iiinova — where your digital self keeps evolving

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

252

Reposted by Javier Escartín

The OHA-GEODAMS Seafloor Observatory @geodams.bsky.social · 08/07/2026

The news is out today in @nature.com ! The OHA-GEODAMS observatory had the incredible luck to capture a major seafloor spreading event back in 2024, just 2 months after its deployment. You can read all about it at: www.nature.com/articles/s41... Here’s how it unfolded 👇

nature.com

Anatomy of a seafloor spreading event captured by in situ seismogeodesy - Nature

By combining hydroacoustic, direct-path ranging and bottom-pressure measurements, in situ observations of a rifting event at a segment of the Southeast Indian Ridge are reported, providing insight int...

21311

Javier Escartín @jescartin.bsky.social · 02/07/2026

The #NODSSUM docked @ Brest Sun 28th. Exciting science: 19 Nautile dives to 4700 m, more than 100 barrels imaged, sediment, biota & water filter, coring, fish traps... peek to photos & videos for a week here: www.swisstransfer.com/d/22d399c8-a... From tomorrow here: sdrive.cnrs.fr/s/t7jH3ofqfk...

Degraded barrel with material spilt the seafloor at the radioactive waste dump site of the Northeast Atlantic, showing colonization by anemonae among other forms of deep-sea life, and a sediment sampling device planted nearby. Following a Nautile inspection of the barrel, sediment samples were obtained from its immediate vicinity.

Credits: NODSSUM Cruise, CNRS, Flotte Océanographique Française, IFREMER, MISO Facility/WHOI

Barrels showing markings and lying at the seafloor within the Northeast Atlantic radioactive waste dump site, filmed by Nautile during the NODSSUM’26 cruise, at 4700 m depth.

Credits: NODSSUM Cruise, CNRS, Flotte Océanographique Française, IFREMER, MISO Facility/WHOI

Barrel of radioactive waste lying at the seafloor by a rock outcrop at the Northeast Atlantic dump site filmed by Nautile at 3500m during the NODSSUM’26 cruise. In its vicinity deep sea fish, corals, and sponges were observed.

Credits: NODSSUM Cruise, CNRS, Flotte Océanographique Française, IFREMER, MISO Facility/WHOI

Sediment sampling near a barrel in the radioactive waste dump area (Northeast Atlantic) at 4700 m, with the submersible Nautile deployed during the NODSSUM'26 Cruise.

Credits: NODSSUM Cruise, CNRS, Flotte Océanographique Française

24416

Javier Escartín @jescartin.bsky.social · 26/06/2026

And after a night camera tow photographing the seafloor, a last, short Nautile dive for the #NODSSUM cruise - over a whale fall and its ecosystem and final inspection of radioactive waste barrels. Now en route to Brest: writing, packing, back ups of data, cleaning labs… ETA Sunday afternoon

Preparations of Nautile immediate before going into the water. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

Nautile ready to plunge into the ocean for the last dive of the #NODSSUM cruise. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

Recovery of Nautile after the last dive of the #NODSSUM cruise. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

Nautile back on deck after the last dive of the #NODSSUM cruise. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

0104

Reposted by Javier Escartín

GDR-SciNEE @scinee.bsky.social · 22/06/2026

Thanks to the use of the submersible Nautile, the #NODSSUM campaign have been able to collect samples from the barrels as well as seawater, sediment and marine organisms. At each return of Nautile from a dive, radiation levels on the sub and in the samples are controlled by the radioprotection team.

Checking the Nautile and samples. Credit: NODSSUM cruise, CNRS, Flotte Océanographique Française (2026)

When the checks are completed, the samples can then be further processed by the researchers (here sediment sample). Credit: NODSSUM cruise, CNRS, Flotte Océanographique Française (2026)

Some samples (here sediment) are screened with a more sensitive gamma. Credit: NODSSUM cruise, CNRS, Flotte Océanographique Française (2026)

The presence of man-made radionuclides such as Americium and Cesium could be identified in the gamma spectrum of some collected samples. Credit: NODSSUM cruise, CNRS, Flotte Océanographique Française (2026)

095

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

Rainy day start - with preps for the #NODSSUM cruise dive 2194, 16th of this cruise: launch the elevator to 4700 m with corers for Nautile, checks on the sub, prep of the basket… and the tool shack.

Deployment of an elevator with sampling tools for Nautile, before its 2194th dive down to 4700 m. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

Last checks of Nautile prior to its 2194th dive down to 4700 m, 16th of the NODSSUM cruise. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

Prepearing the basket of Nautile and installation of sampling tools prior to its 2194th dive down to 4700 m, 16th of the NODSSUM cruise. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

Nautile’s tool shack in the hangar of the Pourquoi Pas? During the NODSSUM cruise. Credit: NODSSUM cruise, CNRS, Flotte Oceanographique Française

074

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

064

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

Sediments provide a good environmental record of both natural and artificial radionuclides. To sample them, #NODSSUM deploys from the ship a coring system with multiple tubes, that preserves the interface between water and sediment, critical to our studies. 7 coring sites to date, more to come.

Deployment of the multicoring system Octopus during the NODSSUM cruise. Credit: Quentin Gaillet, NODSSUM Cruise - CNRS - Flotte Océanographique Française.

Recovery of the multicoring system Octopus, with sediment and water in the coring tubes, during the NODSSUM cruise. Credit: Quentin Gaillet, NODSSUM Cruise - CNRS - Flotte Océanographique Française.

Recovery of sediment samples for processing during the NODSSUM cruise. Credit: Quentin Gaillet, NODSSUM Cruise - CNRS - Flotte Océanographique Française.

Processing in the lab of sediment samples obtained with the multicoring system Octopus during the NODSSUM cruise. Credit: Quentin Gaillet, NODSSUM Cruise - CNRS - Flotte Océanographique Française.

043

Javier Escartín @jescartin.bsky.social · 20/06/2026

Catching up on #NODSSUM cruise - on instruments we deploy, and starting with water pumps, lowered either in moorings or attached to the ship's. Run by DT-INSU (CNRS), they pump around 1000 litres over 4hrs & capture radionuclides & organic matter w/ special filters to be later analysed.

Deployment of water pumps on a cable. Copyright: NODSSUM CRUISE, CNRS - Flotte Océanographique Française

Water pumps ready to deploy. Copyright: NODSSUM CRUISE, CNRS - Flotte Océanographique Française

031

Reposted by Javier Escartín

Anca B. @b-anca.bsky.social · 15/06/2026

Today we also learned that Russia is behind the arson attacks on K.Starmer’s properties. Europe has become a less safe place because of Russia’s hybrid warfare. We should take drastic measures against Telegram, app cited in almost all investigations as a source of Russian recruitment of attackers.

59925

Javier Escartín @jescartin.bsky.social · 10/06/2026

The #NODSSUM cruise reaches cruise speed. Three Nautile dives have recovered sediment, biologic specimens, water, and video of dumped barrels and ecosystems- plus towed camera runs and fish traps (2 abyssal grenadines to date) - with fair weather ahead after a stormy start.

0144

Javier Escartín @jescartin.bsky.social · 05/06/2026

#NODSSUM Pourquoi Pas? is in stand by - waiting on weather (WOW), with a depression passing over us. Sunday we plan our first Nautile dive after 1 week of unfriendly seas, and operations will start rolling. 1st dive over one of the selected radioactive waste barrel sites

1116

Javier Escartín @jescartin.bsky.social · 25/05/2026

#NODDSUM the new home till the end of June - Le Pourquoi Pas? de la flotteoceanographique.fr, w/ Nautile submarine onboard. The team converges to Brest this Monday w/ more material & instruments. Tomorrow boarding & lab set-up, departure Wed 27th 1st thing in the morning.

093

Javier Escartín @jescartin.bsky.social · 19/05/2026

#NODSSUM a week away from departure for 2nd NODSSUM cruise @ NE Atlantic nuclear waste dump site we visited last year. Last-minute prep w/ transport of cruise material towards Brest - Including an important box just received. W/ the French Oceanographic Fleet, onboard #pourquoipas + #nautile

084

Reposted by Javier Escartín

tonywright65-54.bsky.social @tonywright65-54.bsky.social · 21/04/2026

New evidence submitted by Greenpeace International to the International Seabed Authority (ISA) suggests deep-sea mining contractors, particularly those linked to The Metals Company (TMC), may have breached exploration contracts and international law. oceanographicmagazine.com/news/new-evi...

oceanographicmagazine.com

New evidence suggest breaches by deep sea mining contractors - Oceanographic

Greenpeace has submitted new evidence to an ongoing inquiry, claiming contractors used "bad faith" tactics to exploit deep-sea resources

164

Reposted by Javier Escartín

Dr JF Doussin @dr-jfdoussin.bsky.social · 18/12/2025

A strong statement from the Director of CNRS Earth and Space about the dismantling of the National Center for Atmospheric Research: "a pillar of atmospheric and climate research is being torn down" @cnrs-insu.bsky.social @cnrs.fr @ncar-ucar.bsky.social

0159

Reposted by Javier Escartín

Géosciences ENS @geosciences.bsky.social · 23/10/2025

👩‍🎓 Ouverture des candidatures PSL #PhD tracks 2026-27 en Sciences de la terre et biodiversité. Ces cursus en 5 ans s'adressent à des étudiants à haut potentiel souhaitant relever les défis scientifiques de demain et préparer, dès le niveau Master, leur projet de recherche. 👉 psl.eu/phd-track-ea...

111

Reposted by Javier Escartín

CNRS @cnrs.fr · 14/10/2025

#Communiqué 🗞️ Une hausse de la température des fluides émis par les sources hydrothermales sous-marines signale l’inflation de la chambre magmatique sous le fond marin et peut annoncer une éruption. 🌋 🌊 👉 www.cnrs.fr/fr/presse/le...

0258

Javier Escartín @jescartin.bsky.social · 12/10/2025

The School de PIs #2 "ECOLπ2" now sails from St John's, arriving at Brest 21st Oct. Onboard l'Atalante F. Lallier (Sorbonne U., Station Biol. Roscoff) & M. Delescluse (ENS de Paris) together w/ 5 young scientists, C. Prigent, M. Bickert, J. Tugend, S. Sambolian & M. Ourgaud, under sunny skies now.

141

Reposted by Javier Escartín

Meertext @meertext.bsky.social · 27/08/2025

#DeepSeaMining would cause severe impacts in all levels of large marine ecosystems - it`s devastating

0104

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.

1119

Javier Escartín @jescartin.bsky.social · 06/07/2025

🧪⚒️ #NODSSUM cruise - Operational update - North East Atlantic zones NEA#3&#4 of radioactive waste dump. UlyX mapped w/sonar 140 km2 (15 dives ), detecting more than 3000 barrels - 26 sites cored for sediment, 19 rosettes for water samples, 8 fishtraps (1 @ bottom, 9 rattails), 1 current meter.

083

Javier Escartín @jescartin.bsky.social · 06/07/2025

🧪⚒️ #NODSSUM cruise - Sunday w/ pains au chocolat - & 48 h till we leave the work site. Last night no UlyX dive due to weather & coring. The 12-tube Oktopus corer preserves the water - sediment interface, and a critical part to look for radionuclides from barrels or surface fall-out.

094

Javier Escartín @jescartin.bsky.social · 04/07/2025

🧪⚒️ #NODSSUM cruise - we are into the last week of the cruise. Up to now we have been spared of bad weather. We are now sandwiched in a narrow high pressure corridor w/ calm seas… ans spectacular sunsets & sunrises & moon rivers - but some rocking in the horizon this weekend.

092

Javier Escartín @jescartin.bsky.social · 30/06/2025

🧪⚒️ #NODSSUM cruise - Operational update - North East Atlantic zones NEA#3 and NEA#4 of radioactive dump. UlyX mapped w/sonar 110 km2 in 7 dives (1 to process ), detecting more than 1900 barrels, 9 sites cored 1 going (sediment), more than 10 rosettes (water samples), & 9 rattails w/fish traps

Map of operations - with the bathymetry (background with coloured relief and isobaths) and location of some of the dives - not up to date)

2137

Javier Escartín @jescartin.bsky.social · 30/06/2025

🧪⚒️ #NODSSUM cruise - on board now the teams are well seasoned and coordinated - operations run smoothly and efficiently all along- with sunshine and calm seas - finally - for the next few days… Update of cruise results/dives/samples to come shortly www.linkedin.com/posts/caroli...

linkedin.com

The #NODSSUM expedition is going well! | Caroline Gini

The #NODSSUM expedition is going well! ⛴️ Operations at sea are a complex ballet to ensure no time is wasted and all the scientific objectives are met by the end of the expedition 🔬📚⚒️ - First, ship...

040

Javier Escartín @jescartin.bsky.social · 28/06/2025

🧪⚒️ #NODSSUM cruise - WOW behind and WOW! Science day: Ulyx came back from a sonar survey at a site visited by AUV Epaulard in 1983 - >600 barrels more (>1800 to date) + a CTD/rosette during the dive, succesful sediment coring, and two fish traps recovered w/ 5 rattails (grenadiers).

1164

Javier Escartín @jescartin.bsky.social · 27/06/2025

🧪⚒️ #NODSSUM cruise - WOW - Wainting on Weather with a multibeam survey and no Ulyx dive yesterday- after 5 days of work at the radioactive waste dump site. After 5 Ulyx dives we now located >1200 barrels in sonar maps, and sediment/water/fish sampling is well on the way… more details later…

3266

Javier Escartín @jescartin.bsky.social · 22/06/2025

🧪⚒️ #NODSSUM cruise - we arrived to the radioactive waste dump site 2 days ago & AUV UlyX is brings up sonar data that will guide our sampling strategy. After checks for radioprotection, sonar data (500 Gb) transfer via the sturdiest hard drive ever - rated 6000m depth in a tinanium bottle.

0237

Javier Escartín @jescartin.bsky.social · 17/06/2025

🧪⚒️ #NODSSUM cruise - the first operations to test sampling of water and sediment, radioprotection protocoles, and the AUV w/ its new sonar are done. Soon off to a reference site w/ depths of more than 4800 m, before the work at the radioactive dump site.

Rosette for water sampling being checked for radioprotection

AUV Ulyx coming back from a test dive - including sonar

083

Javier Escartín @jescartin.bsky.social · 16/06/2025

🧪⚒️ #NODSSUM cruise - L’Atalante is now on the way after leaving Brest. First AUV UlyX dive tuesday morning to test all the instruments - and water and sediment sampling to set in place procedures and train the teams.

2154

Javier Escartín @jescartin.bsky.social · 14/06/2025

🧪⚒️ #NODSSUM cruise - the yellow UlyX - the autonomous underwater vehicle or AUV - is onboard this sunny Saturday morning - ready for deep diving & mapping the abyssal plains of the Atlantic. Back deck of l’Atalante now fully occupied also with moorings, corers, rosettes, etc. Almost ready to go.

0133

Javier Escartín @jescartin.bsky.social · 13/06/2025

🧪⚒️ #NODSSUM cruise - L’Atalante @ Brest harbor @ our arrival &some night pics. Empty but loading has begun & will be filled today w/ containers, instruments, the Ulyx autonomous robot, computers… Boarding Sun to set up labs & work spaces. Thanks to all making this possible #DT_INSU #FOF #GENAVIR

091

Javier Escartín @jescartin.bsky.social · 10/06/2025

🧪⚒️ #NODSSUM cruise - We bring along Marina Zindy’s art works, to be placed on ballast for moorings to be deployed in coming weeks. Permanently installed at the seafloor, we may visit them in a year or two during a follow up cruise. Read about Marina's project here: www.linkedin.com/posts/marina...

linkedin.com

#unoc3 #nodssum #unoc3 #nodssum | Marina Zindy

🚨 This week, the third United Nations Ocean Conference #UNOC3 is taking place in Nice. 🌊 To mark the occasion, I'd like to share with you my deep-sea project carried out with ENS Paris ! Here'...

041

Javier Escartín @jescartin.bsky.social · 07/06/2025

🧪⚒️ #NODSSUM cruise - Wind and waves are limiting factors for operations at sea - & thus to gather samples and data. While far ahead, but we begin to keep track of predictions in our working area (~46N 17W 😬) - working from the 20th of June, for about 20 days (check wave height at the flagpole).

050

Javier Escartín @jescartin.bsky.social · 04/06/2025

🧪⚒️ #NODSSUM cruise - J-10 and cruise preparations move along. Quizz - what is this shipment just received at Clermont Ferrand? Some clues: Not depth-rated 6000 m, ~5.5 kg in air and <0.5 kg in water. Not critical for any specific scientific operation.

071

Javier Escartín @jescartin.bsky.social · 28/05/2025

🧪⚒️ - PhD position APPLICATIONS OPEN TILL JULY 15th 2025 - based @ U. Lyon (M. Andreani) w/ the participation of ENS Paris - on fluid-rock interactions at ridges. This is part of the FLUXBEATS ITN project (www.fluxbeats.eu) involving 10 PhD programs. observatoire.univ-lyon1.fr/actualites/j...

fluxbeats.euinvolving

021

Javier Escartín @jescartin.bsky.social · 22/05/2025

🧪⚒️ #NODSSUM cruise - less than 4 weeks before departure, the hidden part of sea-going fieldwork: preparation of material... and skills. Logistics, shipping, administrative forms, purchases, instrument training w/ support from #DT_INSU. All has to be onboard when sailing.

At the #CNRS #DT_INSU facilities of the National Parc of Oceanographic Instrumentation (PNIO) - going over material gathered at Plouzane, for transfert to the ship. This includes CTD and Rosettes for water sampling, corers for sediments, and mooring material for current meters and fish traps. And training for the scientists by personnel from PNIO.

092

Javier Escartín @jescartin.bsky.social · 21/05/2025

🧪⚒️ #NODSSUM cruise, J-27: Onboard N/O L'Atalante, AUV UlyX first science deployment @ NE Atlantic Abyssal Plain to depths of 5500 m, to identify and map radioactive waste barrels @ the seafloor & impacts on ecosystems. CNRS press release (cruise webpage in link) www.cnrs.fr/fr/presse/de...

cnrs.fr

Déchets radioactifs : une mission scientifique part cartographier les fûts immergés de l’Atlantique

Entre 1950 et 1990, plus de 200 000 fûts remplis de déchets radioactifs ont été jetés dans les abysses de l’océan Atlantique Nord-Est.La première mission de la campagne NODSSUM, prévue du 15 juin au 1...

0147

Javier Escartín @jescartin.bsky.social · 08/05/2025

🧪⚒️ how well do we know the ocean floor? We now have the morphology for ~30% of the seafloor mapped by ships (seabed2030.org). What about visual observations? Dives with rovs, submersibles, towed sand other systems, have inspected <0.001%, about 1500 km2. At best. www.science.org/doi/10.1126/...

142

Reposted by Javier Escartín

Prof Ian Hall @ianhall.bsky.social · 03/05/2025

Current legal frameworks can’t protect the oceans from deep-sea mining and the negative impacts on humankind …then they need to be changed theconversation.com/current-lega...

theconversation.com

Current legal frameworks can’t protect the oceans from deep-sea mining and the negative impacts on humankind

Current regulations governing deep-sea mining are not enough to protect the ocean.

0164

Javier Escartín @jescartin.bsky.social · 02/05/2025

🧪⚒️ The New eruption @ the East Pacific Rise after a cycle of melt accumulation & seafloor uplift. Several years of follow up by Thibaut Barreyre (CNRS@GeoOcean) & coPIs will tell how these events build the oceanic crust, 1 eruption @ a time - & comeback of ecosystems www.nytimes.com/2025/05/02/s...

nytimes.com

Volcanic Eruption in Deep Ocean Ridge Is Witnessed by Scientists for First Time

Researchers diving in a submersible in the eastern Pacific realized that the landscape they had studied the day before had been glassed over by fresh lava.

273

Reposted by Javier Escartín

Deep Sea Conservation Coalition @deepseaconserve.bsky.social · 28/04/2025

Our Legal Advisor Duncan Currie also warns that the ramifications of this decision could resonate beyond deep-sea mining, affecting agreements on fishing, shipping, navigation and marine research! 📣 It’s time for governments to stand up-for people, for planet, for the ocean. #DefendTheDeep

0189

Javier Escartín @jescartin.bsky.social · 25/04/2025

This is just another step moving away from science-based approaches, and confirming the takeover by the incompetence and corruption of the Trump administration that is dismantling the US science network.

041

Javier Escartín @jescartin.bsky.social · 30/03/2025

TMC @themetalsco.bsky.social negotiating the shortcut around ISA with Trump - surely environmental aspects will be absolutely not taken into consideration. Surely no tariffs applied to this Canadian company. Greenwashing till now. www.theguardian.com/environment/...

theguardian.com

Canadian company in negotiations with Trump to mine seabed

Environmentalists call bid to skirt UN treaty ‘reckless’ amid fears that mining will cause irreversible loss of biodiversity

040

Javier Escartín @jescartin.bsky.social · 28/03/2025

Mining companies, after years pretending science-driven ‘sustainable’ deep-sea mining hope to team up with the Trump administration to circumvent mining regulations and put aside science. It was always about profits & never about the environment. Greenwashing it was. www.nytimes.com/2025/03/27/c...

nytimes.com

Mining Company Seeks Trump Support to Shortcut Access to Seabed Metals (Gift Article)

Mining companies and the Trump administration want the metals to boost manufacturing. Environmentalists and some countries worry industrial mining would harm oceans.

053

Reposted by Javier Escartín

Valérie Masson-Delmotte @valmasdel.bsky.social · 13/03/2025

Bonjour, Connaissez-vous le réseau de profileurs Argo? C'est une clé de voûte de l'observation de l'océan. www.argo-france.fr/Argo-France/... 1/...

Argo est un programme international qui coordonne la collecte des informations à l'intérieur de l'océan à l'aide d'une flotte d'instruments robotisés. Ces instruments, les flotteurs profileurs, dérivent avec les courants océaniques et se déplacent à la verticale entre la surface et 2000m, 4000m ou le fond des océans. Les données recueillies par Argo décrivent la température et la salinité de l'eau et certains flotteurs mesurent d'autres propriétés qui décrivent la biologie/chimie de l'océan.

Le réseau de flotteurs travaille en partenariat avec les satellites d'observation de la Terre, Jason, qui mesurent la forme de la surface de l'océan.

Chaque profileur Argo est mis à l'eau depuis un navire. Une fois dans l’eau, le flotteur descend pour se stabiliser vers 1km de profondeur. Dix jours plus tard, le flotteur descend jusqu'à 2, 4 ou 6km de profondeur, puis remonte à la surface. Lors de son ascension vers la surface, les capteurs embarqués s’activent et mesurent les propriétés de l'océan. Arrivé en surface, le flotteur transmet, via des satellites, les données et sa position à des stations de réception à terre. Le flotteur coule ensuite à nouveau pour répéter le cycle de 10 jours jusqu'à ce que ses batteries soient épuisées.

4292136

Javier Escartín @jescartin.bsky.social · 11/03/2025

🧪⚒️ - New Junior Professor (CPJ) position submarine volcanology at Saclay (FR). Applications opening spring 2025. Contacts: xavier.quidelleur@universite-paris-saclay.fr, anthony.hildenbrand@universite-paris-saclay.fr, alexandra.courin@universite-paris-saclay.fr.

011