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Interpreting Last Glacial to Holocene Dust Changes at Talos Dome (East Antarctica): Implications for Atmospheric Variations from Regional to Hemispheric Scales : Volume 8, Issue 2 (04/04/2012)

By Albani, S.

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Book Id: WPLBN0004006445
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Interpreting Last Glacial to Holocene Dust Changes at Talos Dome (East Antarctica): Implications for Atmospheric Variations from Regional to Hemispheric Scales : Volume 8, Issue 2 (04/04/2012)  
Author: Albani, S.
Volume: Vol. 8, Issue 2
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Petit, J., Albani, S., Delmonte, B., Stenni, B., Baroni, C., Mazzola, C.,...Frezzotti, M. (2012). Interpreting Last Glacial to Holocene Dust Changes at Talos Dome (East Antarctica): Implications for Atmospheric Variations from Regional to Hemispheric Scales : Volume 8, Issue 2 (04/04/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Environmental Sciences, University of Milano-Bicocca, Milan, Italy. 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.

Summary
Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales

Excerpt
Albani, S., Mahowald, N. M., Delmonte, B., Maggi, V., and Winckler, G.: Comparing modeled and observed changes in mineral dust transport and deposition to Antarctica between the Last Glacial Maximum and current climates, Clim. Dynam., online first: doi:10.1007/s00382-011-1139-5, 2011.; Baroni, C. and Hall, B. L.: A new Holocene relative sea-level curve for Terra Nova Bay, Victoria Land, Antarctica, J. Quaternary Sci., 19, 377–396, 2004.; Baroni, C. and Orombelli, G.: Holocene raised beaches at Terra Nova Bay, Victoria Land, Antarctica, Quaternary Res., 36, 157–177, 1991.; Baroni, C., Frezzotti, M., Salvatore, M. C., Meneghel, M., Tabacco, I. E., Vittuari, L., Bondesan, A., Biasini, A., Cimbelli, A., and Orombelli, G.: Antarctic Geomorphological and Glaciological 1:250,000 map series. Mt. Murchison Quadrangle (northern Victoria Land). Explanatory notes. (with geomorphological map at the scale of 1:250.000), Ann. Glaciol., 39, 256–264, 2005.; Bory, A., Wolff, E., Mulvaney, R., Jagoutz, E., Wegner, A., Ruth, U., and Elderfield, H.: Multiple sources supply eolian mineral dust to the Atlantic sector of coastal Antarctica: Evidence from recent snow layers at the top of Berkner Island ice sheet, Earth Planet. Sc. Lett., 291, 138–148, 2010.; Buiron, D., Chappellaz, J., Stenni, B., Frezzotti, M., Baumgartner, M., Capron, E., Landais, A., Lemieux-Dudon, B., Masson-Delmotte, V., Montagnat, M., Parrenin, F., and Schilt, A.: TALDICE-1 age scale of the Talos Dome deep ice core, East Antarctica, Clim. Past, 7, 1–16, doi:10.5194/cp-7-1-2011, 2011.; Hall, B. L.: Holocene glacial history of Antarctica and the sub-Antarctic islands, Quaternary Sci. Rev., 28, 2213–2230, 2009.; Carrasco, J. F., Bromwich, D. H., and Monaghan, A. J.: Distribution and characteristics of mesoscale cyclones in the Antarctic: Ross Seas Eastward to the Weddell Sea, Mon. Weather Rev., 131, 289–301, 2003.; Conway, H., Hall, B. L., Denton, G. H., Gades, A. M., and Waddington, E. D.: Past and future grounding-line retreat of the Western Antarctic Ice Sheet, Science, 286, 280–283, 1999.; Delmonte, B., Petit, J.-R., Andersen, K. K., Basile-Doelsch, I., Maggi, V., and Ya Lipenkov, V.: Dust size evidence for opposite regional atmospheric circulation changes over east Antarctica during the last climatic transition, Clim. Dynam., 23, 427–438, 2004.; Delmonte, B., Petit, J.-R., Krinner, G., Maggi, V., Jouzel, J., and Udisti, R.: Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene, Clim. Dynam., 24, 641–654, 2005.; Delmonte, B., Andersson, P. S., Hansson, M., Schöberg, H., Petit, J.-R., Basile-Doelsch, I., and Maggi, V.: Aeolian dust in East Antarctica (EPICA-Dome C and Vostok): Provenance during glacial ages over the last 800 kyr, Geophys. Res. Lett., 35, L07703, doi:10.1029/2008GL033382, 2008.; Delmonte, B., Andersson, P. S., Schöberg, H., Hansson, M., Petit, J.-R., Delmas, R., Gaiero, D. M., Maggi, V., and Frezzotti, M.: Geographic provenance of aeolian dust in East Antarctica during Pleistocene glaciations: preliminary results from Talos Dome and comparison with East Antarctic and new Andean ice core data, Quaternary Sci. Rev., 29, 256–264, 2010a.; Delmonte, B., Baroni, C., Andersson, P. S., Schöberg, H., Hansson, M., Aciego, S., Petit, J.-R., Albani, S., Mazzola, C., Maggi, V., and Frezzotti, M.: Aeolian dust in the Talos Dome ice core (East Antarctica, Pacific/Ross Sea sector): Victoria Land versus remote sources over the last two climate cycles, J. Quaternary Sci., 25, 1327–1337, 2010b.; EPICA Community Members: Eight glacial cycles from an Antarctic ice core, Nature, 429, 623–628, 2004.; Delmonte, B., Andersson, P. S., Baroni, C., Narcisi, B., Petit, J. R., Salvatore, M. C., Albani, S., and Mag

 

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