Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales
Central East Antarctic ice cores preserve stratigraphic records of mineral dust originating from remote sources in the Southern Hemisphere, and represent useful indicators of climatic variations on glacial-interglacial time scales. The peripheries of the East Antarctic Ice Sheet, where ice-free area...
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ftcopernicus:oai:publications.copernicus.org:cp13876 2023-05-15T13:36:36+02:00 Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales Albani, S. Delmonte, B. Maggi, V. Baroni, C. Petit, J.-R. Stenni, B. Mazzola, C. Frezzotti, M. 2018-09-27 application/pdf https://doi.org/10.5194/cp-8-741-2012 https://cp.copernicus.org/articles/8/741/2012/ eng eng doi:10.5194/cp-8-741-2012 https://cp.copernicus.org/articles/8/741/2012/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-8-741-2012 2020-07-20T16:25:51Z Central East Antarctic ice cores preserve stratigraphic records of mineral dust originating from remote sources in the Southern Hemisphere, and represent useful indicators of climatic variations on glacial-interglacial time scales. The peripheries of the East Antarctic Ice Sheet, where ice-free areas with the potential to emit dust exist, have been less explored from this point of view. Here, we present a new profile of dust deposition flux and grain size distributions from an ice core drilled at Talos Dome (TALDICE, Northern Victoria Land, East Antarctica), where there is a significant input of dust from proximal Antarctic ice-free areas. We analyze dust and stable water isotopes variations from the Last Glacial Maximum to the Late Holocene, and compare them to the EPICA Dome C profiles from central East Antarctica. The smaller glacial-interglacial variations at Talos Dome compared to Dome C and a distinctive decreasing trend during the Holocene characterize the TALDICE dust profile. By deciphering the composite dust signal from both remote and local sources, we show the potential of this combined proxy of source activity and atmospheric transport to give information on both regional and larger spatial scales. In particular, we show how a regional signal, which we relate to the deglaciation history of the Ross Sea embayment, can be superimposed to the broader scale glacial-interglacial variability that characterizes other Antarctic sites. Text Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Ross Sea Victoria Land Copernicus Publications: E-Journals Antarctic East Antarctic Ice Sheet East Antarctica Ross Sea Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Victoria Land Climate of the Past 8 2 741 750 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
Central East Antarctic ice cores preserve stratigraphic records of mineral dust originating from remote sources in the Southern Hemisphere, and represent useful indicators of climatic variations on glacial-interglacial time scales. The peripheries of the East Antarctic Ice Sheet, where ice-free areas with the potential to emit dust exist, have been less explored from this point of view. Here, we present a new profile of dust deposition flux and grain size distributions from an ice core drilled at Talos Dome (TALDICE, Northern Victoria Land, East Antarctica), where there is a significant input of dust from proximal Antarctic ice-free areas. We analyze dust and stable water isotopes variations from the Last Glacial Maximum to the Late Holocene, and compare them to the EPICA Dome C profiles from central East Antarctica. The smaller glacial-interglacial variations at Talos Dome compared to Dome C and a distinctive decreasing trend during the Holocene characterize the TALDICE dust profile. By deciphering the composite dust signal from both remote and local sources, we show the potential of this combined proxy of source activity and atmospheric transport to give information on both regional and larger spatial scales. In particular, we show how a regional signal, which we relate to the deglaciation history of the Ross Sea embayment, can be superimposed to the broader scale glacial-interglacial variability that characterizes other Antarctic sites. |
format |
Text |
author |
Albani, S. Delmonte, B. Maggi, V. Baroni, C. Petit, J.-R. Stenni, B. Mazzola, C. Frezzotti, M. |
spellingShingle |
Albani, S. Delmonte, B. Maggi, V. Baroni, C. Petit, J.-R. Stenni, B. Mazzola, C. Frezzotti, M. Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales |
author_facet |
Albani, S. Delmonte, B. Maggi, V. Baroni, C. Petit, J.-R. Stenni, B. Mazzola, C. Frezzotti, M. |
author_sort |
Albani, S. |
title |
Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales |
title_short |
Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales |
title_full |
Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales |
title_fullStr |
Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales |
title_full_unstemmed |
Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales |
title_sort |
interpreting last glacial to holocene dust changes at talos dome (east antarctica): implications for atmospheric variations from regional to hemispheric scales |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-8-741-2012 https://cp.copernicus.org/articles/8/741/2012/ |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic East Antarctic Ice Sheet East Antarctica Ross Sea Talos Dome Victoria Land |
geographic_facet |
Antarctic East Antarctic Ice Sheet East Antarctica Ross Sea Talos Dome Victoria Land |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Ross Sea Victoria Land |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-8-741-2012 https://cp.copernicus.org/articles/8/741/2012/ |
op_doi |
https://doi.org/10.5194/cp-8-741-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
2 |
container_start_page |
741 |
op_container_end_page |
750 |
_version_ |
1766081214217715712 |