An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands
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. T...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-10-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1259262/full |
| _version_ | 1797648560757407744 |
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| author | Elisa Klein Emma Hadré Sebastian Krastel Morelia Urlaub |
| author_facet | Elisa Klein Emma Hadré Sebastian Krastel Morelia Urlaub |
| author_sort | Elisa Klein |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-11T15:33:54Z |
| format | Article |
| id | doaj.art-33c0707229c246c995a64c372d6cd115 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-03-11T15:33:54Z |
| publishDate | 2023-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-33c0707229c246c995a64c372d6cd1152023-10-26T23:49:33ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-10-011010.3389/fmars.2023.12592621259262An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islandsElisa Klein0Emma Hadré1Sebastian Krastel2Morelia Urlaub3Dynamic of the Ocean Floor, GEOMAR - Helmholtz Centre for Ocean Research Kiel, Kiel, GermanyMarine Geophysics and Hydroacoustics, Institute for Geosciences, Kiel University, Kiel, GermanyMarine Geophysics and Hydroacoustics, Institute for Geosciences, Kiel University, Kiel, GermanyDynamic of the Ocean Floor, GEOMAR - Helmholtz Centre for Ocean Research Kiel, Kiel, GermanyDigital 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.https://www.frontiersin.org/articles/10.3389/fmars.2023.1259262/fullvolcanic islandslateral collapsetsunamimultiresolutiongeomorphometry |
| spellingShingle | Elisa Klein Emma Hadré Sebastian Krastel Morelia Urlaub An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands Frontiers in Marine Science volcanic islands lateral collapse tsunami multiresolution geomorphometry |
| title | An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands |
| title_full | An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands |
| title_fullStr | An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands |
| title_full_unstemmed | An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands |
| title_short | An evaluation of the General Bathymetric Chart of the Ocean in shoreline-crossing geomorphometric investigations of volcanic islands |
| title_sort | evaluation of the general bathymetric chart of the ocean in shoreline crossing geomorphometric investigations of volcanic islands |
| topic | volcanic islands lateral collapse tsunami multiresolution geomorphometry |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1259262/full |
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