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70 years of northern Victoria Land (Antarctica) accumulation rate

  • V. Maggi (a1), G. Orombelli (a1), Β. Stenni (a2), O. Flora (a2), R. Udisti (a3), S. Becagli (a3), R. Traversi (a3), S. Vermigli (a3) and J.-R. Petit (a4)...

Abstract

Measurements of oxygen isotope ratio , major anions and cations, insoluble dust and tritium were performed every 4-6 cm along the Hercules Névé (northern Victoria Land, Antarctica) 22 m firn core. Concentration/depth profiles for H2O2, methane sulphonic acid and non-sea-salt sulphate (nssSO4 2-) were used to obtain a dating for the core by a multiparametric method involving a normalisation procedure and a linear combination of original profiles. This dating was compared with the and dust records to obtain a reliable identification of successive annual snow layers. The time-scale obtained from the seasonally varying signals was confirmed by an absolute date obtained from the 1965 thermonuclear atmospheric bomb test tritium peak. Around 70 years (1926-94) of annual accumulation rate data were obtained from the core. variations recorded along the core may be ascribed to seasonal variations of this parameter related to temperature variations.

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References

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70 years of northern Victoria Land (Antarctica) accumulation rate

  • V. Maggi (a1), G. Orombelli (a1), Β. Stenni (a2), O. Flora (a2), R. Udisti (a3), S. Becagli (a3), R. Traversi (a3), S. Vermigli (a3) and J.-R. Petit (a4)...

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