A 220 ky record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core. (Articolo in rivista)

Type
Label
  • A 220 ky record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core. (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Alternative label
  • Vallelonga P., Gabrielli P., Rosman K.J.R., Barbante C., Boutron C.F. (2005)
    A 220 ky record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core.
    in Geophysical research letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vallelonga P., Gabrielli P., Rosman K.J.R., Barbante C., Boutron C.F. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Il lavoro si propone di ricostruire le sorgenti e le origini del piombo con particolare riferimento all’apporto di polveri crostali ed aerosol vulcanici. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 32 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • L’articolo illustra l’andamento delle concentrazioni del piombo ed i suoi isotopi nella carota di ghiaccio antartica denominata EPICA durante i due ultimi cicli climatici. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • A 220 ky record of Pb isotopes at Dome C Antarctica from analyses of the EPICA ice core. (literal)
Abstract
  • 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. (literal)
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