#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!

#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. 🌊

More politicians, policymakers, and companies should be on Bluesky.

#exoCeanadvent Day 22: Winding down for the holidays often means one thing... more mass spectrometry time is available! With our friends in @cerege.bsky.social's #ENVITOP facility, we're making use! Thanks to their equipment we're working on measuring elemental compositions down to the nano-gramme!

#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!

Here's to #2026! Please don't hold us to any of these...

12 scientific papers 💻, 11 months of good weather 🌞, 10⁴ foram babies 🐚, 9 visiting scientists 👩🏼‍🔬👨🏾‍🔬, 8 successful boat missions 🛥️, 7 website visits 🙏🏼, 6 new hypotheses 💡...*5 gold rings*...4 defended masters 📜, 3 #ForCry mass spec methods 🔍, 2 #Deep-C reactors 🧿...

#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. 🦚

Essential reading for those interested in going carbon negative 👀. See what @sulpis.bsky.social does for a living and how it connects to @exoceanlab.bsky.social here!

Read the European Marine Board report here: 📘👀 www.marineboard.eu/publications...

Net accident you say? Ooops, this net came back looking like it had been mauled by a shark, and I think... Maybe it had. A good, but expensive(!) sample. Sorry @tdegaridel.bsky.social!

#exoCeanadvent Day 16: We're getting closer to the holidays, but we don't stop yet. @erc.europa.eu postdoc @jysuarezibarra.bsky.social was out today presenting his work @maxplanck.de in Mainz. @soniachaabane.bsky.social is also visiting to chat with colleagues.

#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! ❄️

#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. 😇

#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 [email protected] recently went to get some!

#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. 🧀

#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.

There's still much more to come from our trip to Bermuda with @juliemeilland.bsky.social, @thefosterlab.bsky.social and @case4climate.bsky.social. Whilst there, we were all tortured with video interviews... Here's a taster!

100% recommend for fieldwork. See @maxime-felix.bsky.social for details on availability.

#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.

One of many super cool projects started or starting in @exoceanlab.bsky.social. Keep it up Katoo!

#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

#exoCeanadvent Day 4: Why did we set up this lab? Part I. What is going to happen to climate as CO2 levels go up? @chalkyoceans.bsky.social and @erc.europa.eu project #ForCry look at CO2 in the past to better understand climate sensitivity. Part of this is making better past CO2 reconstructions.

Find this data, and more - in the fantastic paper by Elwyn de la Vega. Boron isotope CO2 reconstructions in the Pleistocene have come a long way... but we still have more to come. Watch this space with @mudwaterclimate.bsky.social and many others! cp.copernicus.org/articles/19/...

It might have been 10 years @whoi.edu, but I still wear your hoodie at sea. Thanks for helping me know what to do when I'm there.

#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.

For reference this is @juliemeilland.bsky.social's exact face every time she gets to play with living foraminifera. #foramwizard.

Feel so lucky to be a part of this team. It is a geochemist's dream to have foraminifera growing right on site. 🐚🌡️⚡🔬

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.

Welcome to the exoCean advent calendar! To get us through the wintery month of December we'll be telling you one thing about our lab everyday this month. (Until the 24th). Stay tuned! Today we unveil our new lab #logo and #website, it's a new era for #exoCean! exocean.academicwebsite.com

So excited to see how this revolutionises foraminifera work. Well done and deserved @juliemeilland.bsky.social, but not sure I can ever forgive you for getting me into the "living stuff" !!

This is cool, 6 million year old ice from Antartica with inferred temperature ~12°C warmer than the late Pleistocene. No CO2 level yet! (That will be highly anticipated!) www.pnas.org/doi/10.1073/...

Just realised that this is as close to an "M2-M2" project as you are likely to get. Explore the aftermath of one of the most interesting features of the Pliocene, MIS M2 during your M2 internship! www.sciencedirect.com/science/arti...

Are you looking for a master's internship (5-6 months)? Constraining tropical planktonic foraminifera depth habitats in a (past) high-CO2 world 🥵🌎 Come to @climatecerege.bsky.social, south of France☀️🇫🇷 Deadline: 15 Nov 2025. Start: Jan-Mar 2026. More info👇 nuage.osupytheas.fr/s/fdAEGQXkwA...

Wonder what carbon was doing in the oceans before humans were around to see? We'll use the chemistry of tiny shells on the seafloor to find out how carbon moved between the ocean and atmosphere over 1 million years ago. Come work with us in 2026 for your M2 internship @climatecerege.bsky.social.

Interested in improving our knowledge of climate by looking into the past? In the Pliocene the earth was hotter than today, but carbon dioxide was "about the same". Come work with us in 2026 looking at where this crucial information comes from, and how to make it better during an M2 internship.

New paper(s) alert! Check out @agu.org Palaeoceanography & Paleoclimate. Including our piece on best practices going forward for d11B-CO2 reconstructions. agupubs.onlinelibrary.wiley.com/doi/10.1029/... including @case4climate.bsky.social, @michaelhenehan.bsky.social,... @eleniwater.bsky.social.

Reminder - the exoCean lab is hiring

Still time to apply:

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!

Slowly but surely the lab we had in our heads with @sulpis.bsky.social and @chalkyoceans.bsky.social is coming to life. High pressure incubators are about to come, more microscopy equipments… Such a nice adventure has started!

#Lecturer position in #EarthSciences 👇🏼@openuniversity.bsky.social Please apply, if interested 🙏🏼 Closing Date: 20 October 2025 Contract Type: #Permanent Fixed Term Contract/End Date: Not Applicable jobs.open.ac.uk/job/Lecturer...

Come work in our lab! All the usual awesome things apply about doing exciting science, plus this one might save the world! @sulpis.bsky.social hiring a 2 year position to observe and model deep ocean processes using high-pressure reactors. *Goes to gather a bunch of forams to be dissolved* 😅

Sediments dissolving on the seafloor can act as a long term sink for carbon dioxide emissions. We're bringing it to the lab, deep sea research from the comfort of Southern France! Postdoctoral position for 2 years available working with @sulpis.bsky.social in the @exoceanlab.bsky.social.

Nice comparison of foram-coating derived and sediment derived #Ndisotopes in the Mediterranean from Kazuyo Tachikawa and others @climatecerege.bsky.social and @cerege.bsky.social. Small cautionary tale for unrestricted use (of sediment), but normally it works! www.sciencedirect.com/science/arti...

👏🏼

Watch this space for so much new exciting science from the new influx of Ceregiens. @cerege.bsky.social

Day 4, #ICP15, next up @antacl.bsky.social talking about long term evolution of South Asian Summer Monsoon. Congratulations to @antacl.bsky.social for starting her new position soon 🥳 @climatecerege.bsky.social @cerege.bsky.social

Future (and past) @climatecerege.bsky.social superstar @antacl.bsky.social giving her #ICP15 talk now. Modelling the Indian monsoon in the Miocene, and some important praise to the organisers for their diverse programme of speakers. Bravo!

This week, I am grateful to be at the International Conference on Paleoceanography #ICP15. Great start this morning with a tour of #Boron isotopes & #Cenozoic CO₂ reconstructions from @eleniwater.bsky.social & @chalkyoceans.bsky.social. Nice to see all the paleoceanographers in #Bengaluru!