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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Published in:Climate of the Past
Main Authors: P. Vallelonga, C. Barbante, G. Cozzi, J. Gabrieli, S. Schüpbach, A. Spolaor, C. Turetta
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2013
Subjects:
geo
Online Access:https://doi.org/10.5194/cp-9-597-2013
http://www.clim-past.net/9/597/2013/cp-9-597-2013.pdf
https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a
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spelling fttriple:oai:gotriple.eu:oai:doaj.org/article:660c131d4e1b4d559279eaecfcd6364a 2023-05-15T14:02:15+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 2013-03-01 https://doi.org/10.5194/cp-9-597-2013 http://www.clim-past.net/9/597/2013/cp-9-597-2013.pdf https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a en eng Copernicus Publications doi:10.5194/cp-9-597-2013 1814-9324 1814-9332 http://www.clim-past.net/9/597/2013/cp-9-597-2013.pdf https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a undefined Climate of the Past, Vol 9, Iss 2, Pp 597-604 (2013) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/cp-9-597-2013 2023-01-22T19:28:13Z 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 CO2 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 CO2 is approximately 20 ppmv. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Shelf Ross Sea Sea ice Southern Ocean Unknown Antarctic Ross Sea Southern Ocean Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Climate of the Past 9 2 597 604
institution Open Polar
collection Unknown
op_collection_id fttriple
language English
topic geo
envir
spellingShingle geo
envir
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 geo
envir
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 CO2 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 CO2 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
http://www.clim-past.net/9/597/2013/cp-9-597-2013.pdf
https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a
long_lat ENVELOPE(158.000,158.000,-73.000,-73.000)
geographic Antarctic
Ross Sea
Southern Ocean
Talos Dome
geographic_facet Antarctic
Ross Sea
Southern Ocean
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 doi:10.5194/cp-9-597-2013
1814-9324
1814-9332
http://www.clim-past.net/9/597/2013/cp-9-597-2013.pdf
https://doaj.org/article/660c131d4e1b4d559279eaecfcd6364a
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container_title Climate of the Past
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container_issue 2
container_start_page 597
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