Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans
The Greenland and Antarctic Ice Sheets cover ~\n10% of global land surface, but are rarely considered as active components of the global iron cycle. The ocean waters around both ice sheets harbour highly productive coastal ecosystems, many of which are iron limited. Measurements of iron concentratio...
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ftpubmed:oai:pubmedcentral.nih.gov:4050262 2023-05-15T13:36:11+02:00 Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans Hawkings, Jon R. Wadham, Jemma L. Tranter, Martyn Raiswell, Rob Benning, Liane G. Statham, Peter J. Tedstone, Andrew Nienow, Peter Lee, Katherine Telling, Jon 2014-05-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4050262 http://www.ncbi.nlm.nih.gov/pubmed/24845560 https://doi.org/10.1038/ncomms4929 en eng Nature Pub. Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24845560 http://dx.doi.org/10.1038/ncomms4929 Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-by/3.0/ This work is licensed under a Creative Commons Attribution 3.0 Unported License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ CC-BY-NC CC-BY Article Text 2014 ftpubmed https://doi.org/10.1038/ncomms4929 2014-06-15T00:50:53Z The Greenland and Antarctic Ice Sheets cover ~\n10% of global land surface, but are rarely considered as active components of the global iron cycle. The ocean waters around both ice sheets harbour highly productive coastal ecosystems, many of which are iron limited. Measurements of iron concentrations in subglacial runoff from a large Greenland Ice Sheet catchment reveal the potential for globally significant export of labile iron fractions to the near-coastal euphotic zone. We estimate that the flux of bioavailable iron associated with glacial runoff is 0.40–2.54 Tg per year in Greenland and 0.06–0.17 Tg per year in Antarctica. Iron fluxes are dominated by a highly reactive and potentially bioavailable nanoparticulate suspended sediment fraction, similar to that identified in Antarctic icebergs. Estimates of labile iron fluxes in meltwater are comparable with aeolian dust fluxes to the oceans surrounding Greenland and Antarctica, and are similarly expected to increase in a warming climate with enhanced melting. Text Antarc* Antarctic Antarctica Greenland Ice Sheet Iceberg* PubMed Central (PMC) Antarctic Greenland Nature Communications 5 1 |
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Article Hawkings, Jon R. Wadham, Jemma L. Tranter, Martyn Raiswell, Rob Benning, Liane G. Statham, Peter J. Tedstone, Andrew Nienow, Peter Lee, Katherine Telling, Jon Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans |
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The Greenland and Antarctic Ice Sheets cover ~\n10% of global land surface, but are rarely considered as active components of the global iron cycle. The ocean waters around both ice sheets harbour highly productive coastal ecosystems, many of which are iron limited. Measurements of iron concentrations in subglacial runoff from a large Greenland Ice Sheet catchment reveal the potential for globally significant export of labile iron fractions to the near-coastal euphotic zone. We estimate that the flux of bioavailable iron associated with glacial runoff is 0.40–2.54 Tg per year in Greenland and 0.06–0.17 Tg per year in Antarctica. Iron fluxes are dominated by a highly reactive and potentially bioavailable nanoparticulate suspended sediment fraction, similar to that identified in Antarctic icebergs. Estimates of labile iron fluxes in meltwater are comparable with aeolian dust fluxes to the oceans surrounding Greenland and Antarctica, and are similarly expected to increase in a warming climate with enhanced melting. |
format |
Text |
author |
Hawkings, Jon R. Wadham, Jemma L. Tranter, Martyn Raiswell, Rob Benning, Liane G. Statham, Peter J. Tedstone, Andrew Nienow, Peter Lee, Katherine Telling, Jon |
author_facet |
Hawkings, Jon R. Wadham, Jemma L. Tranter, Martyn Raiswell, Rob Benning, Liane G. Statham, Peter J. Tedstone, Andrew Nienow, Peter Lee, Katherine Telling, Jon |
author_sort |
Hawkings, Jon R. |
title |
Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans |
title_short |
Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans |
title_full |
Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans |
title_fullStr |
Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans |
title_full_unstemmed |
Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans |
title_sort |
ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans |
publisher |
Nature Pub. Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4050262 http://www.ncbi.nlm.nih.gov/pubmed/24845560 https://doi.org/10.1038/ncomms4929 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Antarctica Greenland Ice Sheet Iceberg* |
genre_facet |
Antarc* Antarctic Antarctica Greenland Ice Sheet Iceberg* |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24845560 http://dx.doi.org/10.1038/ncomms4929 |
op_rights |
Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-by/3.0/ This work is licensed under a Creative Commons Attribution 3.0 Unported License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY-NC CC-BY |
op_doi |
https://doi.org/10.1038/ncomms4929 |
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Nature Communications |
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5 |
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1 |
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1766075315288801280 |