Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans.
The Greenland and Antarctic Ice Sheets cover ~ 10% 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 concentration...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature Publishing Group
2014
|
Subjects: | |
Online Access: | https://eprints.whiterose.ac.uk/80233/ https://eprints.whiterose.ac.uk/80233/1/Ice%20sheets%20as%20a%20significant%20source%20of%20highly%20reactive%20nanoparticulate%20iron%20to%20the%20oceans.pdf https://doi.org/10.1038/ncomms4929 |
id |
ftleedsuniv:oai:eprints.whiterose.ac.uk:80233 |
---|---|
record_format |
openpolar |
spelling |
ftleedsuniv:oai:eprints.whiterose.ac.uk:80233 2023-05-15T13:41:04+02:00 Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans. Hawkings, JR Wadham, JL Tranter, M Raiswell, R Benning, LG Statham, PJ Tedstone, A Nienow, P Lee, K Telling, J 2014-05-21 text https://eprints.whiterose.ac.uk/80233/ https://eprints.whiterose.ac.uk/80233/1/Ice%20sheets%20as%20a%20significant%20source%20of%20highly%20reactive%20nanoparticulate%20iron%20to%20the%20oceans.pdf https://doi.org/10.1038/ncomms4929 en eng Nature Publishing Group https://eprints.whiterose.ac.uk/80233/1/Ice%20sheets%20as%20a%20significant%20source%20of%20highly%20reactive%20nanoparticulate%20iron%20to%20the%20oceans.pdf Hawkings, JR, Wadham, JL, Tranter, M et al. (7 more authors) (2014) Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans. Nature Communications, 5. 3939. pp. 1-8. ISSN 2041-1723 cc_by_3 CC-BY Article NonPeerReviewed 2014 ftleedsuniv https://doi.org/10.1038/ncomms4929 2023-01-30T21:28:32Z The Greenland and Antarctic Ice Sheets cover ~ 10% 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland Ice Sheet Iceberg* White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic Greenland Nature Communications 5 1 |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
The Greenland and Antarctic Ice Sheets cover ~ 10% 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 |
Article in Journal/Newspaper |
author |
Hawkings, JR Wadham, JL Tranter, M Raiswell, R Benning, LG Statham, PJ Tedstone, A Nienow, P Lee, K Telling, J |
spellingShingle |
Hawkings, JR Wadham, JL Tranter, M Raiswell, R Benning, LG Statham, PJ Tedstone, A Nienow, P Lee, K Telling, J Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans. |
author_facet |
Hawkings, JR Wadham, JL Tranter, M Raiswell, R Benning, LG Statham, PJ Tedstone, A Nienow, P Lee, K Telling, J |
author_sort |
Hawkings, JR |
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 Publishing Group |
publishDate |
2014 |
url |
https://eprints.whiterose.ac.uk/80233/ https://eprints.whiterose.ac.uk/80233/1/Ice%20sheets%20as%20a%20significant%20source%20of%20highly%20reactive%20nanoparticulate%20iron%20to%20the%20oceans.pdf 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 |
https://eprints.whiterose.ac.uk/80233/1/Ice%20sheets%20as%20a%20significant%20source%20of%20highly%20reactive%20nanoparticulate%20iron%20to%20the%20oceans.pdf Hawkings, JR, Wadham, JL, Tranter, M et al. (7 more authors) (2014) Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans. Nature Communications, 5. 3939. pp. 1-8. ISSN 2041-1723 |
op_rights |
cc_by_3 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms4929 |
container_title |
Nature Communications |
container_volume |
5 |
container_issue |
1 |
_version_ |
1766145468630302720 |