Article
Oceanography
D. Frey, A. R. Piola, V. A. Krechik, D. Fofanov, E. G. Morozov, K. P. Silvestrova, R. Yu Tarakanov, S. Gladyshev
Summary: Direct velocity measurements of the Malvinas Current were conducted using a Shipborne Acoustic Current Profiler, revealing two branches of the current - an inshore branch with faster velocities and a main offshore branch. The current is identified as a cold western boundary current originating from the Subantarctic Front of the Antarctic Circumpolar Current.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Multidisciplinary Sciences
Luciano P. Pezzi, Ronald B. de Souza, Marcelo F. Santini, Arthur J. Miller, Jonas T. Carvalho, Claudia K. Parise, Mario F. Quadro, Eliana B. Rosa, Flavio Justino, Ueslei A. Sutil, Mylene J. Cabrera, Alexander V. Babanin, Joey Voermans, Ernani L. Nascimento, Rita C. M. Alves, Gabriel B. Munchow, Joel Rubert
Summary: Sea surface temperature anomalies caused by warm core eddies in the Southwestern Atlantic Ocean have a significant impact on modifying the marine atmospheric boundary layer, increasing heat fluxes and wind speeds, and causing the ocean to act as a CO2 source in midlatitudes. The CO2 fluxes are closely related to SST, with higher SST within warm core eddies leading to larger flux magnitudes.
SCIENTIFIC REPORTS
(2021)
Article
Oceanography
Veronica Morales-Marquez, Ismael Hernandez-Carrasco, Baylor Fox-Kemper, Alejandro Orfila
Summary: We investigated the effects of Ekman currents and Stokes drift on the surface transport and mixing properties of the Mediterranean Sea. Using satellite data, we calculated Finite Size Lyapunov Exponents (FSLE) and found that the transport pathways were significantly influenced by non-geostrophic currents, leading to a decrease in eddy retention capacity. Regional and temporal analysis showed an increase in horizontal mixing processes, particularly in the presence of intense and persistent wind and waves. Our findings suggest that the Mediterranean Sea has experienced an increase in mixing intensity in recent decades, with ageostrophic features playing a role in relative dispersion properties.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Oceanography
Dmitry I. Frey, Alberto R. Piola, Eugene G. Morozov
Summary: Field measurements were conducted to study the velocity distribution of the Malvinas Current at the western slope of the Argentine Basin in the South Atlantic Ocean. The measurements revealed significant differences in current structures at different locations, and indicated the convergence of two current branches at 46°S and 44°S. This finding contradicts the results obtained from satellite altimetry, highlighting the importance of direct velocity observations.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Engineering, Marine
Sheng Yan, Zhili Zou, Zaijin You
Summary: This study derives the Eulerian description of the Stokes drift effect on tracer transport, showing that it can be automatically accounted for in the wave-averaged advection-diffusion equation. The theoretical analysis is verified through numerical simulations and experimental observations.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Meteorology & Atmospheric Sciences
C. Spencer Jones, Qiyu Xiao, Ryan P. Abernathey, K. Shafer Smith
Summary: The manuscript presents a method to remove barotropic motions and inertia-gravity waves from surface velocities and sea-surface height using Lagrangian filtering. This method effectively preserves super-inertial motions in the Earth's reference frame and the high-frequency energy from Doppler shifted balanced motions. Convergent motions near frontogenesis regions are included in the non-wave velocity field that is preserved more effectively by Lagrangian filtering.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2023)
Article
Meteorology & Atmospheric Sciences
S. L. Ward, P. E. Robins, A. Owen, J. Demmer, S. R. Jenkins
Summary: Biophysical models often face computational challenges when trying to map larval dispersal over several weeks in large-scale domains. This study evaluates the sensitivity of simulated larval dispersal in the nearshore to model spatial resolution. Results suggest that a spatial resolution of <= 100 m should be used for dispersal studies in the nearshore zone, highlighting the importance of appropriately scaled models in simulating material transport within the coastal zone.
Article
Oceanography
Ma. Eugenia Allende-Arandia, Rodrigo Duran, Laura Sanvicente-Anorve, Christian M. M. Appendini
Summary: This study assesses the transport of suspended material by surface ocean currents, revealing pathways from the Equatorial Atlantic to different regions in the Caribbean Sea. Windage is a significant factor in determining particle clustering and travel time. Spatial patterns of Eulerian velocity and Lagrangian patterns can be reproduced and understood using dynamical systems and unsupervised neural networks. This study improves our understanding of transport mechanisms in the Western Atlantic and the Caribbean Sea, which is crucial for marine ecosystem management and conservation.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Environmental Sciences
Zhengbei Zhang, Jing Wang, Jiajia Hao, Dongliang Yuan, Kunxiang Wang
Summary: Cross-equatorial pathways of heat and salt are analyzed in the Eastern Indian Ocean using Lagrangian trajectories based on model simulation and observational data. The results show that particles released in the Bay of Bengal move across the equator near the eastern boundary of the upper Indian Ocean during the southwest monsoon season. The estimated annual mean salt and heat transports are southward across the equator.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Paleontology
Natalia Garcia Chapori, Cecilia Laprida
Summary: The study analyzed planktonic foraminifera data from the Brazil-Malvinas Confluence region, finding that species distribution and abundance are mainly influenced by mixed layer temperature and depth, with the most accurate reconstructions using sub-surface temperatures. Applying a new calibration function to a sediment core from the Holocene revealed a northward displacement of the Brazil-Malvinas Confluence and a significant influence of the Malvinas Current throughout the entire Holocene.
Article
Engineering, Marine
Stefano Querin, Simone Cosoli, Riccardo Gerin, Celia Laurent, Vlado Malacic, Neva Pristov, Pierre-Marie Poulain
Summary: The study used a high-resolution hydrodynamic model to replicate and analyze the eddy structure in the Gulf of Trieste, and evaluated the model's ability to reproduce observed data as well as its sensitivity to external forcing factors (such as wind, river, and tides) to reveal the drivers of eddy formation.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Oceanography
Sean R. Haney, Alexandra J. Simpson, Jacqueline M. McSweeney, Amy F. Waterhouse, Merrick C. Haller, James A. Lerczak, John A. Barth, Luc Lenain, Andre Paloczy, Kate Adams, Jennifer A. MacKinnon
Summary: The study presents observations of a submesoscale gravity current front created by a shoaling internal tidal bore in the coastal ocean, and discusses the process of separation from the bore, as well as the subsequent propagation as a gravity current. The study also highlights the development of lateral shear instabilities along the front, which may accelerate its demise.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Fisheries
Taha Imzilen, David M. Kaplan, Nicolas Barrier, Christophe Lett
Summary: This study used a Lagrangian particle-tracking model to simulate the drift of drifting fish aggregating devices (dFADs) in the Atlantic and Indian Oceans. The simulations showed that using the ocean model output (GLORYS12V1) provided more accurate results compared to satellite-derived ocean currents products (OSCAR and GEKCO). The study also found that the predictive ability of the model was higher for individual dFAD movements in the Indian Ocean than in the Atlantic Ocean.
FISHERIES RESEARCH
(2023)
Article
Economics
Gang Duan, Amin Aghalari, Li Chen, Mohammad Marufuzzaman, Junfeng Ma
Summary: Large floating debris in the ocean has significant impacts on the environment, human health, and economy. A vessel routing optimization model considering time windows for debris collection is proposed to mitigate the risks, with experimental results showing that the ALNS algorithm outperforms GUROBI and B&C algorithms in terms of efficiency and cost.
TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW
(2021)
Proceedings Paper
Engineering, Ocean
Daniel Mihai Toma, Matias Carandell, Joaquin del Rio
Summary: This study compares the measurements of currents, waves, and sea surface temperatures in various sea conditions using different designs of drifters to determine the optimal casing design for detecting wave-current interactions.
2022 IEEE INTERNATIONAL WORKSHOP ON METROLOGY FOR THE SEA LEARNING TO MEASURE SEA HEALTH PARAMETERS (METROSEA)
(2022)
Review
Oceanography
Mikel Latasa, Renate Scharek, Xose Anxelu G Moran, Andres Gutierrez-Rodriguez, Mikhail Emelianov, Jordi Salat, Montserrat Vidal, Marta Estrada
Summary: A detailed study on the composition and dynamics of phytoplankton in the northwestern Mediterranean Sea revealed significant variability in different seasons and environmental conditions.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Engineering, Marine
Alexander G. Ostrovskii, Mikhail Emelianov, Oleg Y. Kochetov, Vyacheslav V. Kremenetskiy, Dmitry A. Shvoev, Sergey V. Volkov, Andrey G. Zatsepin, Nikolai M. Korovchinsky, Vladimir M. Olshanskiy, Alexander Olchev
Summary: This study provides an overview of a carbon observational site in the Northeastern Black Sea and introduces a new tethered profiler called Winchi for the inner continental shelf part of the site. The profiler uses a winch system to ascend and descend, measuring depth profiles of marine environment parameters and transmitting data using GPS and GSM.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Correction
Geochemistry & Geophysics
Marta Arjona-Camas, Pere Puig, Albert Palanques, Ruth Duran, Martin White, Sarah Paradis, Mikhail Emelianov
MARINE GEOPHYSICAL RESEARCH
(2022)
Review
Oceanography
Elena Roget, Josep L. Pelegri, Jesus Planella-Morato, Joan Puigdefabregas, Mikhail Emelianov, Ignasi Valles-Casanova, Dorleta Orue-Echevarria
Summary: Diapycnal mixing in the Brazil-Malvinas Confluence Zone (BMC) was assessed based on microstructure measurements during an April 2017 cruise. Active turbulence was observed at all depths and stations, with high-dissipation patches ranging from several metres to a few tens of metres. The frontal zone showed high energy dissipation and eddy diffusivity, with higher values in the south compared to the north of the BMC.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Environmental Sciences
M. Pilar Olivar, Arturo Castellon, Ana Sabates, Airam Sarmiento-Lezcano, Mikhail Emelianov, Ainhoa Bernal, Yang Yang, Roland Proud, Andrew S. Brierley
Summary: This study examines the variability in mesopelagic fish communities and the influence of environmental factors on their diversity in five zones around the Iberian Peninsula. The results show significant differences in fish populations between the Mediterranean and Atlantic sides, with temperature and salinity being the main factors explaining the variation. The study also highlights the differences in species distribution between the two regions.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Studies
Gala Moreno, Joaquin Salvador, Iker Zudaire, Jefferson Murua, Josep Lluis Pelegri, Jon Uranga, Hilario Murua, Maitane Grande, Josu Santiago, Victor Restrepo
Summary: Fishers and scientists are collaborating to design biodegradable fish aggregating devices (bio-FADs) for efficient fishing in the tropical Pacific, Atlantic, and Indian Oceans. The conventional drifting FAD (dFAD) design, using organic ropes and canvases instead of plastic, has a shorter lifespan due to structural stress. To overcome this, a paradigm shift is proposed to minimize stress by redesigning bio-FAD structures, such as the jelly-FAD, which mimics the buoyancy of jellyfish. Preliminary results show that the jelly-FAD aggregates tuna and has a lifespan of over 6 months at sea, with similar drifting speeds to conventional dFADs.
Article
Engineering, Ocean
Anna Olive Abello, Josep L. Pelegri, Francisco Machin
Summary: A simple model-dependent approach called the radial offset by diffusion (ROD) method is proposed for estimating horizontal diffusivity in the southwestern South Atlantic. The method compares actual displacements of field drifters with numerical trajectory predictions to determine the diffusive motions not captured by the numerical model. The ROD method is validated for both numerical and field applications.
JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Marta Martin-Rey, Ignasi Valles-Casanova, Josep L. Pelegria
Summary: The study investigates the impact of tropical Atlantic Ocean variability modes on the variability of the upper-ocean circulation. Multiple datasets including oceanic reanalyses, simulations, and satellite data were utilized for the period 1982-2018. The results reveal significant changes in the surface and subsurface ocean currents during the emergence of Atlantic meridional mode (AMM), Atlantic zonal mode (AZM), and the connection between AMM and AZM. Ocean waves play a crucial role in connecting tropical and equatorial ocean transport.
JOURNAL OF CLIMATE
(2023)
Article
Geosciences, Multidisciplinary
Ludmila Caetano, Carles Guallar, Jacobo Martin, Montserrat Vidal, Leticia Cotrim da Cunha, Rosemary Vieira, Leonardo Amora-Nogueira, Josep L. Pelegri, Humberto Marotta
Summary: This study investigates the small-scale distribution of pCO2 in the subantarctic Atlantic Patagonian waters, specifically in the Argentinian Beagle Channel. The findings suggest the persistence of pCO2 below atmospheric equilibrium in this area and reveal the influences of physical and biological factors, such as temperature, salinity, and chlorophyll-a fluorescence, on the variability of pCO2. The study also highlights the importance of metabolic and physical controls on the sequestration of atmospheric carbon in subpolar coastal waters.
JOURNAL OF MARINE SYSTEMS
(2023)
Article
Environmental Sciences
Marta Umbert, Eva De-Andres, Rafael Goncalves-Araujo, Marina Gutierrez, Roshin Raj, Laurent Bertino, Carolina Gabarro, Jordi Isern-Fontanet
Summary: This study assesses the capability of the Surface Quasi-Geostrophy (SQG) method in reconstructing the three-dimensional (3D) dynamics in four critical areas of the Arctic Ocean. The results show that the reconstruction using sea surface height (SSH) fields is highly accurate, even in areas with freshwater inputs. However, surface buoyancy reconstruction fails due to the uncorrelation of surface buoyancy and subsurface potential vorticity. Surface currents reconstruction correlates well with the total velocities. Furthermore, applying the SQG method to satellite-derived sea level anomalies shows better performance in fall and winter compared to spring and summer, due to lower stratification. These findings have important implications for future remote sensing missions in the Arctic Ocean.
Article
Oceanography
Dorleta Orue-Echevarria, Kurt L. Polzin, Alberto Naveira C. Garabato, Alexander Forryan, Josep L. Pelegri
Summary: This study evaluates the rates of isopycnal stirring, water mass transport, and diapycnal mixing across the Brazil-Malvinas Confluence (BMC) using microstructure and hydrographic measurements. The results show widespread isopycnal stirring and weak diapycnal mixing in the BMC, with isopycnal stirring prevailing in deeper layers. Eddies are found to have an important cross-BMC transport, suggesting that eddy-induced flows significantly contribute to the transfer of waters in the region.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Oceanography
Cristina Arumi-Planas, Maria Dolores Perez-Hernandez, Josep L. Pelegri, Pedro Velez-Belchi, Mikhail Emelianov, Veronica Cainzos, Luis Cana, Yvonne L. Firing, Luis Garcia-Weil, Daniel Santana-Toscano, Alonso Hernandez-Guerra
Summary: The South Atlantic Ocean plays a crucial role in the heat exchange of the climate system by hosting the returning flow of the Atlantic Meridional Overturning Circulation (AMOC). Through data analysis from hydrographic cruises, we have identified different water masses and calculated their circulation patterns in the South Atlantic Subtropical gyre. We have also assessed the strength of the AMOC, heat transport, and freshwater flux in this region.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Oceanography
Pernille Tonnesen, Shane Gero
Summary: Studying the behavior of deep-sea animals is challenging, but animal-borne camera tags may help understand predator-prey interactions. Research showed that camera-associated white light may affect foraging behavior, but has minimal long-term fitness impact on sperm whales. However, this impact should be considered and monitored for longer camera tag deployments.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2024)
Article
Oceanography
Sarah N. de Mendonca, Anna Metaxas
Summary: Ecological processes impact spatial patterns in abundance and distribution of megafauna. This study used spatial statistics to identify significant megafaunal patterns in the Laurentian Channel Marine Protected Area. The patterns varied among taxa and were related to geological factors. The study highlights the importance of considering fine-scale patterns and provides insights for ecological research, monitoring, and conservation in deep-sea ecosystems.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2024)