A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core
[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 dur...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
American Geophysical Union AGU
2005
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| Online Access: | http://hdl.handle.net/20.500.11937/22539 |
| _version_ | 1848750898092703744 |
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| author | Vallelonga, Paul Gabrielli, P. Rosman, Kevin Barbante, C. Boutron, C. |
| author_facet | Vallelonga, Paul Gabrielli, P. Rosman, Kevin Barbante, C. Boutron, C. |
| author_sort | Vallelonga, Paul |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | [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. |
| first_indexed | 2025-11-14T07:44:08Z |
| format | Journal Article |
| id | curtin-20.500.11937-22539 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:44:08Z |
| publishDate | 2005 |
| publisher | American Geophysical Union AGU |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-225392017-09-13T16:03:34Z A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core Vallelonga, Paul Gabrielli, P. Rosman, Kevin Barbante, C. Boutron, C. [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. 2005 Journal Article http://hdl.handle.net/20.500.11937/22539 10.1029/2004GL021449 American Geophysical Union AGU fulltext |
| spellingShingle | Vallelonga, Paul Gabrielli, P. Rosman, Kevin Barbante, C. Boutron, C. A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core |
| title | A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core |
| title_full | A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core |
| title_fullStr | A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core |
| title_full_unstemmed | A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core |
| title_short | A 220 kyr record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core |
| title_sort | 220 kyr record of pb isotopes at dome c antarctica from analyses of the epica ice core |
| url | http://hdl.handle.net/20.500.11937/22539 |