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| Titel |
Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales |
| VerfasserIn |
S. Albani, B. Delmonte, V. Maggi, C. Baroni, J.-R. Petit, B. Stenni, C. Mazzola, M. Frezzotti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 8, no. 2 ; Nr. 8, no. 2 (2012-04-04), S.741-750 |
| Datensatznummer |
250005481
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| Publikation (Nr.) |
 copernicus.org/cp-8-741-2012.pdf |
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| Zusammenfassung |
| 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. |
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