January 1, 2004 Journal article Open Access

Barbara Stenni; Stefano Polesello; Marina Camusso; O. Flora; Rossana Raffi

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  "@context": "https://schema.org/", 
  "@id": "https://doi.org/10.3189/172756404781814195", 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "name": "Barbara Stenni"
    }, 
    {
      "@type": "Person", 
      "name": "Stefano Polesello"
    }, 
    {
      "@type": "Person", 
      "name": "Marina Camusso"
    }, 
    {
      "@type": "Person", 
      "name": "O. Flora"
    }, 
    {
      "@type": "Person", 
      "name": "Rossana Raffi"
    }
  ], 
  "datePublished": "2004-01-01", 
  "description": "AbstractDuring the 16th Italian Antarctic Expedition (2000/01) a geomorphological survey of permafrost-related polygons was carried out in the Mesa Range area, upper Rennick Glacier. The investigated site is located in the uppermost reaches of Pain Mesa, which forms the northern sector of the Mesa Range. An ice wedge was found in a volcanic regolith at about 2200ma.s.l. This altitude is below a well-defined erosional trimline, located at about 2380ma.s.l. in this sector of Pain Mesa. The ice was sampled by inserting an ice screw, with an internal diameter of 14 mm, into the ice wedge in vertical sequences. Oriented block samples for thin sections were taken. A co-isotopic study was performed, measuring both oxygen (\u03b418O) and hydrogen (\u03b4D) isotope compositions. Tritium activity was measured, and major cations and anions were determined. The \u03b418O and \u03b4D obtained showed a strong divergence from the snowfalls expected to occur at this elevation, with extremely negative d excess values. Sublimation processes were taken into account to define the origin of the ice forming the wedge. The tritium data obtained suggest that the growth process of the ice wedge might still be active today.", 
  "headline": "Growth processes of an inland Antarctic ice wedge, Mesa Range, northern Victoria Land", 
  "identifier": "https://doi.org/10.3189/172756404781814195", 
  "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", 
  "inLanguage": {
    "@type": "Language", 
    "alternateName": "eng", 
    "name": "English"
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  "keywords": [
    "NEANIAS Atmospheric Research Community", 
    "Earth-Surface Processes"
  ], 
  "license": "", 
  "name": "Growth processes of an inland Antarctic ice wedge, Mesa Range, northern Victoria Land", 
  "url": "https://www.openaccessrepository.it/record/121949"
}