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Olivier Sulpis

@sulpis.bsky.social
782 followers 893 following 23 posts

🌊 Researcher in marine chemistry and ecology at CNRS / @exoceanlab.bsky.social / ERC Deep-C PI / Marseille

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Reposted by Olivier Sulpis
exoCean Laboratory @exoceanlab.bsky.social · 24/12/2025
#exocean advent calendar day 24! Today we thought it was a good fit to show an image/talk about “conception”… One of the thing we (try to) do best at ExoCean is planktonic foraminifera reproduction. Here two immaculate mummies… 😏 We would like to wish you all a beautiful Christmas Eve!
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exoCean Laboratory @exoceanlab.bsky.social · 23/12/2025
#exoCeanadvent Day 23: at exoCean we also look at some old questions: in the late 1800s, during the HMS Challenger expedition, they discovered that you can have a constant rain of shells from above, and still end up with a seafloor that looks like the carbonate budget never existed. Why? Pressure. 🌊
HMS Challenger
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exoCean Laboratory @exoceanlab.bsky.social · 21/12/2025
#exocean advent calendar Day 21! The strongest link between all of us is our love for the ocean. Leaving Marseille with a magnificent sunrise reminds us each time we go out how lucky we are to do what we love for a living! We already have our ship time for the first 6 months of 2026 - exciting!
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exoCean Laboratory @exoceanlab.bsky.social · 20/12/2025
#exoCeanadvent Day 20: it's wishing time... Whether you believe in Santa (the French singer 🎤), FC, or as I recently heard, Professor Xmas... We can all hope for some things in the holiday season... At @exoceanlab.bsky.social we would like (in no particular order):
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exoCean Laboratory @exoceanlab.bsky.social · 19/12/2025
#exoCeanadvent Day 19: Friday edition: today’s post is about the peacocks at CEREGE, because it’s Friday and our brains are in weekend mode. They wander around like they own the campus, scream for no reason, and block paths with absolute confidence. Honestly, goals. 🦚
glorious peacock seducing CEREGE peopleplease feed mewe love peacocks so much they follow us in our offices
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exoCean Laboratory @exoceanlab.bsky.social · 18/12/2025
#exoCeanadvent Day 18: looking for a good read waiting for Santa? 🌊 Try marine carbon removal: @sulpis.bsky.social co-chaired the working group behind the @emarineboard.bsky.social MRV brief, because “trust me bro” isn’t a monitoring protocol. Emissions cuts first; then *maybe* carbon removal.
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exoCean Laboratory @exoceanlab.bsky.social · 17/12/2025
#exoCeanadvent Day 17: Net accident, happy outcome. Ex-lab member Laura caught this phronima (monster in a barrel) “by mistake”, so we adopted it - alive - in a lab aquarium. One haul turned into days of behaviour notes.
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exoCean Laboratory @exoceanlab.bsky.social · 15/12/2025
#exoCeanadvent Day 15: Some plankton are tiny [citation needed?], and for those we need ways to measure tiny (this is a theme you'll hear us talking about a lot). Sometimes just holding samples in place can be hard.... enter the #Cryostage! ❄️
A rack of tiny samples, about 0.5mm in diameter... Here we've custom made some really clean rings to hold them in place... next step, freeze!
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exoCean Laboratory @exoceanlab.bsky.social · 14/12/2025
#exoCeanadvent Day 14 Footprint reduction: we do lab-based ocean science because we genuinely love it, but also because lab experiments can replace lots of field trips. More control, more insight, and in part, fewer emissions. Bonus: dissolving old sediment cores neutralizes a bit of CO2. 😇
Sometimes you can replace a boat trip with a car trip, ever wondered how much ocean you can get into a Golf?
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exoCean Laboratory @exoceanlab.bsky.social · 13/12/2025
#exoCeanadvent Day 13: Time Machine. Travel back in time with us 6 million years. Part of the reason for our work @exoceanlab.bsky.social is to better understand the past through observing the modern, but sometimes you just need some ancient mud..@chalkyoceans.bsky.social recently went to get some!
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exoCean Laboratory @exoceanlab.bsky.social · 12/12/2025
#exoCeanadvent Day 12: End-of-year celebration - raclette edition. On the agenda for this team meeting: cheese, cheese, cheese, goals for next year: even more cheese. We’ve officially reached our melting point. 🧀
The exoCean team and friends actively brainstorming on hot topics Tiny raclette pan, big ambitions
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exoCean Laboratory @exoceanlab.bsky.social · 11/12/2025
#exoCeanadvent Day 11: Science makes you do strange things. Meet @astridhylen.bsky.social, a postdoc working with carbonate dissolution in coastal sediments. She recently found herself in the middle of a salt marsh, stirring one of the ponds with a (clean) toilet brush taped to a curtain rod.
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exoCean Laboratory @exoceanlab.bsky.social · 09/12/2025
#exoCeanadvent Day 9: Meet Maxime (again). At @exoceanlab.bsky.social and @climatecerege.bsky.social Maxime has been conducting several experiments focusing on the culture of marine organisms. One project involved culturing foraminifera in the presence of olivine (Mg,Fe)2SiO4, an igneous mineral.
Don't eat that! A large foraminifera trying to eat grains of olivine. It soon realised that they weren't food, but had no problems afterwards, so... not poison!
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exoCean Laboratory @exoceanlab.bsky.social · 08/12/2025
#exoCeanadvent Day 8: Meet Katoo Declerk's Erasmus+ work. During her internship Katoo is investigating recently dead foraminifera (handily available in our lab!) Forams typically sink to the ocean floor soon after death, but partial or total dissolution can occur before getting there.
A foram carefully lined up beneath the microscope, ready for investigation. 📷 K. Declerk
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exoCean Laboratory @exoceanlab.bsky.social · 07/12/2025
#exocean advent calendar Day 7! We are lucky to be based in a pine forest, in Southern France, which means loads of possible walks to discuss science in a wonderful environment. We also like to run together - as we did Friday to finish the week!
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exoCean Laboratory @exoceanlab.bsky.social · 06/12/2025
#exoCeanadvent Day 6: To study the deepest ocean trenches, we’re building reactors that make our lab behave like the deep ocean. Funded by @erc.europa.eu #Deep-C, they will hold cold seawater at ~1000 bar (10km water) so we* watch pressure shape chemistry and biology 🔬🌊 *mostly @sulpis.bsky.social
Schematic of the Deep-C high-pressure reactor and in situ sensors.
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Tom Chalk @chalkyoceans.bsky.social · 04/12/2025
#exoCeanadvent Day 4: At exoCean we also investigate what happens to calcifiers who mysteriously die (answer: a lot happens). For that we must go at sea and collect evidence, just like CSI but with more seasickness pills, same sunglasses.
Tom holding a surface interface core, like a proud father. The core includes the top layer of mud, with the bottom layer of ocean, including all the creatures living there (and more importantly for Tom, the ones long dead too). 

Disclaimer: Tom does not get seasick.
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Olivier Sulpis @sulpis.bsky.social · 03/12/2025
an illustration is required here, meet the real version of Jean-Milou, @exoceanlab.bsky.social only Canidae member.
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exoCean Laboratory @exoceanlab.bsky.social · 03/12/2025
#exoCeanadvent Day 3: An important part of creating a lab is to be able to plan things in miniature, for this we use #Lego versions of our team, they tend to be a bit cheaper for testing. You may spot some of @chalkyoceans.bsky.social's not so secret wishlist in the background (#nu-instruments).
The three PIs of #exoCean in Lego format. Olivier the steampunk moustache man, Julie smiling with her paintbrush (for picking forams) and Tom carrying some blue chemical (probably for his hair).
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exoCean Laboratory @exoceanlab.bsky.social · 02/12/2025
Day 2 of #exoCeanadvent: Come with us to sea (you can also be a land based participant). As an 'inland' ocean lab, we don't quite have the sea on our doorstep, but that doesn't mean we can't bring it to us! We're based just 30–60 minutes from boats out of Marseille and Toulon.
A plankton net (think large wind sock) hangs from the back of a boat. We use these to conduct surveys of the ecosystem and bring back live plankton to the lab.
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CNRS @cnrs.fr · 17/11/2025
Face à l’urgence climatique, les techniques d’élimination du CO₂ dissous dans l’océan suscitent espoirs autant qu’inquiétudes. Comment procéder ? Quelles règles se donner ? Qui doit décider ? Les éclairages du biogéochimiste Olivier Sulpis, chargé d’évaluer ces méthodes.
lejournal.cnrs.fr
Réchauffement : peut-on réduire le CO2 océanique ?
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James Bradley @drbradbrad.bsky.social · 21/10/2025
Postdoc vacancy: Microbial dormancy in the cryosphere @erc.europa.eu #ERC_SIESTA 📢 PLEASE RT 🧬 Single cell microbial activity measurements, flow cytometry, cell sorting, omics, ecological interpretation ☀️ Marseille, France ‼️ Apply ASAP & before 7 Nov Link: emploi.cnrs.fr/Offres/CDD/U...
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Olivier Sulpis @sulpis.bsky.social · 14/10/2025
Master's internship (6 months) — Mangrove–ocean oxygen dynamics in Senegal 📍 CEREGE (Aix-en-Provence) | 🗓 Start Jan–Mar 2026 | ⏳ Apply by 31 Oct 2025 See flyer: nuage.osupytheas.fr/s/ZGcJtgN6Sm...
nuage.osupytheas.fr
Sujet de M2_MANGO2026.pdf
Nuage - le Nuage de l'OSU Pytheas
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Olivier Sulpis @sulpis.bsky.social · 02/10/2025
Reminder - the exoCean lab is hiring
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exoCean Laboratory @exoceanlab.bsky.social · 02/10/2025
The lab keeps evolving and we are THRILLED! More equipment is about to arrive, some more is planned, and we feel super excited about our different projects. Also really… what a view when the doors are open, one can even see the emblematic « sainte victoire » behind the trees!
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Olivier Sulpis @sulpis.bsky.social · 29/09/2025
🌟 Postdoc Opportunity in Marine Biogeochemistry at CNRS-CEREGE! 🚢 Are you a passionate researcher ready to tackle climate change? Dive into the ERC-funded Deep-C project in Aix-en-Provence, France! ⬇️
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James Bradley @drbradbrad.bsky.social · 10/09/2025
2 Postdoc vacancies: Microbial dormancy in the cryosphere @erc.europa.eu #ERC_SIESTA 📢 PLEASE RT Experimental: 🧬 Single cell microbial activity measurements, flow cytometry, omics, biogeochem Modelling: 🖥️ Bioenergetics, thermodynamics, ecological, biogeochem ☀️ Marseille, France ‼️ Apply by 30 Sept
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Louise Delaigue @ldelaigue.bsky.social · 05/08/2025
📝 New preprint out! We investigated how the marine biological carbon pump is spatially redistributing carbon, even as its global strength stays constant. ➡️ Shifting remineralization patterns 🌊 Implications for carbon storage under climate change Read here: doi.org/10.21203/rs....
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Olivier Sulpis @sulpis.bsky.social · 08/07/2025
Tout aussi impressionnant vu de dessous!
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CEREGE @cerege.bsky.social · 23/06/2025
🏅 Congratulations to Isabelle Basile-Doelsch, Research Director at INRAE/CEREGE, for winning an @erc.europa.eu Advanced Grant for her NanoCLICS project. Learn more about her project: www.cerege.fr/en/nanoclick...
cerege.fr
NanoCLICS: A New Approach to Understanding Carbon Dynamics in Soils - CEREGE
Isabelle Basile-Doelsch, Director of Research at INRAE and based at CEREGE, has been working for several years on the dynamics of carbon in soils, an area of particular concern for the environment.
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AC Vasquez - 安娜 @criskotsu.bsky.social · 21/05/2025
This study hypothesized that rapid organic carbon deposition and active microbial respiration in the deep ocean environment may promote the occurrence of intense #SilicateWeathering, and proposed a conceptual model of carbon-silica coupling cycle in the #Deep-sea 🌊🧪🪨
pubs.geoscienceworld.org
Rapid burial and intense degradation of organic matter drive active silicate weathering in the subsurface sediments of the ocean’s deepest realm | Geology | GeoScienceWorld
Hadal trenches (>6000 m water depth) have been revealed as hotspots of organic carbon burial and microbial respiration in the ultradeep ocean
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Louise Delaigue @ldelaigue.bsky.social · 08/05/2025
This week, I gave a TEDx talk on listening to the ocean’s climate clues. A few days later, I found myself underwater doing exactly that—though not quite how I expected. We captured a fin whale call on a GoPro while diving near Nice. Estimated ~5 km away. Wild. #OceanScience #UNOC2025
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exoCean Laboratory @exoceanlab.bsky.social · 07/05/2025
ExoCean is in #Bermuda! Or at least most of it is (sorry @sulpis.bsky.social). We're here looking for foraminifera to grow in the lab, and sediments to observe how they will react to ocean change.
The boat Henry Stommel getting ready for a plankton tow at the BIOS dock.
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olivierpourret.bsky.social @olivierpourret.bsky.social · 07/05/2025
🌟 Exciting News for the Geochemistry Community! 🌟 We are thrilled to announce the launch of a new diamond open access journal: Advances in Geochemistry and Cosmochemistry (AGC)! @weareagc.bsky.social doi.org/10.33063/agc...
doi.org
Equitable Access, Open Science, and the Future of Publishing in Geochemistry and Cosmochemistry | Advances in Geochemistry and Cosmochemistry
Crawford, W. (2024). Diamond OA: The World of No-Fee Open Access Journals (p. 265). Livermore, CA: Cites & Insights Books.
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Olivier Sulpis @sulpis.bsky.social · 06/05/2025
Our brand new lab of experimental ocean sciences now has its own Bluesky account! Follow to know what we, our colleagues and students are up to ⬇️🌊
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Alexis Licht @alexislicht.bsky.social · 07/03/2025
Dear US colleagues, In response to the Trump administration, my university @univ-amu.fr is setting up a new program dedicated to welcoming American scientists wishing to pursue their work in France. There are several M$ in the budget. www.univ-amu.fr/en/public/ac...
univ-amu.fr
Safe Place For Science: Aix Marseille Université ready to welcome American scientists | Aix Marseille Université
In a context where some scientists in the United States may feel threatened or hindered in their research, our university is announcing the launch of the Safe Place For Science program, dedicated to w...
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Olivier Sulpis @sulpis.bsky.social · 26/02/2025
🚨Postdoc Offer🚨 Fully funded 2-year research position at Paris or Aix-en-Provence: your choice! The project aims to predict OAE feedbacks and environmental impacts in the ocean interior, in particular at the seabed. See job ad : nuage.osupytheas.fr/s/4zMfHFZ8S2... Please share widely! ⚛️
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Association for the Sciences of Limnology and Oceanography @aslo.org · 24/02/2025
Save the date! The Ocean Sciences Meeting is coming to Glasgow, Scotland, 22-27 Feb 2026—the first OSM outside the US! 🌍 Join scientists, students, journalists, & more to grow our global ocean community, foster partnerships & build a sustainable future. #OSM26 @agu.org @tosoceanography.bsky.social
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Olivier Sulpis @sulpis.bsky.social · 24/01/2025
Come work with us at CEREGE, in Provence, for a position at the intersection of science, communication and management!
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Alexis Licht @alexislicht.bsky.social · 23/01/2025
@sulpis.bsky.social, @chalkyoceans.bsky.social and I are hiring a project officer and communication manager to handle the communication of our ERC projects and help us with the French administrative procedures at @cerege.bsky.social. You can find the job offer here: emploi.cnrs.fr/Offres/CDD/U...
emploi.cnrs.fr
Portail Emploi CNRS - Offre d'emploi - H/F Manager de projets europeens : Coordinateur de projet et chargé de communication
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Dr. Or M. Bialik |📚|🔬|🌊|⚒️ @obialik.bsky.social · 06/01/2025
The thing about early alteration of grains in the sediment, is that there are a lot of things living there. So, while chemistry is what's working on the fundamental level, (micro)biology is a critical mediating factor. 🧪⚒️ www.nature.com/articles/s41...
Schematic representing the three modes of alteration observed in the sediment grains when exposed to bacteria (V. marismortui and H. meridiana) for an extended period. Arrow going from left (start) to right) showing precipitation of mineral envelopes with higher Mg/Ca ratio and lower d13C value.
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Peter Crockford @earth2pete.bsky.social · 19/12/2024
Marine Zn limitation is a thing bg.copernicus.org/articles/21/...
bg.copernicus.org
High metabolic zinc demand within native Amundsen and Ross sea phytoplankton communities determined by stable isotope uptake rate measurements
Abstract. Zinc (Zn) is an essential micronutrient for most eukaryotic phytoplankton. Zn uptake by phytoplankton within the euphotic zone results in nutrient-like dissolved Zn (dZn) profiles with a lar...
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Sonia Chaabane @soniachaabane.bsky.social · 18/12/2024
🌟 Thrilled to celebrate @lucbeaufort.bsky.social, senior researcher at CNRS @cerege.bsky.social @climatecerege.bsky.social, for receiving a prestigious medal at the 2024 AGU Honors Ceremony! 🏅 📽️ Watch the ceremony in the thread below ⬇️
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Olivier Sulpis @sulpis.bsky.social · 12/12/2024
Eye-opening new paper by Fiorella Prada et al., describing proteins involved in "active Ca2+ trafficking": Proteomic characterization of a foraminiferal test’s organic matrix 🐚 With implications about paleoproxies and foram response to climate change... www.pnas.org/doi/abs/10.1...
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Nicolas Mouquet @nmouquet.bsky.social · 10/12/2024
Our fifth online CESABINAR will take place on Thurs Dec 12th, 3pm, Paris time @soniachaabane.bsky.social and @tdegaridel.bsky.social, from @cerege.bsky.social, will present the work of the #CESAB FORCIS group : Foraminifera Response to Climatic Stress zoom : bit.ly/49CsXdW key: 941365 🧪🌐🌍🦑
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Andrew Dessler @andrewdessler.com · 02/12/2024
On The Climate Brink: Stop emissions, stop warming: A climate reality check This is a crucial point because it determines how much warming is already "locked in" and effectively unavoidable. The answer is very little warming is locked in. Also, this is our 100th post! www.theclimatebrink....
theclimatebrink.com
Stop emissions, stop warming: A climate reality check
Why future warming isn't as "locked in" as you might think
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Franciska de Vries 🟥 @frantecol.bsky.social · 28/11/2024
Science takes time - a lot of time. Time that is more and more difficult to make available because of increased workloads. Time that exceeds the temporary contracts of postdocs and PhDs. I'll illustrate this using our paper published in Nature yesterday. 🧵 (1/x) www.nature.com/articles/s41...
nature.com
Soil microbiomes show consistent and predictable responses to extreme events - Nature
Soils from 30 grasslands across Europe were subjected to 4 contrasting extreme climatic events under drought, flood, freezing and heat conditions, with the results suggesting that soil microbiomes fro...
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Nicolas Mouquet @nmouquet.bsky.social · 26/11/2024
Reef fishes most threatened by extinction (worldwide) receive less scientific and public attention! see our publication in Science Advances : www.science.org/doi/10.1126/... Let’s (re)balance our focus to protect all marine life !! and beyond ... 🧪🌍🦤🦑🌐
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Olivier Sulpis @sulpis.bsky.social · 13/11/2024
🌊 New study led by @soniachaabane.bsky.social shows how planktonic Foraminifera have entered the Anthropocene. 🐚 Also featured in The Post: www.washingtonpost.com/climate-envi...
washingtonpost.com
Plankton are the backbone of the ocean — and may struggle with what’s coming
A pair of papers in the journal Nature shows how plankton are struggling to survive in warming seas.
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Sonia Chaabane @soniachaabane.bsky.social · 13/11/2024
🌊📉 New Paper Alert! "Migrating is Not Enough for Modern Planktonic Foraminifera in a Changing Ocean" published Open Access in Nature🧵👇 Me & @tdegaridel.bsky.social @juliemeilland.bsky.social @sulpis.bsky.social @chalkyoceans.bsky.social and others www.nature.com/articles/s41...
nature.com
Migrating is not enough for modern planktonic foraminifera in a changing ocean - Nature
Low-latitude planktonic foraminifera are coping with rapid ocean warming, acidification and nutrient shifts by migrating to deeper water-column depths or polewards, displacing higher-latitude species ...
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