Reconstructing past sea level through notches: Orosei Gulf |
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| Nikos Georgiou, Paolo Stocchi, Alessio Rovere, Elisa Casella |
- Abstract:
- A tidal notch with a maximum height of 10.5 m and almost 60 km of lateral extent was carved during the Last Interglacial (127-116 ka BP) along the West-Sardinian coast, in the Orosei Gulf. We present the results of the detailed mapping of the Orosei tidal notch using the Structure from Motion Multi-View Stereo (SfM-MVS) reconstruction method. Although its geometry is laterally constant, the notch depth differs due to local factors. Results of SfM-MVS reconstructions, together with local parameters, were used as input in a geometric model that simulates the notch shape based on randomly sampled relative sea-level curves. The modeled profiles best matching with the real shape of the notch are those characterized by a bimodal geometry. Extracting information from this rocky imprint is considered crucial to better understand past changes in sea level, which are in turn significant to better gauge sea-level variations in warmer climate conditions.
- Download:
- IMEKO-TC19-MetroSea-2020-35.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC19
- Event name:
- MetroSea 2020
- Title:
TC19 International Workshop on Metrology for the Sea
- Place:
- Naples, ITALY
- Time:
- 05 October 2020 - 07 October 2020