Biolabile ferrous iron bearing nanoparticles in glacial sediments
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 import...
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ftfuberlin:oai:refubium.fu-berlin.de:fub188/22599 2023-05-15T14:57:55+02:00 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 2018 10 Seiten application/pdf https://refubium.fu-berlin.de/handle/fub188/22599 https://doi.org/10.17169/refubium-405 https://doi.org/10.1016/j.epsl.2018.04.022 eng eng https://refubium.fu-berlin.de/handle/fub188/22599 http://dx.doi.org/10.17169/refubium-405 doi:10.1016/j.epsl.2018.04.022 https://creativecommons.org/licenses/by/4.0/ CC-BY glaciers Arctic iron biological pump export-productivity sediment ddc:551 doc-type:article 2018 ftfuberlin https://doi.org/10.17169/refubium-405 https://doi.org/10.1016/j.epsl.2018.04.022 2022-05-15T20:51:02Z 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. Article in Journal/Newspaper Arctic Greenland Ice Sheet Iceberg* Labrador Sea Phytoplankton Freie Universität Berlin: Refubium (FU Berlin) Arctic Greenland |
institution |
Open Polar |
collection |
Freie Universität Berlin: Refubium (FU Berlin) |
op_collection_id |
ftfuberlin |
language |
English |
topic |
glaciers Arctic iron biological pump export-productivity sediment ddc:551 |
spellingShingle |
glaciers Arctic iron biological pump export-productivity sediment ddc:551 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 |
topic_facet |
glaciers Arctic iron biological pump export-productivity sediment ddc:551 |
description |
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. |
format |
Article in Journal/Newspaper |
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 |
author_facet |
Hawkings, Jon R. Benning, Liane G. Raiswell, Rob Kaulich, Burkhard Araki, Tohru Abyaneh, Majid Stockdale, Anthony Koch-Müller, Monika Wadham, Jemma L. Tranter, Martyn |
author_sort |
Hawkings, Jon R. |
title |
Biolabile ferrous iron bearing nanoparticles in glacial sediments |
title_short |
Biolabile ferrous iron bearing nanoparticles in glacial sediments |
title_full |
Biolabile ferrous iron bearing nanoparticles in glacial sediments |
title_fullStr |
Biolabile ferrous iron bearing nanoparticles in glacial sediments |
title_full_unstemmed |
Biolabile ferrous iron bearing nanoparticles in glacial sediments |
title_sort |
biolabile ferrous iron bearing nanoparticles in glacial sediments |
publishDate |
2018 |
url |
https://refubium.fu-berlin.de/handle/fub188/22599 https://doi.org/10.17169/refubium-405 https://doi.org/10.1016/j.epsl.2018.04.022 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet Iceberg* Labrador Sea Phytoplankton |
genre_facet |
Arctic Greenland Ice Sheet Iceberg* Labrador Sea Phytoplankton |
op_relation |
https://refubium.fu-berlin.de/handle/fub188/22599 http://dx.doi.org/10.17169/refubium-405 doi:10.1016/j.epsl.2018.04.022 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.17169/refubium-405 https://doi.org/10.1016/j.epsl.2018.04.022 |
_version_ |
1766330012101771264 |