Tidal notches, long regarded as reliable indicators of mean sea level, have been extensively studied along carbonate coasts in the central Mediterranean Sea. Previous studies revealed a correlation between the genesis of tidal notches and tidal range, lithology, cliff foot depth, and wave energy. In the 2020 Geoswim campaigns at Lampedusa, the southernmost island of the Pelagie archipelago (Italy), and in Gozo Island (Malta), ‘anomalous’ tidal notches were identified. Unlike normal notches observed elsewhere, those in Lampedusa’s southern bays exhibited a particular behaviour—constantly deepening in the inner part of the bays, reaching a maximum depth of approximately 30 cm below sea level and narrowing inwards. Similar phenomena were previously observed near Marseille (France). As confirmed by the literature, all these areas are tectonically stable. Time-lapse images, alongside measurements of morphometric parameters, were collected during the survey. Our hypothesis indicates that a combination of marine factors influenced by local marine conditions driven by the local morphology of the small bays exposed to southern quadrants contribute to the formation of these unique landforms. The latter manifests higher lowering erosion rates slightly below the mean sea level in sheltered areas, challenging conventional notions about tidal notch formation.

Furlani Stefano, Agate Mauro, de Sabata Eleonora, Chemello Renato, Vaccher Valeria, Visconti Giulia, et al. (2024). Dipping Tidal Notch (DTN): Exposed vs. Sheltered Morphometry. GEOSCIENCES, 14(6) [10.3390/geosciences14060157].

Dipping Tidal Notch (DTN): Exposed vs. Sheltered Morphometry

Agate Mauro
;
Chemello Renato;Visconti Giulia;Antonioli Fabrizio
2024-06-01

Abstract

Tidal notches, long regarded as reliable indicators of mean sea level, have been extensively studied along carbonate coasts in the central Mediterranean Sea. Previous studies revealed a correlation between the genesis of tidal notches and tidal range, lithology, cliff foot depth, and wave energy. In the 2020 Geoswim campaigns at Lampedusa, the southernmost island of the Pelagie archipelago (Italy), and in Gozo Island (Malta), ‘anomalous’ tidal notches were identified. Unlike normal notches observed elsewhere, those in Lampedusa’s southern bays exhibited a particular behaviour—constantly deepening in the inner part of the bays, reaching a maximum depth of approximately 30 cm below sea level and narrowing inwards. Similar phenomena were previously observed near Marseille (France). As confirmed by the literature, all these areas are tectonically stable. Time-lapse images, alongside measurements of morphometric parameters, were collected during the survey. Our hypothesis indicates that a combination of marine factors influenced by local marine conditions driven by the local morphology of the small bays exposed to southern quadrants contribute to the formation of these unique landforms. The latter manifests higher lowering erosion rates slightly below the mean sea level in sheltered areas, challenging conventional notions about tidal notch formation.
giu-2024
Settore GEOS-03/A - Geografia fisica e geomorfologia
Furlani Stefano, Agate Mauro, de Sabata Eleonora, Chemello Renato, Vaccher Valeria, Visconti Giulia, et al. (2024). Dipping Tidal Notch (DTN): Exposed vs. Sheltered Morphometry. GEOSCIENCES, 14(6) [10.3390/geosciences14060157].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/670865
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