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...
Published in: | Nature Communications |
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2014
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Online Access: | https://pure.au.dk/portal/da/publications/ice-sheets-as-a-significant-source-of-highly-reactive-nanoparticulate-iron-to-the-oceans(ed5f42b0-b3c4-4b90-9e5b-58ff4fd7f6ba).html https://doi.org/10.1038/ncomms4929 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/ed5f42b0-b3c4-4b90-9e5b-58ff4fd7f6ba 2023-05-15T14:06:36+02:00 Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans Hawkings, Jon Wadham, Jemma Tranter, Martyn Raiswell, Rob Benning, Liane G. Statham, Peter J. Tedstone, Andrew Nienow, Peter Lee, Katherine Telling, Jon 2014-05-21 https://pure.au.dk/portal/da/publications/ice-sheets-as-a-significant-source-of-highly-reactive-nanoparticulate-iron-to-the-oceans(ed5f42b0-b3c4-4b90-9e5b-58ff4fd7f6ba).html https://doi.org/10.1038/ncomms4929 eng eng info:eu-repo/semantics/restrictedAccess Hawkings , J , Wadham , J , Tranter , M , Raiswell , R , Benning , L G , Statham , P J , Tedstone , A , Nienow , P , Lee , K & Telling , J 2014 , ' Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans ' , Nature Communications , vol. 5 . https://doi.org/10.1038/ncomms4929 article 2014 ftuniaarhuspubl https://doi.org/10.1038/ncomms4929 2023-03-01T23:56:30Z 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 0.40-2.54â €‰Tg per year in Greenland and 0.06-0.17â €‰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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland Ice Sheet Iceberg* Aarhus University: Research Antarctic Greenland Nature Communications 5 1 |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
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 0.40-2.54â €‰Tg per year in Greenland and 0.06-0.17â €‰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 |
Article in Journal/Newspaper |
author |
Hawkings, Jon Wadham, Jemma Tranter, Martyn Raiswell, Rob Benning, Liane G. Statham, Peter J. Tedstone, Andrew Nienow, Peter Lee, Katherine Telling, Jon |
spellingShingle |
Hawkings, Jon Wadham, Jemma 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 |
author_facet |
Hawkings, Jon Wadham, Jemma Tranter, Martyn Raiswell, Rob Benning, Liane G. Statham, Peter J. Tedstone, Andrew Nienow, Peter Lee, Katherine Telling, Jon |
author_sort |
Hawkings, Jon |
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 |
publishDate |
2014 |
url |
https://pure.au.dk/portal/da/publications/ice-sheets-as-a-significant-source-of-highly-reactive-nanoparticulate-iron-to-the-oceans(ed5f42b0-b3c4-4b90-9e5b-58ff4fd7f6ba).html 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_source |
Hawkings , J , Wadham , J , Tranter , M , Raiswell , R , Benning , L G , Statham , P J , Tedstone , A , Nienow , P , Lee , K & Telling , J 2014 , ' Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans ' , Nature Communications , vol. 5 . https://doi.org/10.1038/ncomms4929 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/ncomms4929 |
container_title |
Nature Communications |
container_volume |
5 |
container_issue |
1 |
_version_ |
1766278597584093184 |