Submarine volcanoes of the Kolumbo volcanic zone NE of Santorini Caldera, Greece

Nomikou, Paraskevi; Carey, Steven; Papanikolaou, D.; Bell, Katy Croff; Sakellariou, D.; Alexandri, M.; Bejelou, Konstantina

doi:10.1016/j.gloplacha.2012.01.001

Cited by 115 publications

(115 citation statements)

References 18 publications

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“…The spatial data of "submarine structures made by leaking gases" (Habitat Type 1180 sensu 92/43/EEC) was acquired from past geological surveys focusing on well-known underwater hydrothermal vent sites along the Aegean volcanic arc (Dando et al, 2000;Sigurdsson et al, 2006;Nomikou et al, 2012Nomikou et al, , 2013Kilias et al, 2013). These structures are characterized by the presence of chimneys, cones, bubbling reefs, and other conspicuous submarine structures (Baggini et al, 2014(Baggini et al, , 2015.…”

Section: Submarine Structures Made By Leaking Gasesmentioning

confidence: 99%

Assembling Ecological Pieces to Reconstruct the Conservation Puzzle of the Aegean Sea

et al. 2017

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The effective conservation of marine biodiversity through an integrated ecosystem-based management approach requires a sound knowledge of the spatial distribution of habitats and species. Although costly in terms of time and resources, acquiring such information is essential for the development of rigorous management plans and the meaningful prioritization of conservation actions. Located in the northeastern part of the Mediterranean, the Aegean Sea represents a stronghold for marine biodiversity. However, conservation efforts are hampered by the apparent lack of spatial information regarding marine habitats and species. This work is the first to address this knowledge gap by assembling, updating, and mapping information on the distribution of key ecological components. A range of data sources and methodological approaches was utilized to compile and complement the available data on 68 ecological features of conservation interest (58 animal species, six habitat categories, and four other vulnerable ecological features). A standardized data evaluation procedure was applied, based on five semi-quantitative data quality indicators in the form of a pedigree matrix. This approach assessed the sufficiency of the datasets and allowed the identification of the main sources of uncertainty, highlighting aspects that require further investigation. The overall dataset was found to be sufficient in terms of reliability and spatiotemporal relevance. However, it lacked in completeness, showing that there are still large areas of the Aegean that remain understudied, while further research is needed to elucidate the distribution patterns and conservation status of several ecological features; especially the less charismatic Sini et al.Aegean Sea Conservation Puzzle ones and those found in waters deeper than 40 m. Moreover, existing conservation measures appear to be inadequate to safeguard biodiversity. Only 2.3% of the study area corresponds to designated areas for conservation, while 41 of the ecological features are underrepresented in these areas. Considering the high geomorphological complexity and transnational character of the Aegean Sea, this study does not offer a complete account of the multifaceted diversity of this ecoregion. Instead, it represents a significant starting point and a solid basis for the development of systematic conservation plans that will allow the effective protection of biodiversity within an adaptive management framework.

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Section: Submarine Structures Made By Leaking Gasesmentioning

confidence: 99%

Assembling Ecological Pieces to Reconstruct the Conservation Puzzle of the Aegean Sea

et al. 2017

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“…The submarine Kolumbo volcanic cone, that lies about 7 km north-east from Santorini island, has a diameter of around 3 km and its crater width ranges from 1500 m to 1700 m (Nomikou et al, 2012a). To investigate the consequences of an eventual future eruption of Kolumbo, we fix the position of the potential explosion corresponding to actual Kolumbo crater centre and systematically test different initial explosion powers.…”

Section: Simulations Of Tsunami Generated By Future Underwater Explosmentioning

confidence: 99%

“…2), which is located 7 km off the north-east coast of Santorini island (Aegean Sea, Greece). Kolumbo has a diameter of 3 km, with a summit crater 1.7 km across and 500 m deep (Nomikou et al, 2012a). The last recorded volcanic activity at Kolumbo took place in 1650 AD and produced ash plumes that perforated the water surface, ash falls and tsunami on the coasts of the neighboring islands, and around 70 fatalities by volcanic gases in Santorini (Fouqué, 1879;Dominey-Howes et al, 2000;Nomikou et al, 2012b).…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations of tsunamis generated by underwater volcanic explosions at Karymskoye lake (Kamchatka, Russia) and Kolumbo volcano (Aegean Sea, Greece)

Ulvrová

Paris

Kelfoun

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. Increasing human activities along the coasts of the world provoke the necessity to assess tsunami hazard from different sources (earthquakes, landslides, volcanic activity). In this paper, we simulate tsunamis generated by underwater volcanic explosions from (1) a submerged vent in a shallow water lake (Karymskoye Lake, Kamchatka), and (2) from Kolumbo submarine volcano (7 km NE of Santorini, Aegean Sea, Greece). The 1996 tsunami in Karymskoye lake is a well-documented example and thus serves as a case study for validating the calculations. The numerical model reproduces realistically the tsunami run-ups measured onshore. Systematic numerical study of tsunamis generated by explosions of the Kolumbo volcano is then conducted for a wide range of energies. Results show that in case of reawakening, the Kolumbo volcano might represent a significant tsunami hazard for the northern, eastern and southern coasts of Santorini, even for small-power explosions.

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“…Studies (Bell et al,2013, Carey et al, 2011Nomikou et al, 2012, Sigurdsson et al, 2006 have used ROV, whose capability reaches 3-4 km depth and deployed from large vessels, to help characterise and map submarine volcanoes or volcanic outcrops within the Hellenic Trench and the developed Aegean Volcanic Arc.…”

Section: Introductionmentioning

confidence: 99%

Exploring Offshore Hydrothermal Venting Using Low-Cost ROV and Photogrammetric Techniques: A Case Study from Milos Island, Greece

Teague¹,

Miles²,

Connor³

et al. 2018

Preprint

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The study utilises two emerging low-cost technologies, low cost Remotely Operated Vehicle (ROV) and underwater photogrammetry techniques (Structure from motion (SfM)) using off the shelf cameras, for 3D reconstruction of shallow hydrothermal vent sites around Paleochori Bay, Milos Island, Greece. Venting fields were Characterised through interactive bathymetry models produced from still images taken from camera onboard ROV flown over areas of interest in double raster pattern. This is the first time the shallow venting fields on Milos have been actively surveyed using the combined approach of ROV and photogrammetry. Areas were successfully surveyed and the bathymetry was reconstructed using SfM photogrammetry with a ~10 cm scale resolution. A diverse range of benthic habitats were surveyed and the resulting topographic models will act as a baseline for an established method, that given with positioning will provide further characterisation of the vent systems and any evolving seafloor morphology.

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Submarine volcanoes of the Kolumbo volcanic zone NE of Santorini Caldera, Greece

Cited by 115 publications

References 18 publications

Assembling Ecological Pieces to Reconstruct the Conservation Puzzle of the Aegean Sea

Assembling Ecological Pieces to Reconstruct the Conservation Puzzle of the Aegean Sea

Numerical simulations of tsunamis generated by underwater volcanic explosions at Karymskoye lake (Kamchatka, Russia) and Kolumbo volcano (Aegean Sea, Greece)

Exploring Offshore Hydrothermal Venting Using Low-Cost ROV and Photogrammetric Techniques: A Case Study from Milos Island, Greece

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