Spatial and temporal distribution of environmental markers from coastal to plateau areas in Antarctica by firn core chemical analysis

Rita Traversi, Silvia Becagli, Emiliano Castellano, Ombretta Largiuni, Alessio Migliori, Mirko Severi, Massimo Frezzotti, Roberto Udisti

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27 Citations (Scopus)

Abstract

The chemical analysis of shallow firn cores sampled in coastal and plateau areas in Northern Victoria Land and along a transect from Talos Dome to Dome C (East Antarctica, Pacific Ocean sector) allowed a global view of spatial and temporal changes in chemical composition of snow depositions over the last 100 years. Variations in concentration of primary (sea spray) and secondary (biogenic emission, atmospheric inputs) source markers were observed and discussed as a function of distance from the sea and altitude. In the stations characterized by relatively high snow accumulation rates, the sub-sampling resolution was sufficient to obtain a stratigraphic dating by using the periodical variations of seasonal markers. In these stations, a subdivision in "summer" and "winter" samples was carried out in order to study the seasonal changes of the contributions of the measured compounds to the snow composition as elevation and distance from the sea increase. Some evidence of post-depositional effects which are able to change the original deposition of chloride and nitrate, was observed at stations with low accumulation rates. The reliability of the depth/concentration profile of these substances for reconstructing past deposition was also discussed.
Original languageEnglish
Pages (from-to)457 - 470
Number of pages14
JournalInternational Journal of Environmental Analytical Chemistry
Volume84
Issue number6-7
DOIs
Publication statusPublished - 15 May 2004
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal
  • Soil Science
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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