Submarine canyons are more common on steep slopes shaped by tectonic forces and cooling seafloor than previously thought. Earlier models emphasized river input as the primary cause.
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#SeafloorMapping
#Geology
#OceanScience
Paper
www.science.org/doi/10.1126/...
🌊 LIVE this Thurs, June 5 at 6:30 PM ET!
GMSO CEO G. Mark Miller joins Victor Vescovo, Vicki Ferrini & Craig McLean for “The Future of Ocean Exploration” at The Explorers Club.
📍 Watch on explorers.org, YouTube & Facebook
#WorldOceansWeek #GMSO #OceanExploration #SeafloorMapping #ExplorersClub
A high-resolution synthetic aperture sonar (SAS) backscatter image (top), with field of view (FOV) of the representative images from a closed-circuit dive at a 33 m deep rock-sand interface in Bustan HaGalil Ridge. The red line represents the transect line seen in image A.
[5/5] Bien que coûteux (plusieurs millions d’euros), le SAS est de plus en plus accessible grâce aux services commerciaux. Il ouvre des perspectives majeures en écologie, géologie et gestion durable des fonds marins, à condition d’avoir les moyens techniques. #geography #seafloormapping #deepsea
(A) Map of the Northern Israeli coast with the position of the study area, including the world reference. Dark blue depth contour showing >60 m depth (Kanari et al., 2020). (B) Multibeam Echo Sonar (MBES) bathymetry derived Digital Elevation Model (DEM) layer used to generate complexity indices such as the slope and broad-scale bathymetric position index (BBPI) seen in (C and D). The red outline shows the area used for the classification pipeline. (E) An example of the 3 cm resolution SAS image used for the image recognition algorithm. Habitat types such as small rocks, continuous rocks, mixed surfaces and sand are easily identified by their distinct features. The outcrop window illustrates how the sonar can identify algae overgrowth on the rocky substrate.
[4/5] Utilisé pour l’archéologie sous-marine, le SAS a permis d’identifier 54 épaves alliées et leurs cargaisons toxiques en mer du Nord. Cette cartographie fine pourrait guider des opérations de dépollution et renforcer la surveillance environnementale. #geography #seafloormapping #deepsea
[3/5] L’imagerie SAS a révélé de nouveaux évents hydrothermaux dans les Galápagos et une nurserie de requins en Méditerranée. Ces découvertes améliorent la compréhension des écosystèmes profonds et justifient parfois la création de zones marines protégées. #geography #seafloormapping #deepsea
[2/5] Le SAS fonctionne comme un radar satellite mais sous l’eau, en reconstituant des images par ondes sonores. Malgré les défis techniques, il peut cartographier 5 km² en 6 h et distinguer sable, roches ou algues sur les récifs, comme en Israël en mars 2025. #geography #seafloormapping #deepsea
#TechnologyTuesday: #SeafloorMapping is important to get a more complete picture of the ocean. This photo shows a portion of the seafloor before (using only satellite data) and after an #EVNautilus pass with multibeam sonar data processed in QPS Qimera.
Interferometric synthetic aperture sonar images of the seafloor. (a) Wreck of a barge on a sediment substrate with boulders. (b) Offshore energy production infrastructure. (c) Fresh lava flows (pillow basalts, sheet flow with ropy lava texture) from a mid-ocean ridge. (d) Discarded rope next to bedrock outcrop and sand and gravel sediments. Both bedding planes and glacial striations are visible in the outcrop. Image resolution is 3 cm for all images. Data for images a, b, and d were collected using a Kraken Robotics MINSAS 180 system mounted on Kraken’s Katfish towed vehicle. Data for image c was collected using a Kraken Robotics MINSAS 120 mounted on the Schmidt Ocean Institute remotely operated vehicle SuBastian.
During a 2023 expedition, Dr. John Jamieson & an international team tested this sonar system. This tech transforms the ability to map, explore, classify, & monitor the seafloor in detail, & dramatically reduces the time needed to locate seafloor features. #seafloormapping
tos.org/oceanography...
The latest #seafloormapping update is here, via the Interagency Working Group on Ocean and Coastal Mapping. According to their sixth annual report on progress made in mapping U.S. ocean, coastal, and Great Lakes waters, we've mapped 54% of US waters. Learn more: bit.ly/4iQgJSx
Next-Generation Water Satellite Maps Seafloor From Space #Science #EarthSciences #Oceanography #WaterSatellite #SeafloorMapping #EarthScience
www.sciencefocus.com/planet-earth... #bioluminescence #blindspot #greatwhiteshark #microplastics #mysteries #nanoplastics #ocean #oceanmysteries #oceannoises #orca #plastic #seabed2030 #seafloor #seafloormapping #water #yonaguni
Mapping the unknown is the first step to understanding and protecting it. 🌊📍 New seafloor data informs climate research, conservation & sustainable management. With investment, what was once unseen can be safeguarded for the future. #AntarcticClimateConnections #SeafloorMapping #TheDeepOceanWeNeed
#FBF to our NA152 expedition where #seafloormapping intern Vincent Johnson curated a soundtrack for his expedition sailing from British Columbia to Honolulu: bit.ly/3ED6S3c
For #MappingMonday, we invite you to review some of the common #seafloormapping terms you'll hear used by our team through this #blog: nautiluslive.org/blog/2018/08...
"The best discoveries often lie just beyond the roadblocks," says former USGS intern as she shares her journey using multibeam sonar and learning the ropes of #seafloormapping 🗺️
Read how she forged a career pathway in #geoscience 🌏 https://ow.ly/9IKg50TXK3A
"Atlantic Canyons: Pathways to the Abyss" Receives Partnering Award www.ecomagazine.com/news/science/atlantic-ca... #oceans #seafloormapping
