Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff
Iron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic...
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ftnerc:oai:nora.nerc.ac.uk:513712 2023-05-15T13:49:32+02:00 Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Ann Navarro, Francisco Pearce, David Convey, Peter Vieira, Goncalo 2017-02-15 text http://nora.nerc.ac.uk/id/eprint/513712/ https://nora.nerc.ac.uk/id/eprint/513712/1/ncomms14499.pdf http://www.nature.com/articles/ncomms14499 en eng https://nora.nerc.ac.uk/id/eprint/513712/1/ncomms14499.pdf Hodson, Andy; Nowak, Aga; Sabacka, Marie; Jungblut, Ann; Navarro, Francisco; Pearce, David; Convey, Peter orcid:0000-0001-8497-9903 Vieira, Goncalo. 2017 Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff. Nature Communications, 8, 14499. 7, pp. https://doi.org/10.1038/ncomms14499 <https://doi.org/10.1038/ncomms14499> cc_by_4 CC-BY Chemistry Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1038/ncomms14499 2023-02-04T19:43:06Z Iron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic exports more filterable (<0.45 μm) iron (6–81 kg km−2 a−1) than icebergs (0.0–1.2 kg km−2 a−1). Glacier-fed streams also export more acid-soluble iron (27.0–18,500 kg km−2 a−1) associated with suspended sediment than icebergs (0–241 kg km−2 a−1). Significant fluxes of filterable and sediment-derived iron (1–10 Gg a−1 and 100–1,000 Gg a−1, respectively) are therefore likely to be delivered by runoff from the Antarctic continent. Although estuarine removal processes will greatly reduce their availability to coastal ecosystems, our results clearly indicate that riverine iron fluxes need to be accounted for as the volume of Antarctic melt increases in response to 21st century climate change. Article in Journal/Newspaper Antarc* Antarctic Iceberg* Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Nature Communications 8 1 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
topic |
Chemistry |
spellingShingle |
Chemistry Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Ann Navarro, Francisco Pearce, David Convey, Peter Vieira, Goncalo Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
topic_facet |
Chemistry |
description |
Iron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic exports more filterable (<0.45 μm) iron (6–81 kg km−2 a−1) than icebergs (0.0–1.2 kg km−2 a−1). Glacier-fed streams also export more acid-soluble iron (27.0–18,500 kg km−2 a−1) associated with suspended sediment than icebergs (0–241 kg km−2 a−1). Significant fluxes of filterable and sediment-derived iron (1–10 Gg a−1 and 100–1,000 Gg a−1, respectively) are therefore likely to be delivered by runoff from the Antarctic continent. Although estuarine removal processes will greatly reduce their availability to coastal ecosystems, our results clearly indicate that riverine iron fluxes need to be accounted for as the volume of Antarctic melt increases in response to 21st century climate change. |
format |
Article in Journal/Newspaper |
author |
Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Ann Navarro, Francisco Pearce, David Convey, Peter Vieira, Goncalo |
author_facet |
Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Ann Navarro, Francisco Pearce, David Convey, Peter Vieira, Goncalo |
author_sort |
Hodson, Andy |
title |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_short |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_full |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_fullStr |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_full_unstemmed |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_sort |
climatically sensitive transfer of iron to maritime antarctic ecosystems by surface runoff |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/513712/ https://nora.nerc.ac.uk/id/eprint/513712/1/ncomms14499.pdf http://www.nature.com/articles/ncomms14499 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Iceberg* Southern Ocean |
genre_facet |
Antarc* Antarctic Iceberg* Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/513712/1/ncomms14499.pdf Hodson, Andy; Nowak, Aga; Sabacka, Marie; Jungblut, Ann; Navarro, Francisco; Pearce, David; Convey, Peter orcid:0000-0001-8497-9903 Vieira, Goncalo. 2017 Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff. Nature Communications, 8, 14499. 7, pp. https://doi.org/10.1038/ncomms14499 <https://doi.org/10.1038/ncomms14499> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms14499 |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
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1766251532655788032 |