Results 81 to 90 of about 6,191 (207)

Measuring Centimeter-Scale Sand Ripples Using Multibeam Echosounder Backscatter Data from the Brown Bank Area of the Dutch Continental Shelf

Geosciences, 2020
Backscatter data from multibeam echosounders are commonly used to classify seafloor sediment composition. Previously, it was found that the survey azimuth affects backscatter when small organized seafloor structures, such as sand ripples, are present ...
Leo Koop, Karin J. van der Reijden, Sebastiaan Mestdagh, Tom Ysebaert, Laura L. Govers, Han Olff, Peter M. J. Herman, Mirjam Snellen, Dick G. Simons   +8 more
doaj   +1 more source

First AUV and ROV investigation of seismogenic faults in the Alboran Sea (Western Meditarranean) [PDF]

, 2016
In May-June 2015 we carried out the SHAKE cruise on board the RV “Sarmiento de Gamboa” the first in situ investigation using state-of-the-art underwater vehicles, the AUVs “AsterX” and “IdefX” (IFREMER, France) and the ROV “Max Rover” (HCMR, Greece ...
Bartolomé de la Peña, Rafael, Costa, Sergio, Dañobeitia, Juan José, Díez, Susana, Gràcia, Eulàlia, Lo Iacono, Claudio, Perea, Hector, Placaud, Xavier, Rodríguez, Pablo, Smith, Chris, Sánchez, Héctor   +10 more
core  

Sedimentary record of submarine gravity‐flow events in the southern Ryukyu forearc during the last 200 000 years: Archive of mega‐earthquakes and tsunamis

Sedimentology, Volume 72, Issue 7, Page 2323-2360, December 2025.
ABSTRACT Despite high convergence velocity, the southern Ryukyu subduction has relatively low and sparse instrumental seismicity, in contrast with the Yaeyama Islands, hit by huge tsunamis over the last few thousand years. This study explores the potential of deep marine sediments to record past large earthquakes and tsunamis.
Nathalie Babonneau, Gueorgui Ratzov, Charlotte Guerin, Mira Richa, Serge Lallemand, Michel Condomines, Patrick Bachelery, Delphine Bosch, Shu‐Kun Hsu, Chih‐Chieh Su, Ryuichi Shinjo, Andrew Lin, Maria‐Angela Bassetti, Marie Revel, Antonio Cattaneo, the EAGER Scientific Team, M Aizawa, G. Ballas, J.‐H. Chang, Y.‐P. Chang, T.‐T. Chen, Y.‐H. Chen, P. Das, J.‐P. Degeai, J. Déverchère, O. De Raco, N. Gosset, M. Herlédan, S.‐L. Ho, H.‐H. Hsu, Y.‐S. Huang, M. Lanson, C. Letourneau, H.‐S. Lin, L.‐F. Lin, L.‐K. Lin, M. Longo, M. Mérindol, B. Mercier de Lépinay, E. Miramontes, P. Morena, K. Nayak, D. Oregioni, L. Patry, R. K. Pillutla, V. Rigalleau, L. San Pedro, P.‐J. Su, F. Volage, K.‐Y. Wei, B. Whilhelm, N.‐T. Yu, P.‐S. Yu   +52 more
wiley   +1 more source

Whitecaps, Bubbles and Advection: Insights From Concurrent Measurements in the Open Ocean

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract Field measurements of breaking waves and bubble depths were obtained using a stereo video system collocated with a submerged acoustic Doppler current profiler (ADCP) in the central North Sea. We discriminate between two bubble depths that define an active near‐surface layer and a deeper layer.
Maria Bjørnestad, Trygve Halsne, Mika Malila, Alvise Benetazzo, Filippo Bergamasco, Mara Pistellato, Adrian H. Callaghan, Silvio Davison, Joe Peach, Göran Broström, Øyvind Breivik   +10 more
wiley   +1 more source

E/V Nautilus EM302 Multibeam Echosounder System Review [PDF]

, 2014
Introduction The E/V Nautilus undertook leg NA040 to perform a review of the vessel’s Kongsberg EM302 multibeam echosounder in the vicinity of the continental shelf break offshore of St. Petersburg, Florida, from May 4-9, 2014 (Fig. 1).
Jerram, Kevin W., Johnson, Paul D
core   +2 more sources

High-Performance Compression of Multibeam Echosounders Water Column Data [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019
Over the last few decades, multibeam echosounders (MBES) have become the dominant technique to efficiently and accurately map the seafloor. They now allow to collect water column acoustic images along with the bathymetry, which is providing a wealth of new possibilities in oceans exploration. However, water column imagery generates vast amounts of data
Jordi Portell, David Amblas, Garrett Mitchell, Matias Morales, Alberto G. Villafranca, Riccardo Iudica, Galderic Lastras   +6 more
openaire   +2 more sources

Detection of Submerged Targets Beyond Eyes' Observation Using Satellite Lidar and Multispectral Data

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract Detecting submerged targets in shallow waters from satellite platforms remains a challenge, as the optical spectral information of targets is significantly distorted by the absorption and scattering effects of the water column. In this study, we propose a new framework as the bathymetry‐informed target extraction, which integrates the ...
Hao Liu, Jian Yang, Yue Ma, Yao Li, Xiao Hua Wang   +4 more
wiley   +1 more source

Seismic Disturbance, Productivity and Depth Shape Hadal Benthic Habitats and Biodiversity in the Japan, Ryukyu and Izu‐Ogasawara Trenches (Northwest Pacific Ocean)

Journal of Biogeography, Volume 52, Issue 11, November 2025.
ABSTRACT Aim This study characterises benthic habitats and associated biodiversity in three Japanese subduction trenches, and explores the effects of trench‐specific differences in large‐scale seismic events, disturbance and productivity regimes on habitat structure and assemblage composition.
Denise J. B. Swanborn, Todd Bond, Heather A. Stewart, Elrond A. Garcia, Melanie S. Stott, Hiroshi Kitazato, Alan J. Jamieson   +6 more
wiley   +1 more source

Spatial and Temporal Changes of Tidal Inlet Using Object-Based Image Analysis of Multibeam Echosounder Measurements: A Case from the Lagoon of Venice, Italy

Remote Sensing, 2020
Scientific exploration of seabed substrata has significantly progressed in the last few years. Hydroacoustic methods of seafloor investigation, including multibeam echosounder measurements, allow us to map large areas of the seabed with unprecedented ...
Lukasz Janowski, Fantina Madricardo, Stefano Fogarin, Aleksandra Kruss, Emanuela Molinaroli, Agnieszka Kubowicz-Grajewska, Jaroslaw Tegowski   +6 more
doaj   +1 more source

Geophysical Prospecting for the Detection of Buried and Shallow Submerged Archaeological Sites of Roman Period in the Lagoon of Venice (Italy)

Archaeological Prospection, Volume 32, Issue 4, Page 1005-1019, October/December 2025.
ABSTRACT We present a study that combines several marine geophysical techniques to detect and map archaeological sites from the Roman period in the shallow waters of the Venice Lagoon, Italy. We employed marine electrical resistivity tomography (M‐ERT), a drone‐based unmanned surface vehicle (USV) multibeam sonar, and subbottom profiler technology to ...
Carlo Beltrame, Elisa Costa, Paolo Mozzi, Alberto Carrera, Jacopo Boaga   +4 more
wiley   +1 more source