Andrew Sewell’s Post

A recurring conversation I had at Oceanology International this year was around the efficacy of space-derived bathymetry and the challenges with turbidity. This case study from the #SentinelSuccess series is fascinating. Researchers from jOmegak Consulting and TCarta Marine demonstrated that Copernicus Sentinel-2 could produce survey results comparable to single-beam echo sounder surveys faster and cheaper.  Particularly useful in an area where moving amazon mud banks make navigation tricky. The method described by the team is independent of water turbidity. The depth is derived using the gravity wave dispersion law, which describes the change in wave celerity as the waves shoal and "feel the bottom." Wave motion is measured with the 1.79 s time delay between bands B08 and B8A.

Discover the vital role of mapmaking in understanding our changing world with our Northern Latitudes series. In this Q&A, Melissa Turner, marine geographer for Oceans North, discusses the importance of mapping in tracking climate-related changes in the North Water polynya, known as Pikialasorsuaq in Greenland and Sarvarjuaq in Nunavut. Read more about this crucial aspect of our work in the North: https://lnkd.in/gi7pgPze

RV CELTIC EXPLORER TRAVELS TO GREENLAND FOR RESEARCH SURVEY The Marine Institute’s RV Celtic Explorer set sail to west #Greenland in July, to facilitate a collaborative research survey between three American universities. The voyage will take the RV Celtic Explorer to remote locations beyond it’s typical expeditions in Irish waters, for scientists to observe how glaciers are changing using innovative technology. https://lnkd.in/emVjcEEz

CORAL REEF NEWS: 3D Models Show Coral Bleaching in New Light In a new study, marine biologists from Scripps Institution of Oceanography at UC San Diego and Arizona State University are providing a first-of-its-kind glimpse into coral “bleaching” responses to stress, using imaging technology to pinpoint coral survival rates following multiple bleaching events off the island of Maui. Using a time series of coral reef 3D models from Maui, a team of researchers led by Scripps Oceanography’s Smith Lab tracked the bleaching response of 1,832 coral colonies from 2014 to 2021. The seven-year data set provided detailed imagery of the reefs year-by-year, allowing the team to identify patterns of coral growth and survivorship through sequential bleaching events that occurred in 2015 and 2019. Read full story here: https://lnkd.in/eKhiujkA #coralreefs #coralnews #coralresearch #coralbleaching #coralhealth #coral #marinescience #coralreefecology #climatechange #marineecology #marinebiology

🚨 HII Delivers Advanced REMUS 620 UUVs to NOAA – A Major Leap Forward for Ocean Mapping and Restoration! 🌊 Huntington Ingalls Industries (HII) has delivered two state-of-the-art REMUS 620 uncrewed underwater vehicles (UUVs) to NOAA, specifically designed for high-resolution ocean floor mapping. 🌍 This is huge news for ocean research and restoration! The REMUS 620, introduced in 2022, represents a significant advancement in UUV technology. With its enhanced capabilities—both above and below water—it’s tailor-made for long-distance operations, helping NOAA accelerate critical environmental efforts. These vehicles will be deployed in the Gulf of Mexico to restore seafloor habitats damaged by the Deepwater Horizon oil spill, pushing forward marine exploration and habitat restoration like never before. 🚤🌱 HII’s swift delivery highlights the growing demand for the REMUS 620 and its ability to deliver cutting-edge technology that meets urgent mission needs. NOAA’s use of these advanced UUVs will transform habitat restoration, marine archaeology, and oceanographic research—enhancing our ability to protect and understand the marine environment. 🌊 Globally, over 600 REMUS UUVs are in operation across more than 30 countries, including 14 NATO member nations, and their longevity speaks volumes about their durability and versatility. This is a major step forward for ocean tech, sustainability, and environmental recovery. #OceanTech #UUV #MarineResearch #EnvironmentalRestoration #Innovation #Sustainability #OceanMapping #DeepwaterHorizon #NOAA #FutureOfOceans

The monitoring of energetic areas, such as the southwestern tip of the Iberian Peninsula (#CapeStVincent), is essential for understanding the complexity of the ocean dynamics and to predict future developments via ocean models and their validation through comprehensive datasets. 🌊 In this publication we present a high spatial and temporal resolution Eulerian physical and biogeochemical dataset from the Iberian Margin Cape St. Vincent ocean observatory (IbMa-CSV), a facility of the European Multidisciplinary Seafloor and water column Observatory European Research Infrastructure Consortium (EMSO ERIC ) at the edge of the continental slope in 10nm south of Cape St. Vincent, Portugal. Authors: Sarah A. Rautenbach, Paulo Relvas, Carlos Mendes de Sousa, Mafalda Carapuço Affiliations during data acquisition and preparation: Centre of Marine Sciences (CCMAR), IPMA Instituto Português do Mar e da Atmosfera #oceanography #ocean #observation #monitoring #EMSOEric #Portugal #physicaloceanography

🌊 Exciting insights from the depths of the Danube River! 🌊   In #2023 our Marine Research team has been hard at work, utilizing the power of Acoustic Doppler Current Profilers (ADCP) to gather data on the water flow velocities and direction of the Danube River. These data served as input for hydraulic modeling. The vibrant image below, generated from our Teledyne Marine RDI #RiverRay ADCP data collection overlaid on #multibeam bathymetry, vividly showcases the dynamic movement of water from one shore to another. 🚢💧   ADCP technology is a game-changer in oceanography, allowing us to measure current speeds across entire water columns, from the seafloor to the surface. This enables us to understand how ocean currents transport nutrients, heat, and sediments, which is vital for studying marine ecosystems, climate change, and geological processes.   Key highlights of ADCP technology:   Measures current speed at various depths with high precision 🎯 Provides comprehensive data on the movement of water and its constituents 📊 Supports safe and efficient planning for ROV dives and other marine operations 🌊 Despite its advantages, ADCPs come with challenges, such as balancing data precision with measurement range and ensuring reliable readings in clear or turbulent waters. Nevertheless, their ability to deliver high-resolution insights into ocean dynamics makes them indispensable in marine research.   Join us in celebrating these advancements and stay tuned for more groundbreaking discoveries from our dedicated Marine Research team! 🌐📈   #MarineResearch #Oceanography #ADCP #OceanCurrents #ClimateChange #MarineScience #Innovations #TechInScience #MarineResearch #Oceanography #ADCP #OceanCurrents #ClimateChange #MarineScience #Innovations #TechInScience #HydraulicModeling #WaterFlow #RiverScience #DanubeRiver #Hydrology #EnvironmentalScience #MarineTechnology #WaterResearch #ScienceInnovation #TeledyneRDI #RiverRay #DataScience #Bathymetry #CurrentProfiling #ScientificResearch #WaterConservation #MarineEcosystems #SedimentTransport #NutrientCycling

Bathymetery : Mapping Ocean Floors Bathymetry is the study and mapping of the ocean floor's topography, including its depths, contours, and features. It utilizes various methods such as sonar, satellite altimetry, and depth soundings to measure and represent the underwater terrain. By collecting depth data at different points across the ocean, bathymetric maps can be created to visualize the seafloor's morphology. These maps are crucial for understanding oceanic processes, identifying underwater features like trenches, ridges, and seamounts, and studying marine habitats and ecosystems. Bathymetry aids in navigation, marine resource exploration, submarine cable routing, and geological research. Additionally, it plays a vital role in oceanography, helping scientists model ocean currents, study tides and waves, and investigate plate tectonics. Overall, bathymetry provides essential insights into the hidden world beneath the ocean's surface, enabling us to better comprehend and manage our planet's marine environments. The following visualization used bathymetric data to create a 3D map of South Sandwich Trench. The South Sandwich Trench is one of the deepest oceanic trenches in the world, located in the South Atlantic Ocean. With depths reaching over 8,400 meters (27,559 feet), it represents a significant geological feature associated with the subduction zone where the South American Plate converges with the smaller South Sandwich Plate. Meteor Deep, a sub-region within the South Sandwich Trench, is among the deepest points within this trench system, plunging to depths exceeding 8,200 meters (26,900 feet). Its extreme depth makes it an area of interest for scientific research, particularly in understanding oceanic geology, marine biodiversity, and hydrothermal vent systems. Find the Global Bathymetery Data here: https://lnkd.in/g6a6n3Ch #bathymetery #oceanmapping #gis #oceanography #gismapping #oceanfloormapping #3dvisualization

With the use of cutting-edge non-destructive testing methods, investigate the structural integrity of historic buildings! A study of the Hermitage of San Segundo in Spain shows how structural faults can be found and analyzed by integrating infrared thermography, terrestrial laser scanning, and ground-penetrating radar. This all-inclusive method aids in the decision-making process for preservation and restoration. Find out how to protect cultural treasures using modern technology! Read more at: https://lnkd.in/dVj3W3fy Structural integrity, historic buildings, non-destructive testing, geophysical techniques, optical techniques, ground-penetrating radar, laser scanning, infrared thermography, preservation, cultural heritage. #HeritagePreservation #NDT #CulturalHeritage #StructuralIntegrity #Restoration #AdvancedTechniques #HistoricBuildings

🚢A cargo ship that serves as an oceanographic data-gathering vessel in WHOI’s ScienceROCs program will soon boast a new biological sensor! In a joint study between WHOI’s Magdalena Andres and colleagues at ASU Bermuda Institute of Ocean Sciences and Arizona State University, the CMV OLEANDER III will be outfitted with an environmental DNA (eDNA) sampler this winter. The device filters genetic material from seawater so scientists can “fingerprint” the animals that have passed through it. The device is time-tested on underwater vehicles and stationary moorings, but it's the first time an eDNA sampler has been installed on a marine vessel. Coupled with other oceanographic sensors, the data gathered by Oleander is critical to understanding the biodiversity and long-term physical processes taking place along the Gulf Stream as the ship makes its weekly round trip between New Jersey and Bermuda. WHOI currently manages the Oleander Project, a 30-year effort to monitor circulation in the Northwest Atlantic Ocean, supported by the National Science Foundation (NSF). 📲Find out how cargo ships are helping scientists gather data: https://lnkd.in/eTCwZypk 📸: Charles Flag (Stony Brook University School of Marine and Atmospheric Sciences) and Magdalena Andres with M/V Oleander. Flagg co-founded the Oleander Project in 1992 with Thomas Rossby at the University of Rhode Island Graduate School of Oceanography.