Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans
Iceberg-hosted sediments and atmospheric dust transport potentially bioavailable iron to the Arctic and Southern oceans as ferrihydrite. Ferrihydrite is nanoparticulate and more soluble, as well as potentially more bioavailable, than other iron (oxyhydr)oxide minerals (lepidocrocite, goethite, and h...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:29238 2023-05-15T14:52:36+02:00 Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans Raiswell, Robert Hawkings, Jon R. Benning, Liane G. Baker, Alex R. Death, Ros Samuel, Albani A. Mahowald, Natalie Krom, Michael D. Poulton, Simon W. Wadham, Jemma Tranter, Martyn 2016 https://kups.ub.uni-koeln.de/29238/ eng eng COPERNICUS GESELLSCHAFT MBH Raiswell, Robert, Hawkings, Jon R., Benning, Liane G., Baker, Alex R., Death, Ros, Samuel, Albani A., Mahowald, Natalie orcid:0000-0002-2873-997X , Krom, Michael D., Poulton, Simon W., Wadham, Jemma and Tranter, Martyn orcid:0000-0003-2071-3094 (2016). Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans. Biogeosciences, 13 (13). S. 3887 - 3901. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1726-4189 ddc:no doc-type:article publishedVersion 2016 ftubkoeln 2022-11-09T07:22:10Z Iceberg-hosted sediments and atmospheric dust transport potentially bioavailable iron to the Arctic and Southern oceans as ferrihydrite. Ferrihydrite is nanoparticulate and more soluble, as well as potentially more bioavailable, than other iron (oxyhydr)oxide minerals (lepidocrocite, goethite, and hematite). A suite of more than 50 iceberg-hosted sediments contain a mean content of 0.076 wt% Fe as ferrihydrite, which produces iceberg-hosted Fe fluxes ranging from 0.7 to 5.5 and 3.2 to 25 Gmoles yr(-1) to the Arctic and Southern oceans respectively. Atmospheric dust (with little or no combustion products) contains a mean ferrihydrite Fe content of 0.038 wt% (corresponding to a fractional solubility of similar to 1 %) and delivers much smaller Fe fluxes (0.02-0.07 Gmoles yr(-1) to the Arctic Ocean and 0.0-0.02 Gmoles yr(-1) to the Southern Ocean). New dust flux data show that most atmospheric dust is delivered to sea ice where exposure to melting/re-freezing cycles may enhance fractional solubility, and thus fluxes, by a factor of approximately 2.5. Improved estimates for these particulate sources require additional data for the iceberg losses during fjord transit, the sediment content of icebergs, and samples of atmospheric dust delivered to the polar regions. Article in Journal/Newspaper Arctic Arctic Ocean Iceberg* Sea ice Southern Ocean Cologne University: KUPS Arctic Arctic Ocean Southern Ocean |
institution |
Open Polar |
collection |
Cologne University: KUPS |
op_collection_id |
ftubkoeln |
language |
English |
topic |
ddc:no |
spellingShingle |
ddc:no Raiswell, Robert Hawkings, Jon R. Benning, Liane G. Baker, Alex R. Death, Ros Samuel, Albani A. Mahowald, Natalie Krom, Michael D. Poulton, Simon W. Wadham, Jemma Tranter, Martyn Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans |
topic_facet |
ddc:no |
description |
Iceberg-hosted sediments and atmospheric dust transport potentially bioavailable iron to the Arctic and Southern oceans as ferrihydrite. Ferrihydrite is nanoparticulate and more soluble, as well as potentially more bioavailable, than other iron (oxyhydr)oxide minerals (lepidocrocite, goethite, and hematite). A suite of more than 50 iceberg-hosted sediments contain a mean content of 0.076 wt% Fe as ferrihydrite, which produces iceberg-hosted Fe fluxes ranging from 0.7 to 5.5 and 3.2 to 25 Gmoles yr(-1) to the Arctic and Southern oceans respectively. Atmospheric dust (with little or no combustion products) contains a mean ferrihydrite Fe content of 0.038 wt% (corresponding to a fractional solubility of similar to 1 %) and delivers much smaller Fe fluxes (0.02-0.07 Gmoles yr(-1) to the Arctic Ocean and 0.0-0.02 Gmoles yr(-1) to the Southern Ocean). New dust flux data show that most atmospheric dust is delivered to sea ice where exposure to melting/re-freezing cycles may enhance fractional solubility, and thus fluxes, by a factor of approximately 2.5. Improved estimates for these particulate sources require additional data for the iceberg losses during fjord transit, the sediment content of icebergs, and samples of atmospheric dust delivered to the polar regions. |
format |
Article in Journal/Newspaper |
author |
Raiswell, Robert Hawkings, Jon R. Benning, Liane G. Baker, Alex R. Death, Ros Samuel, Albani A. Mahowald, Natalie Krom, Michael D. Poulton, Simon W. Wadham, Jemma Tranter, Martyn |
author_facet |
Raiswell, Robert Hawkings, Jon R. Benning, Liane G. Baker, Alex R. Death, Ros Samuel, Albani A. Mahowald, Natalie Krom, Michael D. Poulton, Simon W. Wadham, Jemma Tranter, Martyn |
author_sort |
Raiswell, Robert |
title |
Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans |
title_short |
Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans |
title_full |
Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans |
title_fullStr |
Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans |
title_full_unstemmed |
Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans |
title_sort |
potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2016 |
url |
https://kups.ub.uni-koeln.de/29238/ |
geographic |
Arctic Arctic Ocean Southern Ocean |
geographic_facet |
Arctic Arctic Ocean Southern Ocean |
genre |
Arctic Arctic Ocean Iceberg* Sea ice Southern Ocean |
genre_facet |
Arctic Arctic Ocean Iceberg* Sea ice Southern Ocean |
op_relation |
Raiswell, Robert, Hawkings, Jon R., Benning, Liane G., Baker, Alex R., Death, Ros, Samuel, Albani A., Mahowald, Natalie orcid:0000-0002-2873-997X , Krom, Michael D., Poulton, Simon W., Wadham, Jemma and Tranter, Martyn orcid:0000-0003-2071-3094 (2016). Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans. Biogeosciences, 13 (13). S. 3887 - 3901. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1726-4189 |
_version_ |
1766323829120958464 |