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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

TitleAeolian dust in the Talos Dome ice core (East Antarctica, Pacific/Ross Sea sector): Victoria Land versus remote sources over the last two climate cycles
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2010
AuthorsDelmonte, B., Baroni C., Andersson P.S., Schoberg H., Hansson M., Aciego S., Petit J.-R., Albani S., Mazzola C., Maggi V., and Frezzotti M
JournalJournal of Quaternary Science
Volume25
Pagination1327-1337
ISSN02678179
KeywordsAir mass, antarctica, climate cycle, climate variation, East Antarctica, eolian deposit, Holocene, Ice core, isotopic composition, neodymium isotope, Pacific Ocean, paleoclimate, Pleistocene, Ross Sea, Southern Ocean, strontium isotope, Talos Dome
Abstract

A new ice core (TALDICE) drilled at Talos Dome (East Antarctica, Ross Sea sector) preserves a ca. 250-ka long record of palaeoclimate and atmospheric history. We investigate dust variability and provenance at the site during glacial periods and the Holocene through the Sr-Nd isotopic composition of ice core dust and potential source areas (PSA). We provide new isotopic data on dust sources from Victoria Land such as regoliths, glacial drifts, aeolian sands and beach deposits. Some of these sources are located at high altitude and are known to have been ice free throughout the Pleistocene. The major features of the TALDICE dust record are very similar to those from central East Antarctica. During glacial times, South America was the dominant dust supplier for Talos Dome as well as for the entire East Antarctic plateau. Conversely, during the Holocene the principal input of mineral dust at Talos Dome probably derives from proximal sources which are the ice-free areas of northern Victoria Land, located at similar altitude with respect to the drilling site. Atmospheric mobilisation of dust from these neighbouring areas and transport inland to Talos Dome can be ultimately associated with advection of maritime air masses from the Pacific/Ross Sea region. © 2010 John Wiley & Sons, Ltd.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-78649610222&doi=10.1002%2fjqs.1418&partnerID=40&md5=9646897e64f9f374f5af3dc754373f81
DOI10.1002/jqs.1418
Citation KeyDelmonte20101327