Show simple item record

dc.contributor.authorVallelonga, Paul
dc.contributor.authorGabrielli, P.
dc.contributor.authorRosman, Kevin
dc.contributor.authorBarbante, C.
dc.contributor.authorBoutron, C.
dc.identifier.citationVallelonga, P. and Gabrielli, P. and Rosman, K. J. R. and Barbante, C. and Boutron, C. F. 2005. A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core. Geophysical Research Letters. 32 (1).

[1] Pb isotopic compositions and Pb and Ba concentrations are reported in EPICA Dome C ice core samples dating to 220 kyr BP, indicating that Pb isotopic compositions in Antarctic ice vary with changing climate. 206Pb/207Pb ratios decrease during glacial periods, with the lowest values occurring during colder climatic periods (stages 2, 4 and 6) and the Holocene. Low Pb concentrations (<1 pg/g) were found during the Holocene and the last interglacial (climate stage 5.5) while higher Pb concentrations (>10 pg/g) were found during cold climatic periods. Ba, a proxy for mineral dust, was used to determine that dust usually accounts for ~ 70% of Pb in Dome C ice, while the remaining ~ 30% was attributed to volcanic emissions. Pb isotopic compositions at Dome C differ from those reported in pre-industrial ice from other Antarctic locations, due to greater proportions of dust Pb at Dome C.

dc.publisherAmerican Geophysical Union AGU
dc.titleA 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core
dc.typeJournal Article
dcterms.source.titleGeophysical Research Letters

Accepted for publication in Geophysical Research Letters. Copyright © 2005. American Geophysical Union. Further reproduction or electronic distribution is not permitted.

curtin.departmentDepartment of Imaging and Applied Physics
curtin.accessStatusOpen access
curtin.facultyDepartment of Medical Imaging and Applied Physics
curtin.facultySchool of Science
curtin.facultyFaculty of Science and Engineering

Files in this item


This item appears in the following Collection(s)

Show simple item record