Iron isotope systematics in Arctic rivers
cited By 7 International audience The input of iron to the Arctic Ocean plays a critical role in the productivity of aquatic ecosystems and is potentially impacted by climate change. We examine Fe isotope systematics of dissolved and colloidal Fe from several Arctic and sub-Arctic rivers in northern...
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ftunivnantes:oai:HAL:hal-01590277v1 2023-05-15T14:34:37+02:00 Iron isotope systematics in Arctic rivers Escoube, R. Rouxel, Olivier, Pokrovsky, O.S. Schroth, A. Max Holmes, R. Donard, Olivier François Xavier Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) 2015 https://hal.archives-ouvertes.fr/hal-01590277 https://doi.org/10.1016/j.crte.2015.04.005 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2015.04.005 hal-01590277 https://hal.archives-ouvertes.fr/hal-01590277 doi:10.1016/j.crte.2015.04.005 Comptes Rendus Géoscience https://hal.archives-ouvertes.fr/hal-01590277 Comptes Rendus Géoscience, Elsevier, 2015, 347 (7-8), pp.377-385. ⟨10.1016/j.crte.2015.04.005⟩ [CHIM.ANAL]Chemical Sciences/Analytical chemistry info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.1016/j.crte.2015.04.005 2022-11-09T02:01:25Z cited By 7 International audience The input of iron to the Arctic Ocean plays a critical role in the productivity of aquatic ecosystems and is potentially impacted by climate change. We examine Fe isotope systematics of dissolved and colloidal Fe from several Arctic and sub-Arctic rivers in northern Eurasia and Alaska. We demonstrate that the Fe isotopic (δ56Fe) composition of large rivers, such as the Ob' and Lena, has a restricted range of δ56Fe values ca.-0.11±0.13‰, with minimal seasonal variability, in stark contrast to smaller organic-rich rivers with an overall δ56Fe range from-1.7 to+1.6‰. The preferential enrichment with heavy Fe isotopes observed in low molecular weight colloidal fraction and during the high-flow period is consistent with the role of organic complexation of Fe. The light Fe isotope signatures of smaller rivers and meltwater reflect active redox cycling. Data synthesis reveals that small organic-rich rivers and meltwater in Arctic environments may contribute disproportionately to the input of labile Fe in the Arctic Ocean, while bearing contrasting Fe isotope compositions compared to larger rivers. © 2015 Académie des sciences. Article in Journal/Newspaper Arctic Arctic Ocean Climate change Alaska Université de Nantes: HAL-UNIV-NANTES Arctic Arctic Ocean Comptes Rendus Geoscience 347 7-8 377 385 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[CHIM.ANAL]Chemical Sciences/Analytical chemistry |
spellingShingle |
[CHIM.ANAL]Chemical Sciences/Analytical chemistry Escoube, R. Rouxel, Olivier, Pokrovsky, O.S. Schroth, A. Max Holmes, R. Donard, Olivier François Xavier Iron isotope systematics in Arctic rivers |
topic_facet |
[CHIM.ANAL]Chemical Sciences/Analytical chemistry |
description |
cited By 7 International audience The input of iron to the Arctic Ocean plays a critical role in the productivity of aquatic ecosystems and is potentially impacted by climate change. We examine Fe isotope systematics of dissolved and colloidal Fe from several Arctic and sub-Arctic rivers in northern Eurasia and Alaska. We demonstrate that the Fe isotopic (δ56Fe) composition of large rivers, such as the Ob' and Lena, has a restricted range of δ56Fe values ca.-0.11±0.13‰, with minimal seasonal variability, in stark contrast to smaller organic-rich rivers with an overall δ56Fe range from-1.7 to+1.6‰. The preferential enrichment with heavy Fe isotopes observed in low molecular weight colloidal fraction and during the high-flow period is consistent with the role of organic complexation of Fe. The light Fe isotope signatures of smaller rivers and meltwater reflect active redox cycling. Data synthesis reveals that small organic-rich rivers and meltwater in Arctic environments may contribute disproportionately to the input of labile Fe in the Arctic Ocean, while bearing contrasting Fe isotope compositions compared to larger rivers. © 2015 Académie des sciences. |
author2 |
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Escoube, R. Rouxel, Olivier, Pokrovsky, O.S. Schroth, A. Max Holmes, R. Donard, Olivier François Xavier |
author_facet |
Escoube, R. Rouxel, Olivier, Pokrovsky, O.S. Schroth, A. Max Holmes, R. Donard, Olivier François Xavier |
author_sort |
Escoube, R. |
title |
Iron isotope systematics in Arctic rivers |
title_short |
Iron isotope systematics in Arctic rivers |
title_full |
Iron isotope systematics in Arctic rivers |
title_fullStr |
Iron isotope systematics in Arctic rivers |
title_full_unstemmed |
Iron isotope systematics in Arctic rivers |
title_sort |
iron isotope systematics in arctic rivers |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01590277 https://doi.org/10.1016/j.crte.2015.04.005 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Alaska |
genre_facet |
Arctic Arctic Ocean Climate change Alaska |
op_source |
Comptes Rendus Géoscience https://hal.archives-ouvertes.fr/hal-01590277 Comptes Rendus Géoscience, Elsevier, 2015, 347 (7-8), pp.377-385. ⟨10.1016/j.crte.2015.04.005⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2015.04.005 hal-01590277 https://hal.archives-ouvertes.fr/hal-01590277 doi:10.1016/j.crte.2015.04.005 |
op_doi |
https://doi.org/10.1016/j.crte.2015.04.005 |
container_title |
Comptes Rendus Geoscience |
container_volume |
347 |
container_issue |
7-8 |
container_start_page |
377 |
op_container_end_page |
385 |
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1766307620714446848 |