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

TitleSpatial and temporal distribution of environmental markers from coastal to plateau areas in Antarctica by firn core chemical analysis
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2004
AuthorsTraversi, R., Becagli S., Castellano E., Largiuni O., Migliori A., Severi M., Frezzotti M, and Udisti R.
JournalInternational Journal of Environmental Analytical Chemistry
Volume84
Pagination457-470
ISSN03067319
KeywordsChemical analysis, Coastal zones, Particulate emissions, Seasonal changes, Seasonal markers, Seawater, Sedimentation, Snow, Victoria
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.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-2642545870&doi=10.1080%2f03067310310001640393&partnerID=40&md5=6d6eb6a02f8b102e26d2536ec7c1b2fc
DOI10.1080/03067310310001640393
Citation KeyTraversi2004457