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Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords

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Standard

Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords. / Herbert, Lisa C.; Zhu, Qingzhi; Michaud, Alexander B.; Laufer-Meiser, Katja; Jones, Christopher K.; Riedinger, Natascha; Stooksbury, Zachery S.; Aller, Robert C.; Jørgensen, Bo Barker; Wehrmann, Laura M.

I: Limnology and Oceanography, Bind 66, Nr. 9, 09.2021, s. 3374-3392.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Herbert, LC, Zhu, Q, Michaud, AB, Laufer-Meiser, K, Jones, CK, Riedinger, N, Stooksbury, ZS, Aller, RC, Jørgensen, BB & Wehrmann, LM 2021, 'Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords', Limnology and Oceanography, bind 66, nr. 9, s. 3374-3392. https://doi.org/10.1002/lno.11885

APA

Herbert, L. C., Zhu, Q., Michaud, A. B., Laufer-Meiser, K., Jones, C. K., Riedinger, N., Stooksbury, Z. S., Aller, R. C., Jørgensen, B. B., & Wehrmann, L. M. (2021). Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords. Limnology and Oceanography, 66(9), 3374-3392. https://doi.org/10.1002/lno.11885

CBE

Herbert LC, Zhu Q, Michaud AB, Laufer-Meiser K, Jones CK, Riedinger N, Stooksbury ZS, Aller RC, Jørgensen BB, Wehrmann LM. 2021. Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords. Limnology and Oceanography. 66(9):3374-3392. https://doi.org/10.1002/lno.11885

MLA

Vancouver

Herbert LC, Zhu Q, Michaud AB, Laufer-Meiser K, Jones CK, Riedinger N o.a. Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords. Limnology and Oceanography. 2021 sep;66(9):3374-3392. https://doi.org/10.1002/lno.11885

Author

Herbert, Lisa C. ; Zhu, Qingzhi ; Michaud, Alexander B. ; Laufer-Meiser, Katja ; Jones, Christopher K. ; Riedinger, Natascha ; Stooksbury, Zachery S. ; Aller, Robert C. ; Jørgensen, Bo Barker ; Wehrmann, Laura M. / Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords. I: Limnology and Oceanography. 2021 ; Bind 66, Nr. 9. s. 3374-3392.

Bibtex

@article{f523d3499f1b4e08b1d6cdb4c66d7c2f,
title = "Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords",
abstract = "Benthic iron (Fe) fluxes from continental shelf sediments are an important source of Fe to the global ocean, yet the magnitude of these fluxes is not well constrained. Processing of Fe in sediments is of particular importance in the Arctic Ocean, which has a large shelf area and Fe limitation of primary productivity. In the Arctic fjords of Svalbard, glacial weathering delivers high volumes of Fe-rich sediment to the fjord benthos. Benthic redox cycling of Fe proceeds through multiple pathways of reduction (i.e., dissimilatory iron reduction and reduction by hydrogen sulfide) and re-oxidation. There are few estimates of the magnitude and controlling factors of the benthic Fe flux in Arctic fjords. We collected cores from two Svalbard fjords (Kongsfjorden and Lillieh{\"o}{\"o}kfjorden), measured dissolved Fe2+ concentrations using a two-dimensional sensor, and analyzed iron, manganese, carbon, and sulfur species to study benthic Fe fluxes. Benthic fluxes of Fe2+ vary throughout the fjords, with a “sweet spot” mid-fjord controlled by the availability of organic carbon linked to sedimentation rates. The flux is also impacted by fjord circulation and sea ice cover, which influence overall mineralization rates in the sediment. Due to ongoing Arctic warming, we predict an increase in the benthic Fe2+ flux with reduced sea ice cover in some fjords and a decrease in the Fe2+ flux with the retreat of tidewater glaciers in other regions. Decreasing benthic Fe2+ fluxes in fjords may exacerbate Fe limitation of primary productivity in the Arctic Ocean.",
author = "Herbert, {Lisa C.} and Qingzhi Zhu and Michaud, {Alexander B.} and Katja Laufer-Meiser and Jones, {Christopher K.} and Natascha Riedinger and Stooksbury, {Zachery S.} and Aller, {Robert C.} and J{\o}rgensen, {Bo Barker} and Wehrmann, {Laura M.}",
note = "Publisher Copyright: {\textcopyright} 2021 Association for the Sciences of Limnology and Oceanography.",
year = "2021",
month = sep,
doi = "10.1002/lno.11885",
language = "English",
volume = "66",
pages = "3374--3392",
journal = "Limnology and Oceanography",
issn = "0024-3590",
publisher = "JohnWiley & Sons, Inc.",
number = "9",

}

RIS

TY - JOUR

T1 - Benthic iron flux influenced by climate-sensitive interplay between organic carbon availability and sedimentation rate in Arctic fjords

AU - Herbert, Lisa C.

AU - Zhu, Qingzhi

AU - Michaud, Alexander B.

AU - Laufer-Meiser, Katja

AU - Jones, Christopher K.

AU - Riedinger, Natascha

AU - Stooksbury, Zachery S.

AU - Aller, Robert C.

AU - Jørgensen, Bo Barker

AU - Wehrmann, Laura M.

N1 - Publisher Copyright: © 2021 Association for the Sciences of Limnology and Oceanography.

PY - 2021/9

Y1 - 2021/9

N2 - Benthic iron (Fe) fluxes from continental shelf sediments are an important source of Fe to the global ocean, yet the magnitude of these fluxes is not well constrained. Processing of Fe in sediments is of particular importance in the Arctic Ocean, which has a large shelf area and Fe limitation of primary productivity. In the Arctic fjords of Svalbard, glacial weathering delivers high volumes of Fe-rich sediment to the fjord benthos. Benthic redox cycling of Fe proceeds through multiple pathways of reduction (i.e., dissimilatory iron reduction and reduction by hydrogen sulfide) and re-oxidation. There are few estimates of the magnitude and controlling factors of the benthic Fe flux in Arctic fjords. We collected cores from two Svalbard fjords (Kongsfjorden and Lilliehöökfjorden), measured dissolved Fe2+ concentrations using a two-dimensional sensor, and analyzed iron, manganese, carbon, and sulfur species to study benthic Fe fluxes. Benthic fluxes of Fe2+ vary throughout the fjords, with a “sweet spot” mid-fjord controlled by the availability of organic carbon linked to sedimentation rates. The flux is also impacted by fjord circulation and sea ice cover, which influence overall mineralization rates in the sediment. Due to ongoing Arctic warming, we predict an increase in the benthic Fe2+ flux with reduced sea ice cover in some fjords and a decrease in the Fe2+ flux with the retreat of tidewater glaciers in other regions. Decreasing benthic Fe2+ fluxes in fjords may exacerbate Fe limitation of primary productivity in the Arctic Ocean.

AB - Benthic iron (Fe) fluxes from continental shelf sediments are an important source of Fe to the global ocean, yet the magnitude of these fluxes is not well constrained. Processing of Fe in sediments is of particular importance in the Arctic Ocean, which has a large shelf area and Fe limitation of primary productivity. In the Arctic fjords of Svalbard, glacial weathering delivers high volumes of Fe-rich sediment to the fjord benthos. Benthic redox cycling of Fe proceeds through multiple pathways of reduction (i.e., dissimilatory iron reduction and reduction by hydrogen sulfide) and re-oxidation. There are few estimates of the magnitude and controlling factors of the benthic Fe flux in Arctic fjords. We collected cores from two Svalbard fjords (Kongsfjorden and Lilliehöökfjorden), measured dissolved Fe2+ concentrations using a two-dimensional sensor, and analyzed iron, manganese, carbon, and sulfur species to study benthic Fe fluxes. Benthic fluxes of Fe2+ vary throughout the fjords, with a “sweet spot” mid-fjord controlled by the availability of organic carbon linked to sedimentation rates. The flux is also impacted by fjord circulation and sea ice cover, which influence overall mineralization rates in the sediment. Due to ongoing Arctic warming, we predict an increase in the benthic Fe2+ flux with reduced sea ice cover in some fjords and a decrease in the Fe2+ flux with the retreat of tidewater glaciers in other regions. Decreasing benthic Fe2+ fluxes in fjords may exacerbate Fe limitation of primary productivity in the Arctic Ocean.

UR - http://www.scopus.com/inward/record.url?scp=85109387389&partnerID=8YFLogxK

U2 - 10.1002/lno.11885

DO - 10.1002/lno.11885

M3 - Journal article

AN - SCOPUS:85109387389

VL - 66

SP - 3374

EP - 3392

JO - Limnology and Oceanography

JF - Limnology and Oceanography

SN - 0024-3590

IS - 9

ER -