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@jie-chen.bsky.social

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Javier Escartín @jescartin.bsky.social · 03/08/2026

What is the global length of mid-ocean ridges? & the offset of transform faults or non-transforms? This paper @Earth-Science Reviews doi.org/10.1016/j.ea... & the associated MAPRIDGES database, present, analyze & provide the geometry of ridge segmentation globally doi.org/10.17882/99981

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Javier Escartín @jescartin.bsky.social · 21/06/2026

And during #NODSSUM, to gather additionnal images from biota, ecosystems, and dumped radioactive waste barrels, the deep-sea camera system SCAMPI, that flies two to three meters above the seafloor, taking snaps every 10 seconds, over several km, towed behind the ship.

Control of the SCAMPI deep-towed camera system, that feeds video to the ship so it can be navigated 2-3 m above the seafloor, during the NODSSUM cruise. Credits: Quentin Gaillet, NODSSUM cruise, CNRS, Flotte Océanographique Française

The deep-towed camera system SCAMPI on the deck of Pourquoi Pas?, during the NODSSUM cruise. Credits: Quentin Gaillet, NODSSUM cruise, CNRS, Flotte Océanographique Française

Photo taken by the towed camera system SCAMPI showing a group of 6 barrels dumped at the seafloor during one of the tows conducted during the NODSSUM cruise. Credits: NODSSUM cruise, CNRS, Flotte Océanographique Française

Sea lily on rocky seafloor photographed by the SCAMPI camera system during one of the NODSSUM cruise camera tows. Credits: NODSSUM cruise, CNRS, Flotte Océanographique Française

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Javier Escartín @jescartin.bsky.social · 11/07/2025

🧪⚒️ #NODSSUM cruise - On land, material & samples make their way back to home labs. And this morning we showed sonar images of barrels & photos taken by Ulyx flying at ~10 m above seafloor. Lots to do back in labs & offices. It was intense - good intense. Images: see copyright etc in thread

Copyright Flotte Oceanographique Française - Nodssum cruise. Swath of Ulyx sonar data (left) and close-up of the barrels at the seafloor, showing as bright spots (from box on the left)

Copyright: Flotte Océanographique Française - Campagne NODSSUM. Barrel dumped at the seafloor at about 4700 m water depth

Copyright: Flotte Océanographique Française - Campagne NODSSUM. Barrel at the seafloor showing a probable leak of unknown material - probably tar used to embed the waste in the barrels.

Copyright: Flotte Océanographique Française - Campagne Nodssum. Sonar coverage during a dive of AUV Ulyx (gray background) covering a zone of approximately 6x3 km, with sonar swaths of about 400 m (horizontal stripes). The identified barrels shown as black dots line up along tracks followed by ships during barge dumping.

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Javier Escartín @jescartin.bsky.social · 16/01/2025

⚒️🧪🌊 25/25 -The #VG2024 leader completed the race after 64j19h22 at 17.8 knots. More than 26700 nm (~51000 km) crossing 4 major mid-ocean ridges (Mid-Atlantic, Southwest, South East & East Pacific Rise) & around Antarctica. Thnks to @jie-chen.bsky.social for the Spilhaus map: doi.org/10.1038/s415...

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Javier Escartín @jescartin.bsky.social · 18/12/2024

⚒️🧪🌊 How faults form @ the axis of mid-ocean ridges? Do fault parameters link to spreading rate, magma supply, volcanism? @jie-chen.bsky.social analyses high resolution bathymetry from deep-sea surveys, exploring temporal & spatial scales impacting fault growth: authors.elsevier.com/c/1kFYK_,1tQ...

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