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    Glaciogenic Periglacial Landform in the Making : Geomorphological Evolution of a Rockfall on a Small Glacier in the Horlachtal, Stubai Alps, Austria

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    Fleischer, Fabian ; Haas, Florian ; Altmann, Moritz ; Rom, Jakob ; Ressl, Camillo ; Becht, Michael:
    Glaciogenic Periglacial Landform in the Making : Geomorphological Evolution of a Rockfall on a Small Glacier in the Horlachtal, Stubai Alps, Austria.
    In: Remote sensing. 15 (2023) 6: 1472. - 17 S.
    ISSN 2072-4292

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    Verfügbar unter folgender Lizenz: Creative Commons: Attribution 4.0 International (CC BY 4.0) Creative Commons: Namensnennung (CC BY 4.0) .
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    Volltext Link zum Volltext (externe URL):
    https://doi.org/10.3390/rs15061472

    Kurzfassung/Abstract

    Deglaciation in high mountain areas signifies the transition from glacial to periglacial conditioned landscapes. Due to the reduced melt rate of debris-covered glacier ice, these areas of the glacier may persist long after the surrounding glacier has melted, resulting in the formation of distinct post-glacial landforms. In this study, we examine the geomorphological evolution and potential future development of a 19,267 m3 ± 204 m3 rockfall from the permafrost-affected headwall on the low-elevated Zwieselbachferner in the Horlachtal, Stubai Alps, Austria. The analysis uses multi-epochal remote sensing data, including photogrammetrically and airborne laser scanning-derived digital elevation models, orthophotos, and satellite data, covering a period from the initial rockfall in 2003/2004 to 2022. The data reveals that the rockfall event resulted in the formation of a supraglacial debris layer of varying thickness, spanning an area of 15,920 m2. Subsequently, 13 further rockfalls ranging from 67 m3 ± 6 m3 to 4250 m3 ± 121 m3 were detected. The mean ice thickness of the debris-covered area only slightly decreased between 2006 and 2022, in contrast to the surrounding glacier, whose thickness and length have strongly decreased. This results in the formation of a steep front and flanks that become increasingly covered by debris redistribution. The study suggests that the glacier ice covered by rockfall-derived debris will remain as a periglacial landform of glacial origin after the complete melting of the surrounding glacier.

    Forschungsprojekte

    SEHAG subproject 3 - Spatial and temporal changes in the geomorphic process dynamics on slopes in the Central Alps since the Little Ice Age

    Weitere Angaben

    Publikationsform:Artikel
    Schlagwörter:alpine deglaciation; demise of a small glacier; supraglacial debris; post-glacial landscape evolution
    Sprache des Eintrags:Englisch
    Institutionen der Universität:Mathematisch-Geographische Fakultät > Geographie > Lehrstuhl für Physische Geographie
    DOI / URN / ID:10.3390/rs15061472
    Open Access: Freie Zugänglichkeit des Volltexts?:Ja
    Peer-Review-Journal:Ja
    Verlag:MDPI
    Die Zeitschrift ist nachgewiesen in:
    Titel an der KU entstanden:Ja
    KU.edoc-ID:31726
    Eingestellt am: 08. Mär 2023 10:45
    Letzte Änderung: 31. Mai 2023 11:06
    URL zu dieser Anzeige: https://edoc.ku.de/id/eprint/31726/
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