January 1, 2000 Journal article Open Access

Frédérique Rémy; C. Bianchi; Ignazio E. Tabacco; Laurent Testut

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  <identifier identifierType="URL">https://www.openaccessrepository.it/record/121927</identifier>
  <creators>
    <creator>
      <creatorName>Frédérique Rémy</creatorName>
    </creator>
    <creator>
      <creatorName>C. Bianchi</creatorName>
    </creator>
    <creator>
      <creatorName>Ignazio E. Tabacco</creatorName>
    </creator>
    <creator>
      <creatorName>Laurent Testut</creatorName>
    </creator>
  </creators>
  <titles>
    <title>Influence of geometrical boundary conditions on the estimation of rheological parameters</title>
  </titles>
  <publisher>INFN Open Access Repository</publisher>
  <publicationYear>2000</publicationYear>
  <subjects>
    <subject>NEANIAS Atmospheric Research Community</subject>
    <subject>Earth-Surface Processes</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2000-01-01</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://www.openaccessrepository.it/record/121927</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.3189/172756400781820877</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://www.openaccessrepository.it/communities/itmirror</relatedIdentifier>
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  <rightsList>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
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  <descriptions>
    <description descriptionType="Abstract">AbstractImproved knowledge of geometrical boundary conditions, such as bedrock geometry and surface topography, can contribute significantly to glaciological studies including ice-sheet-flow modelling. Precise thickness and altimetric data allow an estimation of ice-flow direction, the balance velocity and the basal shear stress. These parameters are calculated along a 1160 km profile in East Antarctica using a relationship between shear stress, basal temperature, the Glen flow exponent and a parameter related to strain rate. Strong variations of the flow-law parameters and basal conditions are found to play a major role in the ice-flow pattern. Sliding, anisotropy and longitudinal stress strongly perturb the validity of the law, but their signature can be identified.</description>
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