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....
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2013
|
Subjects: | |
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 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:660c131d4e1b4d559279eaecfcd6364a |
---|---|
record_format |
openpolar |
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 |
op_rights |
undefined |
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 |
_version_ |
1766272410546339840 |