January 1, 1999 Journal article Open Access

Giovanni Piccardi; Roberto Udisti; Gabriele Capodaglio; Rita Traversi; Carlo Barbante; S. Vermigli; Emiliano Castellano

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Giovanni Piccardi</dc:creator>
  <dc:creator>Roberto Udisti</dc:creator>
  <dc:creator>Gabriele Capodaglio</dc:creator>
  <dc:creator>Rita Traversi</dc:creator>
  <dc:creator>Carlo Barbante</dc:creator>
  <dc:creator>S. Vermigli</dc:creator>
  <dc:creator>Emiliano Castellano</dc:creator>
  <dc:date>1999-01-01</dc:date>
  <dc:description>AbstractA dark layer (∼1 cm thick, 93.41 m deep) was identified in an ice core (116 m deep, covering the period -1350-1995) drilled at Styx Glacier plateau, northern Victoria Land, Antarctica. The ice-core section was dated around AD 1500 ± 20 by a firn-densification model. A chemical characterisation was performed on ten subsamples (resolution 3 cm) located around the dark layer by ion chromatography. The concentration/depth profiles of anions (Cl-, Br-, NC3-, H2PO4-, SO42-), cations (Na+, NH4+, K+, Mg*+, Ga2^) and some organic anions (acetate, formate, propionate and methanesulphonate (MSA)) indicate very high concentration peaks for all the components. However, non-sea-salt sulphate (nssSo/-) and F- show the greatest increase with respect to background values (370 and 860 times, respectively). A crustal contribution is attributed to Ga2+ and MSA. The profiles of gas-phase emitted substances (HF, HBr, HNOs and carboxylic acid) suggest gas emission just before the volcanic eruption. Chloride depletion is evident in the dark layer with respect to Na+/Cl- sea-water ratio. At present, it is not possible to attribute an unambiguous source to the volcanic event, but several pieces of evidence lead us to believe that this may be a time-limited local event.</dc:description>
  <dc:identifier>https://www.openaccessrepository.it/record/121983</dc:identifier>
  <dc:identifier>10.3189/172756499781821265</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>url:https://www.openaccessrepository.it/communities/itmirror</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:subject>EUTOPIA Alliance</dc:subject>
  <dc:subject>NEANIAS Atmospheric Research Community</dc:subject>
  <dc:subject>Earth-Surface Processes</dc:subject>
  <dc:title>Chemical characterisation of a volcanic event (about AD 1500) at Styx Glacier plateau, northern Victoria Land, Antarctica</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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