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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Online Access: | https://eprints.whiterose.ac.uk/112467/ https://eprints.whiterose.ac.uk/112467/1/Hodson_et_al-2017-Nature_Communications.pdf https://doi.org/10.1038/ncomms14499 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:112467 2023-05-15T13:49:59+02:00 Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff Hodson, A. Nowak, A. Sabacka, M. Jungblut, A. Navarro, F. Pearce, D. Ávila-Jiménez, M.L. Convey, P. Vieira, G. 2017-02-15 text https://eprints.whiterose.ac.uk/112467/ https://eprints.whiterose.ac.uk/112467/1/Hodson_et_al-2017-Nature_Communications.pdf https://doi.org/10.1038/ncomms14499 en eng Nature Publishing Group https://eprints.whiterose.ac.uk/112467/1/Hodson_et_al-2017-Nature_Communications.pdf Hodson, A. orcid.org/0000-0002-1255-7987 , Nowak, A., Sabacka, M. et al. (6 more authors) (2017) Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff. Nature Communications, 8. 14499 (2017). ISSN 2041-1723 cc_by_4 CC-BY Article PeerReviewed 2017 ftleedsuniv https://doi.org/10.1038/ncomms14499 2023-01-30T21:51:53Z 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 White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic Southern Ocean The Antarctic Nature Communications 8 1 |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
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, A. Nowak, A. Sabacka, M. Jungblut, A. Navarro, F. Pearce, D. Ávila-Jiménez, M.L. Convey, P. Vieira, G. |
spellingShingle |
Hodson, A. Nowak, A. Sabacka, M. Jungblut, A. Navarro, F. Pearce, D. Ávila-Jiménez, M.L. Convey, P. Vieira, G. Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
author_facet |
Hodson, A. Nowak, A. Sabacka, M. Jungblut, A. Navarro, F. Pearce, D. Ávila-Jiménez, M.L. Convey, P. Vieira, G. |
author_sort |
Hodson, A. |
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 |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
https://eprints.whiterose.ac.uk/112467/ https://eprints.whiterose.ac.uk/112467/1/Hodson_et_al-2017-Nature_Communications.pdf https://doi.org/10.1038/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://eprints.whiterose.ac.uk/112467/1/Hodson_et_al-2017-Nature_Communications.pdf Hodson, A. orcid.org/0000-0002-1255-7987 , Nowak, A., Sabacka, M. et al. (6 more authors) (2017) Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff. Nature Communications, 8. 14499 (2017). ISSN 2041-1723 |
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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1766252676047175680 |