Isotopic composition of snow samples from Northern Victoria Land, (Antarctica) and correlations with the geographical factors

Authors

  • Michela Dini Dipartimento di Scienze Ambientali, Geologiche e Marine, Università di Trieste, Trieste, Italia Author
  • Antonio Longinelli Dipartimento di Scienze Ambientali, Geologiche e Marine, Università di Trieste, Trieste, Italia Author
  • Giuseppe Orombelli Dipartimento di Scienze dell’Ambiente e del Territorio, Università di Milano, Milano, Italia Author
  • Claudio Smiraglia Dipartimento di Scienze della Terra, Università di Milano, Milano, ltalia Author

Keywords:

Snow isotopic composition, Altitude effect, Victoria Land, Antarctica

Abstract

During the 1989-90 and 1994.95 Italian expeditions to Antarctica, two sets of fresh surface snow samples were collected in order to analyse their isotope composition and correlation with geographical factors, such as elevation and distance from the coast. A linear relationship between δ18O and δD was found yielding a high correlation coefficient. Mean vertical isotopic gradients of -0.6%/100m and -0.5%/100m were obtained for δ18O from the two different sets, whereas the δD/elevation gradients were 4.7%/100m and -3.5%/100m, respectively. The correlation coefficients between isotopic composition of snowfall and elevation were higher (R2 from 0.42 to 0.81) than those between isotopic composition and distance from the coast. The correlation between deuterium excess and distance from the coast was very weak with higher values moving inland, probably owing to the rather complicated morphology of the area.

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Published

2024-07-02

Issue

Section

Proceedings of the National Meeting on Antarctic Research - Padova, 11-12 June 1996

How to Cite

Dini, M., Longinelli, A., Orombelli, G., & Smiraglia, C. (2024). Isotopic composition of snow samples from Northern Victoria Land, (Antarctica) and correlations with the geographical factors. Geografia Fisica E Dinamica Quaternaria, 20(2), 257-261. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/539

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