Abstract
Advance in the visualization of the bathymetric and geological data from charted to digital maps and models opened the possibility to analyse data within Geographic Information System (GIS) functionalities. In this paper, bathymetric and geological properties of the Adriatic Sea were analysed using the General Bathymetric Chart of the Ocean (GEBCO) 2020 digital bathymetric model (DBM) and data from the European Marine Observation and Data Network (EMODnet). The bathymetric analysis includes depth statistics, area and volume calculation, hypsometry, and analysis of the heterogeneity of bathymetric data from the GEBCO 2020 DBM within the limits of the Adriatic defined by the International Hydrographic Organization (IHO) and 3 sub-basins delineated according to the bathymetry. The geological analysis includes seabed substrate map from EMODnet data and kilometre-scale seabed variability in the Adriatic. The GEBCO 2020 DBM shows that the Adriatic Sea is a shallow sea with a mean depth of -253 metres and over 50% of area shallower than 100 metres. The area of the Adriatic Sea is 138 516 km2 with a total volume of 35 521 km3. Patterns describing morphological variability coincide with the heterogeneity of the underlying source data of the GEBCO 2020 digital bathymetry model and major structures in the Adriatic Sea.
Highlights
Topography of the seabed is shaped by past and present geological processes
The bathymetric analysis includes depth statistics, area and volume calculation, hypsometry, and analysis of the heterogeneity of bathymetric data from the General Bathymetric Chart of the Ocean (GEBCO) 2020 digital bathymetric model (DBM) within the limits of the Adriatic defined by the International Hydrographic Organization (IHO) and 3 sub-basins delineated according to the bathymetry
The GEBCO 2020 digital bathymetric model (DBM) has been used as a bathymetric source and all pixels with values smaller than zero that fall within the defined boundaries have been included in the Geographic Information System (GIS) based analyses
Summary
Topography of the seabed is shaped by past and present geological processes. A digital bathymetric model (DBM) is a digital terrain model that represents the topography of the seabed (Li et al, 2004). Modern bathymetric methods provide a complete cover of the seabed with submeter resolution, but such a highresolution bathymetric model of the Adriatic Sea is not available. Apart from digital navigational charts and scientific or industrial research on a local scale, a digital bathymetric model based on acoustic bathymetric methods has been generated only for the Italian part of the Adriatic (Trincardi et al, 2013). Advances in the visualization of seabed topography from charted maps to digital bathymetric. A General Bathymetric Chart of the Ocean (GEBCO) 2020 digital bathymetric model and IHO limits of the Adriatic Sea (IHO, 1953) were used to calculate statistics of depth in the Adriatic: mean, standard deviation, median, maximum as well as area and volume.
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