:Iron cycling
Organic matter
Authigenic minerals
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spelling Chemical controls on iron distributions across the subsurface South Pacific OceanGledhill, M.Gosnell, K.Humphreys, M. P.Delaigue, L.Helle, N.Zhu, K.Lodeiro, PabloRey-Castro, CarlosAchterberg, E. P.Iron cyclingOrganic matterAuthigenic mineralsIron and nitrogen are the primary nutrients that limit productivity in the ocean. While nitrogen cycling is largely controlled by biology, iron cycling is strongly determined by chemistry because iron losses are driven by abiotic formation of authigenic mineral iron. Here, we apply a mechanistic approach to examine how organic matter across the dissolved-particulate size spectrum controls authigenic iron formation in subsurface waters (>250 m) of the South Pacific Ocean. We find that accounting for the chemical heterogeneity of organic matter is essential for predicting widespread authigenic iron formation. Predicted dissolved and particulate iron concentrations matched observations in the ocean interior, while discrepancies were linked to kinetic control of authigenic iron formation or inputs of particles from the seafloor. Our work shows the need to represent the complexity of abiotic interactions to better resolve the interplay of chemical and biological controls on ocean iron cyclingOpen Access funding enabled and organized by Projekt DEAL.Nature2026info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1038/s41467-026-72070-yhttps://hdl.handle.net/10459.1/470082reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésReproducció del document publicat a https://doi.org/10.1038/s41467-026-72070-yNature Communications, 2026, vol. 17, núm. 3533, p. 1-14cc-by (c) Gledhill et al., 2026Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:dnet:.___________::303d8fa971977ff0e304b9719f4b07ff2026-06-24T12:42:17Z
dc.title.none.fl_str_mv Chemical controls on iron distributions across the subsurface South Pacific Ocean
title Chemical controls on iron distributions across the subsurface South Pacific Ocean
spellingShingle Chemical controls on iron distributions across the subsurface South Pacific Ocean
Gledhill, M.
Iron cycling
Organic matter
Authigenic minerals
title_short Chemical controls on iron distributions across the subsurface South Pacific Ocean
title_full Chemical controls on iron distributions across the subsurface South Pacific Ocean
title_fullStr Chemical controls on iron distributions across the subsurface South Pacific Ocean
title_full_unstemmed Chemical controls on iron distributions across the subsurface South Pacific Ocean
title_sort Chemical controls on iron distributions across the subsurface South Pacific Ocean
dc.creator.none.fl_str_mv Gledhill, M.
Gosnell, K.
Humphreys, M. P.
Delaigue, L.
Helle, N.
Zhu, K.
Lodeiro, Pablo
Rey-Castro, Carlos
Achterberg, E. P.
author Gledhill, M.
author_facet Gledhill, M.
Gosnell, K.
Humphreys, M. P.
Delaigue, L.
Helle, N.
Zhu, K.
Lodeiro, Pablo
Rey-Castro, Carlos
Achterberg, E. P.
author_role author
author2 Gosnell, K.
Humphreys, M. P.
Delaigue, L.
Helle, N.
Zhu, K.
Lodeiro, Pablo
Rey-Castro, Carlos
Achterberg, E. P.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Iron cycling
Organic matter
Authigenic minerals
topic Iron cycling
Organic matter
Authigenic minerals
description Iron and nitrogen are the primary nutrients that limit productivity in the ocean. While nitrogen cycling is largely controlled by biology, iron cycling is strongly determined by chemistry because iron losses are driven by abiotic formation of authigenic mineral iron. Here, we apply a mechanistic approach to examine how organic matter across the dissolved-particulate size spectrum controls authigenic iron formation in subsurface waters (>250 m) of the South Pacific Ocean. We find that accounting for the chemical heterogeneity of organic matter is essential for predicting widespread authigenic iron formation. Predicted dissolved and particulate iron concentrations matched observations in the ocean interior, while discrepancies were linked to kinetic control of authigenic iron formation or inputs of particles from the seafloor. Our work shows the need to represent the complexity of abiotic interactions to better resolve the interplay of chemical and biological controls on ocean iron cycling
publishDate 2026
dc.date.none.fl_str_mv 2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1038/s41467-026-72070-y
https://hdl.handle.net/10459.1/470082
url https://doi.org/10.1038/s41467-026-72070-y
https://hdl.handle.net/10459.1/470082
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a https://doi.org/10.1038/s41467-026-72070-y
Nature Communications, 2026, vol. 17, núm. 3533, p. 1-14
dc.rights.none.fl_str_mv cc-by (c) Gledhill et al., 2026
Attribution 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Gledhill et al., 2026
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Nature
publisher.none.fl_str_mv Nature
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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