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            <funder>This research is part of the "PAraglacial Rock-slope failures dating in Iceland" programme(2022-2026) funded by the French Polar Institute Paul-Emile Victor (IPEV).</funder>
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                <term xml:lang="en">Rock-slope failure</term>
                <term xml:lang="en">Deglaciation</term>
                <term xml:lang="en">Iceland</term>
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              <p>The fjords of eastern Iceland display many landslide landforms. These phenomena, visible by remote observation of satellite images and Digital Elevation Models (DEM), were inventoried then measured and analysed. A total of 290 landslides were recorded in a spreadsheet database and in a Geographic Information System (GIS). For each landslide, location, morphometry (length, width, surface area, thickness, estimated volume, etc.) data, as well as potential control variables, particularly geological (lithology, dip) or explanatory (orientation, age of deglaciation of the slope aff ected by the landslide) were recorded. These variables and their distribution were studied by spatial and statistical analysis. This study highlights a higher density of landslides in the northern part of the study area, which could be explained by past ice sheet current directions, which would have reinforced the pressure exerted on the slopes leading to the postglacial decompression phenomenon. The over-representation of west- and south-facing landslides leads to the hypothesis of climatic control: the sunnier slopes underwent more rapid deglaciation, which favoured the instability of the slopes. The data collected also suggest that the lithology (Tertiary basalts) is a control variable and the period during which the landslide area is deglaciated an explanatory variable for landslide initiation.The landslides observed are thus part of a paraglacial dynamic of slope instability after their deglaciation.</p>
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              <p>Les fjords de l’est de l’Islande concentrent de nombreux glissements de terrain. Ces phénomènes visibles par observation à distance d’images satellites et d’un Modèle Numérique de Terrain (MNT) ont été inventoriés dans cette étude, puis mesurés et analysés. Au total, 290 glissements de terrain ont été recensés au sein d’une base de données sous forme de tableur et dans un Système d’Informations Géographiques (SIG). Pour chaque glissement de terrain ont été relevées sa localisation, sa morphométrie (longueur, largeur, superficie, épaisseur, volume estimé, etc.), ainsi que de potentielles variables de contrôle notamment géologiques (lithologie, pendage), ou explicatives (orientation, âge de la déglaciation du versant affecté par le glissement de terrain). Ces variables et leur répartition ont été étudiées par analyse spatiale etstatistique. Cette étude met en avant une plus forte densité de glissements de terrain dans le nord de la zone étudiée, qui pourrait s’expliquer par les directions d’écoulement de la calotte glaciaire passée, qui auraient renforcé la pression exercée sur les versants entraînant le phénomène de décompression postglaciaire. Un autre constat est une surreprésentation deglissements orientés vers l’ouest et le sud, amenant l’hypothèse d’un contrôle climatique : les versants davantage ensoleillés auraient subi une déglaciation plus rapide favorisant l’instabilité des versants. Les données recueillies suggèrent également que la lithologie (basaltes tertiaires) est une variable de contrôle et que la période pendant laquelle la zone de glissement de terrain est déglacée est une variable explicative de l’initiation du glissement de terrain. Les glissements de terrain observés s’inscriraient ainsi dans une dynamique paraglaciaire d’instabilité des versants après leur déglaciation.</p>
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            <address>
              <country key="FR"/>
            </address>
          </desc>
        </org>
      </listOrg>
    </back>
  </text>
</TEI>