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  • Frontiers  (2)
  • Köln : Universität zu Köln  (1)
  • 2020-2024  (3)
  • 2020-2023
  • 1995-1999
  • 1
    Online Resource
    Online Resource
    PLOT: Paläolimnologischer Transekt - Synthese : Abschlussbericht : Nov. 2019-Dez. 2021 : Teilprojekte: TP1 "Koordination" und "Paläoklimatologie" (Universität zu Köln); TP2 "Seismik" (Universität zu Kiel); TP3 "Isotope" und "Modellierung" (AWI Potsdam und Bremerhaven) (2022)
    Köln : Universität zu Köln
    Details Availability
    Keywords: Forschungsbericht ; Eurasien Nord ; Ladogasee ; Holozän ; Paläoklima
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (63 Seiten, 24,45 MB) , Illustrationen, Diagramme
    URL: https://doi.org/10.2314/KXP:1854173960
    URL: https://edocs.tib.eu/files/e01fb23/1854173960.pdf
    DOI: 10.2314/KXP:1854173960
    Language: German , English
    Note: Förderkennzeichen BMBF 03F0830A-C , Verbundnummer 01197576 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Sprache der Zusammenfassungen: Deutsch, Englisch
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  • 2
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    The Submarine Boundaries of Mount Etna’s Unstable Southeastern Flank (2022)
    Frontiers
    Details
    Publication Date: 2024-02-23
    Description: Coastal and ocean island volcanoes are renowned for having unstable flanks. This can lead to flank deformation on a variety of temporal and spatial scales ranging from slow creep to catastrophic sector collapse. A large section of these unstable flanks is often below sea level, where information on the volcano-tectonic structure and ground deformation is limited. Consequently, kinematic models that attempt to explain measured ground deformation onshore associated with flank instability are poorly constrained in the offshore area. Here, we attempt to determine the locations and the morpho-tectonic structures of the boundaries of the submerged unstable southeastern flank of Mount Etna (Italy). The integration of new marine data (bathymetry, microbathymetry, offshore seismicity, reflection seismic lines) and published marine data (bathymetry, seafloor geodesy, reflection seismic lines) allows identifying the lineament north of Catania Canyon as the southern lateral boundary with a high level of confidence. The northern and the distal (seaward) boundaries are less clear because no microbathymetric or seafloor geodetic data are available. Hypotheses for their locations are presented. Geophysical imaging suggests that the offshore Timpe Fault System is a shallow second-order structure that likely results from extensional deformation within the moving flank. Evidence for active uplift and compression upslope of the amphitheater-shaped depression from seismic data along with subsidence of the onshore Giarre Wedge block observed in ground deformation data leads us to propose that this block is a rotational slump, which moves on top of the large-scale instability. The new shoreline-crossing structural assessment may now inform and improve kinematic models.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands (2023)
    Frontiers
    Details
    Publication Date: 2024-03-20
    Description: Digital elevation models (DEMs) are crucial in natural hazard assessments, as they often present the only comprehensive information. While satellites deliver remote sensing information of the land surface of up to 2m resolution, only 25% of the seafloor is mapped with a minimum resolution of 400m. The acquisition of high-resolution bathymetry requires hydroacoustic surveys by research vessels or autonomous vehicles, which is time-consuming and expensive. Predicted bathymetry from satellite altimetry, on the other hand, is widely available but has a significantly lower spatial resolution and high uncertainties in elevation, especially in shallow waters. The research on volcanic islands as a source of both volcanic as well as marine hazards such as tsunamis, is greatly limited by the lack of high-resolution bathymetry. Here we compare 24 geomorphometric parameters of 47 volcanic islands derived from a) the comprehensive bathymetric data of the General Bathymetric Chart of the Ocean (GEBCO) and b) high-resolution (〈 250m), ship-based bathymetry. Out of 24 parameters tested, 20 show 〈 ± 2.5% median deviation, and quartiles 〈 ± 10%. Parameters describing the size of a volcanic island are the most robust and slope parameters show the greatest deviations. With this benchmark, we will be able to increase geomorphometric investigations to volcanic islands where little or no high-resolution bathymetry data is available.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: archive
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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