Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry... (Articolo in rivista)

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  • Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry... (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1177/0959683611409773 (literal)
Alternative label
  • Lorenzini S. [1]; Baneschi I. [2]; Fallick A. E. [3]; Salvatore M. C. [4]; Zanchetta G. [1,2]; Dallai L. [2]; Baroni C. [1,2] (2012)
    Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry...
    in Holocene (Lond. Online); Sage Publications Ltd., London (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lorenzini S. [1]; Baneschi I. [2]; Fallick A. E. [3]; Salvatore M. C. [4]; Zanchetta G. [1,2]; Dallai L. [2]; Baroni C. [1,2] (literal)
Pagina inizio
  • 63 (literal)
Pagina fine
  • 69 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://hol.sagepub.com/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 22 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 1 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [1] Università di Pisa, Italy [2] Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Italy [3] Scottish Universities Environmental Research Centre, UK [4] Università di Roma \"La Sapienza\", Italy (literal)
Titolo
  • Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry... (literal)
Abstract
  • An oxygen isotope record of Adelie penguin (Pygoscelis adeliae) eggshells from Terra Nova Bay (Victoria Land, Antarctica) has been reconstructed in order to provide insights into the palaeoenviroment of this region during the last similar to 8000 years. The delta(18)O values measured in eggshell carbonate show a great variability over the course of the studied period, with maximum values consistently around +27.5%. Adopting a metabolic enrichment relative to water source of similar to+28.5%, eggshell delta(18)O values can be interpreted in terms of marine water uptake by the penguins. The spread in delta(18)O of eggshell carbonate at any given time toward more negative values reflects the existence of a low delta(18)O water end member, most plausibly snow or snowmelt. Samples younger than 2000 years are characterized by a general lack of very negative delta(18)O values. As also attested by other proxies, this shift toward more positive isotopic values is likely to be related both to a decreasing contribution of snow or meltwater in the seawaters and consequently to an absence or paucity on the boundary of the nesting sites of snow or snowfall and freshwater that could be directly eaten or drunk by penguins. (literal)
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