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Mashkoor Malik
Seafloor backscatter data from multibeam echosounders are now widely used in seafloor characterization studies. Accurate and repeatable measurements are essential for advancing the success of these techniques. This paper explores the impact of uncertaint...
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Mark Zimmermann and Megan M. Prescott
We created a new, 100 m horizontal resolution bathymetry raster and used it to define 29 canyons of the eastern Bering Sea (EBS) slope area off of Alaska, USA. To create this bathymetry surface we proofed, edited, and digitized 18 million soundings from ...
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Jinan Guan, Yian Liang, Shujia Wang, Lihua Wan, Shuanshi Fan, Pibo Su, Wei Zhang and Deqing Liang
The stratigraphic-diffusive type of gas hydrate system is formed by microbial methane produced in a shallow slope space when flowing laterally into hydrate stable zones and is worth studying for both energy supply and academic understanding. A deposition...
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Raúl Jiménez-Romero, Luis Miguel Fernández-Salas, Desirée Palomino, Ricardo Félix Sánchez-Leal and Yolanda Vila
The dense and deep water flow that leaves the Mediterranean Sea to the Atlantic flows through the upper and middle slope of the Gulf of Cádiz as a powerful bottom stream that models and interacts with bathymetry. The detailed analysis of underwater image...
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Gemma Aiello, Marina Iorio, Flavia Molisso and Marco Sacchi
Submarine canyons are geomorphologic lineaments engraving the slope/outer shelf of continental margins. These features are often associated with significant geologic hazard when they develop close to densely populated coastal zones. The seafloor of Naple...
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Courtney K. Harris, Jaia Syvitski, H.G. Arango, E.H. Meiburg, Sagy Cohen, C.J. Jenkins, Justin J. Birchler, E.W.H. Hutton, T.A. Kniskern, S. Radhakrishnan and Guillermo Auad
Turbidity currents deliver sediment rapidly from the continental shelf to the slope and beyond; and can be triggered by processes such as shelf resuspension during oceanic storms; mass failure of slope deposits due to sediment- and wave-pressure loadings...
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Daria Ryabchuk, Alexander Sergeev, Alexander Krek, Maria Kapustina, Elena Tkacheva, Vladimir Zhamoida, Leonid Budanov, Alexandr Moskovtsev and Aleksandr Danchenkov
In 2017, a detailed study of the Eastern Gulf of Finland (the Baltic Sea) seafloor was performed to identify and map submerged glacial and postglacial geomorphologic features and collect data pertinent to the understanding of sedimentation in postglacial...
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Mauro Agate, Christina Lombardo, Claudio Lo Iacono, Attilio Sulli, Sabrina Polizzi, Renato Chemello and Paolo Emanuele Orrù
In this paper, the physiography, geomorphological features, and sedimentary bedforms of the offshore Egadi Islands (Italy) have been illustrated and mapped through an integrated analysis of high-resolution bathymetric, seismo-acoustic, and sedimentologic...
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Christine Erbe, David Peel, Joshua N. Smith and Renee P. Schoeman
Underwater sound is modelled and mapped for purposes ranging from localised environmental impact assessments of individual offshore developments to large-scale marine spatial planning. As the area to be modelled increases, so does the computational effor...
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Craig Heatherington, Alistair Grinham, Irene Penesis, Scott Hunter and Remo Cossu
Marine renewable energy is still in its infancy and poses serious challenges due to the harsh marine conditions encountered for wave or tidal installations and the survivability of devices. Geophysical and hydrodynamic initial site surveys need to be abl...
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Stefano Conti, Claudio Argentino, Chiara Fioroni, Aura Cecilia Salocchi and Daniela Fontana
The natural emission of methane-rich fluids from the seafloor, known as cold seepage, is a widespread process at modern continental margins. The studies on present-day cold seepages provide high-resolution datasets regarding the fluid plumbing system, bi...
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Francesco Mascioli, Valerio Piattelli, Francesco Cerrone, Davide Gasprino, Tina Kunde and Enrico Miccadei
The growing interest in monitoring the marine environment has strongly encouraged governmental agencies and research institutes to undertake seabed mapping programs and stimulated scientific interest in innovative mapping methods and tools. In this study...
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Elizabeth A. Pendleton, Edward M. Sweeney and Laura L. Brothers
The U.S. Geological Survey (USGS) and the National Oceanic Atmospheric Administration (NOAA) have collected approximately 5400 km2 of geophysical and hydrographic data on the Atlantic continental shelf between Delaware and Virginia over the past decade a...
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Brandi L. Lenz, Derek E. Sawyer, Benjamin Phrampus, Kathy Davenport and Ashley Long
A series of large blocks from the 44-North Slide, offshore Oregon, impacted the seafloor with sufficient force to induce a broad zone of deformation. In 2017, we acquired a seismic profile from the headwall area to the outer toe of this slide. Previous w...
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Mischa Schönke, Lars Wiesenberg, Inken Schulze, Dennis Wilken, Alexander Darr, Svenja Papenmeier and Peter Feldens
Quantitative acoustic marine habitat mapping needs to consider the impact of macrobenthic organisms on backscatter data. However, the sensitivity of hydroacoustic systems to epibenthic life is poorly constrained. This study explores the impact of a benth...
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Olga Sánchez-Guillamón, Luis Miguel Fernández-Salas, Juan-Tomás Vázquez, Desirée Palomino, Teresa Medialdea, Nieves López-González, Luis Somoza and Ricardo León
Derived digital elevation models (DEMs) are high-resolution acoustic technology that has proven to be a crucial morphometric data source for research into submarine environments. We present a morphometric analysis of forty deep seafloor edifices located ...
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Giovanni Barreca, Marta Corradino, Carmelo Monaco and Fabrizio Pepe
The offshore margin of Mt. Etna has been shaped by Middle Pleistocene to Holocene shortening and extension and, more recently, by gravity-related sliding of the volcanic edifice. These processes have acted contemporaneously although the gravitational com...
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Giovanni Barreca, Marta Corradino, Carmelo Monaco and Fabrizio Pepe
The offshore margin of Mt. Etna has been shaped by Middle Pleistocene to Holocene shortening and extension and, more recently, by gravity-related sliding of the volcanic edifice. These processes have acted contemporaneously although the gravitational com...
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Yuan Yao, Chao Sun and Xionghou Liu
When a hydrophone is deployed under the critical depth in deep ocean, the interference pattern will be complex and variable. The waveguide invariant is no longer constant and is treated as a distribution. The interference pattern is impacted by refracted...
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Silvia N. Bourguignon, Alex C. Bastos, Valéria S. Quaresma, Fernanda V. Vieira, Hudson Pinheiro, Gilberto Menezes Amado-Filho, Rodrigo Leão De Moura and João Batista Teixeira
Shelf morphology and sedimentary regimes are influenced by processes operating at different temporal and spatial scales and are important records of sea level changes and sediment supply and/or carbonate production. The northern continental shelf of Espí...
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