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Biolabile ferrous iron bearing nanoparticles in glacial sediments

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Biolabile ferrous iron bearing nanoparticles in glacial sediments. / Hawkings, Jon R.; Benning, Liane G.; Raiswell, Rob; Kaulich, Burkhard; Araki, Tohru; Abyaneh, Majid; Stockdale, Anthony; Koch-Müller, Monika; Wadham, Jemma L.; Tranter, Martyn.

In: Earth and Planetary Science Letters, Vol. 493, 01.07.2018, p. 92-101.

Research output: Contribution to journalArticle

Harvard

Hawkings, JR, Benning, LG, Raiswell, R, Kaulich, B, Araki, T, Abyaneh, M, Stockdale, A, Koch-Müller, M, Wadham, JL & Tranter, M 2018, 'Biolabile ferrous iron bearing nanoparticles in glacial sediments', Earth and Planetary Science Letters, vol. 493, pp. 92-101. https://doi.org/10.1016/j.epsl.2018.04.022

APA

Hawkings, J. R., Benning, L. G., Raiswell, R., Kaulich, B., Araki, T., Abyaneh, M., ... Tranter, M. (2018). Biolabile ferrous iron bearing nanoparticles in glacial sediments. Earth and Planetary Science Letters, 493, 92-101. https://doi.org/10.1016/j.epsl.2018.04.022

Vancouver

Hawkings JR, Benning LG, Raiswell R, Kaulich B, Araki T, Abyaneh M et al. Biolabile ferrous iron bearing nanoparticles in glacial sediments. Earth and Planetary Science Letters. 2018 Jul 1;493:92-101. https://doi.org/10.1016/j.epsl.2018.04.022

Author

Hawkings, Jon R. ; Benning, Liane G. ; Raiswell, Rob ; Kaulich, Burkhard ; Araki, Tohru ; Abyaneh, Majid ; Stockdale, Anthony ; Koch-Müller, Monika ; Wadham, Jemma L. ; Tranter, Martyn. / Biolabile ferrous iron bearing nanoparticles in glacial sediments. In: Earth and Planetary Science Letters. 2018 ; Vol. 493. pp. 92-101.

Bibtex

@article{0f0e7d2be1824f2f88ce1a51e5348152,
title = "Biolabile ferrous iron bearing nanoparticles in glacial sediments",
abstract = "Glaciers and ice sheets are a significant source of nanoparticulate Fe, which is potentially important in sustaining the high productivity observed in the near-coastal regions proximal to terrestrial ice cover. However, the bioavailability of particulate iron is poorly understood, despite its importance in the ocean Fe inventory. We combined high-resolution imaging and spectroscopy to investigate the abundance, morphology and valence state of particulate iron in glacial sediments. Our results document the widespread occurrence of amorphous and Fe(II)-rich and Fe(II)-bearing nanoparticles in Arctic glacial meltwaters and iceberg debris, compared to Fe(III)-rich dominated particulates in an aeolian dust sample. Fe(II) is thought to be highly biolabile in marine environments. Our work shows that glacially derived Fe is more labile than previously assumed, and consequently that glaciers and ice sheets are therefore able to export potentially bioavailable Fe(II)-containing nanoparticulate material to downstream ecosystems, including those in a marine setting. Our findings provide further evidence that Greenland Ice Sheet meltwaters may provide biolabile particulate Fe that may fuel the large summer phytoplankton bloom in the Labrador Sea, and that Fe(II)-rich particulates from a region of very high productivity downstream of a polar ice sheet may be glacial in origin.",
keywords = "Arctic, biological pump, export-productivity, glaciers, iron, sediment",
author = "Hawkings, {Jon R.} and Benning, {Liane G.} and Rob Raiswell and Burkhard Kaulich and Tohru Araki and Majid Abyaneh and Anthony Stockdale and Monika Koch-M{\"u}ller and Wadham, {Jemma L.} and Martyn Tranter",
year = "2018",
month = "7",
day = "1",
doi = "10.1016/j.epsl.2018.04.022",
language = "English",
volume = "493",
pages = "92--101",
journal = "Earth and Planetary Science Letters",
issn = "0012-821X",
publisher = "North-Holland Publishing Company",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Biolabile ferrous iron bearing nanoparticles in glacial sediments

AU - Hawkings, Jon R.

AU - Benning, Liane G.

AU - Raiswell, Rob

AU - Kaulich, Burkhard

AU - Araki, Tohru

AU - Abyaneh, Majid

AU - Stockdale, Anthony

AU - Koch-Müller, Monika

AU - Wadham, Jemma L.

AU - Tranter, Martyn

PY - 2018/7/1

Y1 - 2018/7/1

N2 - Glaciers and ice sheets are a significant source of nanoparticulate Fe, which is potentially important in sustaining the high productivity observed in the near-coastal regions proximal to terrestrial ice cover. However, the bioavailability of particulate iron is poorly understood, despite its importance in the ocean Fe inventory. We combined high-resolution imaging and spectroscopy to investigate the abundance, morphology and valence state of particulate iron in glacial sediments. Our results document the widespread occurrence of amorphous and Fe(II)-rich and Fe(II)-bearing nanoparticles in Arctic glacial meltwaters and iceberg debris, compared to Fe(III)-rich dominated particulates in an aeolian dust sample. Fe(II) is thought to be highly biolabile in marine environments. Our work shows that glacially derived Fe is more labile than previously assumed, and consequently that glaciers and ice sheets are therefore able to export potentially bioavailable Fe(II)-containing nanoparticulate material to downstream ecosystems, including those in a marine setting. Our findings provide further evidence that Greenland Ice Sheet meltwaters may provide biolabile particulate Fe that may fuel the large summer phytoplankton bloom in the Labrador Sea, and that Fe(II)-rich particulates from a region of very high productivity downstream of a polar ice sheet may be glacial in origin.

AB - Glaciers and ice sheets are a significant source of nanoparticulate Fe, which is potentially important in sustaining the high productivity observed in the near-coastal regions proximal to terrestrial ice cover. However, the bioavailability of particulate iron is poorly understood, despite its importance in the ocean Fe inventory. We combined high-resolution imaging and spectroscopy to investigate the abundance, morphology and valence state of particulate iron in glacial sediments. Our results document the widespread occurrence of amorphous and Fe(II)-rich and Fe(II)-bearing nanoparticles in Arctic glacial meltwaters and iceberg debris, compared to Fe(III)-rich dominated particulates in an aeolian dust sample. Fe(II) is thought to be highly biolabile in marine environments. Our work shows that glacially derived Fe is more labile than previously assumed, and consequently that glaciers and ice sheets are therefore able to export potentially bioavailable Fe(II)-containing nanoparticulate material to downstream ecosystems, including those in a marine setting. Our findings provide further evidence that Greenland Ice Sheet meltwaters may provide biolabile particulate Fe that may fuel the large summer phytoplankton bloom in the Labrador Sea, and that Fe(II)-rich particulates from a region of very high productivity downstream of a polar ice sheet may be glacial in origin.

KW - Arctic

KW - biological pump

KW - export-productivity

KW - glaciers

KW - iron

KW - sediment

UR - http://www.scopus.com/inward/record.url?scp=85046091584&partnerID=8YFLogxK

U2 - 10.1016/j.epsl.2018.04.022

DO - 10.1016/j.epsl.2018.04.022

M3 - Article

VL - 493

SP - 92

EP - 101

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

ER -