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Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation

Wegner, Anna; Gabrielli, P.; Wilhelms-Dick, D.; Ruth, U.; Kriews, Michael; De Deckker, Patrick; Barbante, C.; Cozzi, G.; Delmonte, B.; Fischer, H.

Description

We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centennial resolution. Additionally, samples from potential source areas (PSAs) for Antarctic dust were analyzed for their REE characteristics. The dust provenance is discussed by comparing the REE...[Show more]

dc.contributor.authorWegner, Anna
dc.contributor.authorGabrielli, P.
dc.contributor.authorWilhelms-Dick, D.
dc.contributor.authorRuth, U.
dc.contributor.authorKriews, Michael
dc.contributor.authorDe Deckker, Patrick
dc.contributor.authorBarbante, C.
dc.contributor.authorCozzi, G.
dc.contributor.authorDelmonte, B.
dc.contributor.authorFischer, H.
dc.date.accessioned2015-12-10T22:20:56Z
dc.identifier.issn1814-9340
dc.identifier.urihttp://hdl.handle.net/1885/52158
dc.description.abstractWe present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centennial resolution. Additionally, samples from potential source areas (PSAs) for Antarctic dust were analyzed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints in the ice core and the PSA samples. We find a shift in variability in REE composition at ∼15 000 yr BP in the ice core samples. Before 15 000 yr BP, the dust composition is very uniform and its provenance was most certainly dominated by a South American source. After 15 000 yr BP, multiple sources such as Australia and New Zealand become relatively more important, although South America remains the major dust source. A similar change in the dust characteristics was observed in the EPICA Dome C ice core at around ∼15 000 yr BP, accompanied by a shift in the REE composition, thus suggesting a change of atmospheric circulation in the Southern Hemisphere.
dc.publisherCopernicus GmbH
dc.sourceClimate of the Past Discussions
dc.subjectKeywords: atmospheric circulation; dome; dust; Holocene; ice core; Last Glacial; paleoclimate; rare earth element; sampling; Southern Hemisphere; Antarctic Plateau; Antarctica; Australia; East Antarctica; New Zealand; Queen Maud Land
dc.titleChange in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume8
dc.date.issued2012
local.identifier.absfor040303 - Geochronology
local.identifier.ariespublicationu4047674xPUB240
local.type.statusPublished Version
local.contributor.affiliationWegner, Anna, Alfred Wegener Institute for Polar and Marine Research
local.contributor.affiliationGabrielli, P., Institute for the Dynamics of Environmental Processes, CNR
local.contributor.affiliationWilhelms-Dick, D., Alfred Wegener Institute for Polar and Marine Research
local.contributor.affiliationRuth, U., Climate Analysis and Consulting
local.contributor.affiliationKriews, Michael, Alfred Wegener Institute for Polar and Marine Research
local.contributor.affiliationDe Deckker, Patrick, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationBarbante, C., Institute for the Dynamics of Environmental Processes
local.contributor.affiliationCozzi, G., Institute for the Dynamics of Environmental Processes
local.contributor.affiliationDelmonte, B., University of Milan-Bicocca
local.contributor.affiliationFischer, H. , Alfred Wegener Institute for Polar and Marine Research
local.description.embargo2037-12-31
local.bibliographicCitation.startpage135
local.bibliographicCitation.lastpage147
local.identifier.doi10.5194/cp-8-135-2012
local.identifier.absseo960310 - Global Effects of Climate Change and Variability (excl. Australia, New Zealand, Antarctica and the South Pacific) (excl. Social Impacts)
dc.date.updated2016-02-24T10:32:22Z
local.identifier.scopusID2-s2.0-84856381117
local.identifier.thomsonID000300878100009
CollectionsANU Research Publications

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