Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr
Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates....
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ftdoajarticles:oai:doaj.org/article:660c131d4e1b4d559279eaecfcd6364a 2023-05-15T13:47:23+02:00 Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr P. Vallelonga C. Barbante G. Cozzi J. Gabrieli S. Schüpbach A. Spolaor C. Turetta 2013-03-01T00:00:00Z https://doi.org/10.5194/cp-9-597-2013 https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a EN eng Copernicus Publications http://www.clim-past.net/9/597/2013/cp-9-597-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-597-2013 1814-9324 1814-9332 https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a Climate of the Past, Vol 9, Iss 2, Pp 597-604 (2013) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2013 ftdoajarticles https://doi.org/10.5194/cp-9-597-2013 2022-12-31T03:09:24Z Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates. We observe different Fe flux trends at Dome C and Talos Dome during the deglaciation and early Holocene, attributed to a combination of deglacial activation of dust sources local to Talos Dome and the reorganisation of atmospheric transport pathways with the retreat of the Ross Sea ice shelf. This supports similar findings based on dust particle sizes and fluxes and Rare Earth Element fluxes. We show that Ca and Fe should not be used as quantitative proxies for mineral dust, as they all demonstrate different deglacial trends at Talos Dome and Dome C. Considering that a 20 ppmv decrease in atmospheric CO 2 at the coldest part of the last glacial maximum occurs contemporaneously with the period of greatest Fe and dust flux to Antarctica, we confirm that the maximum contribution of aeolian dust deposition to Southern Ocean sequestration of atmospheric CO 2 is approximately 20 ppmv. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Shelf Ross Sea Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean Ross Sea Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Climate of the Past 9 2 597 604 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 P. Vallelonga C. Barbante G. Cozzi J. Gabrieli S. Schüpbach A. Spolaor C. Turetta Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates. We observe different Fe flux trends at Dome C and Talos Dome during the deglaciation and early Holocene, attributed to a combination of deglacial activation of dust sources local to Talos Dome and the reorganisation of atmospheric transport pathways with the retreat of the Ross Sea ice shelf. This supports similar findings based on dust particle sizes and fluxes and Rare Earth Element fluxes. We show that Ca and Fe should not be used as quantitative proxies for mineral dust, as they all demonstrate different deglacial trends at Talos Dome and Dome C. Considering that a 20 ppmv decrease in atmospheric CO 2 at the coldest part of the last glacial maximum occurs contemporaneously with the period of greatest Fe and dust flux to Antarctica, we confirm that the maximum contribution of aeolian dust deposition to Southern Ocean sequestration of atmospheric CO 2 is approximately 20 ppmv. |
format |
Article in Journal/Newspaper |
author |
P. Vallelonga C. Barbante G. Cozzi J. Gabrieli S. Schüpbach A. Spolaor C. Turetta |
author_facet |
P. Vallelonga C. Barbante G. Cozzi J. Gabrieli S. Schüpbach A. Spolaor C. Turetta |
author_sort |
P. Vallelonga |
title |
Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr |
title_short |
Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr |
title_full |
Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr |
title_fullStr |
Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr |
title_full_unstemmed |
Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr |
title_sort |
iron fluxes to talos dome, antarctica, over the past 200 kyr |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-597-2013 https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic Southern Ocean Ross Sea Talos Dome |
geographic_facet |
Antarctic Southern Ocean Ross Sea Talos Dome |
genre |
Antarc* Antarctic Antarctica ice core Ice Shelf Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Shelf Ross Sea Sea ice Southern Ocean |
op_source |
Climate of the Past, Vol 9, Iss 2, Pp 597-604 (2013) |
op_relation |
http://www.clim-past.net/9/597/2013/cp-9-597-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-597-2013 1814-9324 1814-9332 https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a |
op_doi |
https://doi.org/10.5194/cp-9-597-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
container_start_page |
597 |
op_container_end_page |
604 |
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1766247063589224448 |