🌊 𝗙𝗶𝗳𝘁𝘆 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗼𝗰𝗲𝗮𝗻 𝗰𝗵𝗲𝗺𝗶𝘀𝘁𝗿𝘆 𝗶𝗻 𝗼𝗻𝗲 𝗽𝗹𝗮𝗰𝗲: 𝗚𝗟𝗢𝗗𝗔𝗣𝘃𝟯 One seawater sample captures one place, one depth and one moment. Combined with millions of others it can help reveal how the ocean is changing. This blog post introduces GLODAPv3 and the work behind this global synthesis 👉 bit.ly/3Rj4K7K

Fifty years of ocean chemistry in one place: GLODAPv3 is here!

Working with marine carbonate-system observations has taught me how much effort lies behind every row of an oceanographic dataset: long hours at sea, careful sampling, laboratory analyses, calibration...

bit.ly

🚨 The latest Global Carbon Budget 2025 is officially out: doi.org/10.5194/essd... I’m excited to share three major updates particularly relevant to the 🌊 carbon community:

Global Carbon Budget 2025

Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere in a changing climate is critical to bette...

doi.org

Why do climate models disagree so much in forecasting ocean net primary production under different emissions scenarios? Check out this new paper by @natlegrix.bsky.social and I 🌊 agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Sources of Uncertainty in Ocean Net Primary Productivity Projections Under Climate Change

Disagreement on the preindustrial state of net primary productivity (NPP) dominates the uncertainty in absolute rates of NPP Earth system models project divergent long-term shifts in the decadal ...

agupubs.onlinelibrary.wiley.com

OffsetsDB just got bigger. Today, we added two new offset registries — Isometric and Cercarbono — to our open database that standardizes information about offset projects and their credits. Now researchers can access data from seven registries, which cover the vast majority of the carbon market.

Welcoming Isometric and Cercarbono to OffsetsDB – CarbonPlan

We’ve added two new offset registries to OffsetsDB.

carbonplan.org

📢 Job Alert; open-ended post!! We are seeking an observational oceanographer, with a keen interest in instrumentation and fieldwork in the polar regions. Please share and help connect us with the right candidate! fa-evzn-saasfaukgovprod1.fa.ocs.oraclecloud.com/hcmUI/Candid...

Observational Oceanographer

British Antarctic Survey | Open-Ended Appointment | Cambridge |

fa-evzn-saasfaukgovprod1.fa.ocs.oraclecloud.com

A sad day. Jorge Sarmiento, one of the greats in ocean science, passed away today. Jorge was a model leader; thoughtful, compassionate, and an excellent scientist. His leadership of @soccomproject.bsky.social transformed @bgc-argo.bsky.social into a global system.

🌊 This summer, I’m co-organizing a OAE model skill assessment workshop. We’ll spend 5 days in an amazing location in southern Germany, together with ~30 hand-picked experts. A few seats are open for applications. Just share a brief note on why you’d like to join: www.carbontosea.org/2026/04/13/o...

Apply now for the OAE Model Skill Assessment Workshop - Carbon to Sea Initiative

The Carbon to Sea Initiative, with guidance and support from a steering committee, will be hosting a workshop from June 29-July 4 to develop guidelines for biogeochemical model skill assessment, align...

carbontosea.org

So... now we can breathe again. Let's talk about ScenarioMIP. The final version is now up on GMD - and there's some changes since the first draft. /THREAD/ gmd.copernicus.org/articles/19/...

The Scenario Model Intercomparison Project for CMIP7 (ScenarioMIP-CMIP7)

Abstract. Scenarios serve as a critical tool in climate change analysis, enabling the exploration of future evolution of the climate system, climate impacts, and the human system (including mitigation...

gmd.copernicus.org

If you’re at #OSM26 in Glasgow, I’ve just signed lots of copies of Blue Machine that are now on sale in the shop at @glasgowscience.bsky.social 🌊🌊 Share the ocean love!

Extremely insightful and complex study on ocean alkalinity enhancement under different future emission scenario. Congratulations to @jhauck.bsky.social and team. This is a great primer for many of the things we plan to elaborate further in #OAEMIP.

Judith Hauck@jhauck.bsky.social · 7mo ago

🌊 New ocean alkalinity enhancement paper out, led by @tanvi05.bsky.social: We conducted global and regional (subduction regions) alkalinity enhancement simulations in the emission-driven AWI-ESM. Key findings are ... shorturl.at/9Cz5r @miriamseif.bsky.social @awi.de @cdrmare.bsky.social 1/x

🌊 New paper out assessing the potential of Ocean Alkalinity Enhancement (OAE) to mitigate the impacts of ocean acidification on marine calcifiers doi.org/10.1021/acs....

Substantial Limitations of Ocean Alkalinity Enhancement in Mitigating the Negative Impacts of Ocean Acidification on Marine Calcifiers

Ocean Alkalinity Enhancement (OAE) is increasingly considered as a marine carbon dioxide removal (mCDR) strategy with the potential cobenefit of mitigating ocean acidification (OA), but this remains p...

doi.org

🌊

Jens Daniel Müller@jens-d-mueller.bsky.social · 8mo ago

Want to understand how the world’s first carbon credits for ocean alkalinity enhancement were issued? Anna Madlener — one of the new colleagues I’m extremely excited to work with at the Carbon to Sea Initiative — has you covered: www.carbontosea.org/2025/11/25/a...

Want to understand how the world’s first carbon credits for ocean alkalinity enhancement were issued? Anna Madlener — one of the new colleagues I’m extremely excited to work with at the Carbon to Sea Initiative — has you covered: www.carbontosea.org/2025/11/25/a...

The First OAE Credits: An Independent MRV Review - Carbon to Sea Initiative

Carbon to Sea’s MRV Blog Series: This is the second installment in Carbon to Sea’s monitoring, reporting, and verification (MRV) blog series. I’m Anna Madlener, Senior Manager for MRV at Carbon to Sea...

carbontosea.org

🚨 The Global Carbon Budget 2025 has just been released and I actively contributed for the first time 😍

Glen Peters@glenpeters.bsky.social · 9mo ago

📢Global Carbon Budget 2025📢 Fossil CO2 emissions continue to rise in 2025 while the terrestrial carbon sink recovers to pre-El Niño strength. The key findings are covered in two reports this year: * ESSDD (preprint): essd.copernicus.org/preprints/es... * Nature: www.nature.com/articles/s41... 1/

Future atmospheric and ocean warming over the 21st century might be larger than previously expected based on a new study by @linusvogt.bsky.social Linus & I developed the idea during Linus research visit with me at @whoi.edu and turned it then into this paper: esd.copernicus.org/articles/16/...

Increased future ocean heat uptake constrained by Antarctic sea ice extent

Abstract. The ocean takes up over 90 % of the excess heat stored in the Earth system as a result of anthropogenic climate change, which has led to sea level rise and an intensification of marine extre...

esd.copernicus.org

Call for #abstracts – Ocean Sciences Meeting 2026 🌊 📅 February 22–27, 2026 📍 Glasgow, Scotland We are excited to announce our #OSM26 session: CC019 – Ocean uptake, transport, and storage of heat and carbon Details and submission: agu.confex.com/agu/osm26/pr... See you in Glasgow! ✨️

A study in Nature Climate Change shows that the ocean carbon sink unexpectedly declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics. 🌊 🧪

Unexpected decline in the ocean carbon sink under record-high sea surface temperatures in 2023 - Nature Climate Change

The ocean carbon sink strengthened in previous warm El Niño years due to reduced CO2 outgassing in the tropics. Here the authors show that the ocean carbon sink declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics.

go.nature.com

History made for the ocean: #BBNJ Agreement enters into force, protecting high seas & deep seabed, safeguarding life under water. “Our ocean is the foundation of our very existence. Today we took an important step forward to save our ocean, & to save our future” - ED @ingerandersen.bsky.social

1/n This study led by @aaronferderer.bsky.social tested how 5 diatom species respond to broad ranges of seawater carbonate conditions. Goal was to determine carbonate chemistry niches and to inform Ocean Alkalinity Enhancement (OAE) and Ocean Acidification (OA) 🌊 www.science.org/doi/10.1126/...

Carbonate chemistry fitness landscapes inform diatom resilience to future perturbations

Diatom growth rates are determined by concentrations of CO2 and H+ across broad carbonate chemistry landscapes.

science.org

🌊 Very exciting opportunity in ocean physics!

Galen McKinley@oceancarbon.bsky.social · 11mo ago

In the Department of Earth and Environmental Sciences @columbiauniversity.bsky.social, we are hiring an Assistant Professor in Atmosphere and/or Ocean Physics. No deadline stated, but review will begin soon, so please do not delay. apply.interfolio.com/173819

🚀 Exciting next step: I’ll soon start as a Research Fellow at Carbon to Sea! 🌊

Round 1 of the second science seminar for #AntarcticaInSync - an international collaboration aiming at advancing research of all kinds in Antarctica + the Southern Ocean. Fear not if you missed it, there is another chance Wednesday at 15:00 UTC www.antarctica-insync.org/2nd-antarcti...

2nd Antarctica InSync International Science Webinar - event - Antarctica Insync

Join us for a dynamic online workshop to advance the scientific planning of Antarctica InSync, an international initiative endorsed by the UN Ocean Decade. Aiming for a circumpolar assessment of Antarctica and the Southern Ocean, the initiative explores the links ... Read more

antarctica-insync.org

Every measurement matters 👏👇

Judith Hauck@jhauck.bsky.social · 11mo ago

So nice to see #Polarstern pCO₂ data from the @awi.de MOSAiC expedition being used to provide better quantifications of Arctic Ocean CO₂ uptake. 🌊 agupubs.onlinelibrary.wiley.com/doi/10.1029/...

news.climate.columbia.edu/2025/09/04/t... We've had a new analysis published on the impact on the ocean carbon sink from the unprecedented ocean warming of 2023.

The Ocean Carbon Sink Is Ailing

Measurements analyzed by an international research team indicate the global ocean absorbed significantly less CO₂ than anticipated during the unprecedented marine heatwave in 2023.

news.climate.columbia.edu

Great news study of the global ocean carbon sink response to the 2023 warming conditions

Jens Daniel Müller@jens-d-mueller.bsky.social · 11mo ago

🌊 In 2023, the ocean carbon sink weakened for the first time in a record-hot year 🌡️🌎 Our new study in Nature Climate Change quantifies this unexpected decline and explains how it came about. 👇 doi.org/10.1038/s415...

🌊 In 2023, the ocean carbon sink weakened for the first time in a record-hot year 🌡️🌎 Our new study in Nature Climate Change quantifies this unexpected decline and explains how it came about. 👇 doi.org/10.1038/s415...

Unexpected decline in the ocean carbon sink under record-high sea surface temperatures in 2023 - Nature Climate Change

The ocean carbon sink strengthened in previous warm El Niño years due to reduced CO2 outgassing in the tropics. Here the authors show that the ocean carbon sink declined in 2023 despite record-high se...

doi.org

🌊With the Fall semester upon us, it's time to start thinking about recruiting/applying to grad school for 2026. If you are a marine scientist looking for a graduate student, I've created a form where you can add your name and other info: docs.google.com/forms/d/e/1F... Please share widely! (1/2)

Oceanography MS/PhD Positions for Fall 2026

This is an effort to collect the **contact information of potential advisors** for MS/PhD students in Oceanography. Please note that if you answer **you are agreeing to have your contact information...

docs.google.com

Crazy how time flies: Five years of being a Postdoc, and now already five months since not being a Postdoc anymore in the fabulous @upgroup.bsky.social at @usyseth.bsky.social.

UPgroup@upgroup.bsky.social · last yr.

Big smiles, high ropes, and a great send-off! We celebrated @jens-d-mueller.bsky.social's time in our group with a day in the treetops at Seilpark. 🌲💪 #MarineScientistsGoHigh #Farewell #TeamOuting

… a few more days to submit your abstract to this wonderful session 🙃 on mCDR 😉 at OSM26 🌊 Biogeochemical and Ecological Insights for Evaluation of Marine Carbon Dioxide Removal (mCDR) agu.confex.com/agu/osm26/pr...

Giulia Faucher@giuliafaucher.bsky.social · last yr.

🌊 If you plan to attend OSM26, please consider submitting an abstract to our session “Biogeochemical and Ecological Insights for Evaluation of Marine Carbon Dioxide Removal (mCDR)” agu.confex.com/agu/osm26/pr... OSM: 22-27 February 2026 Glasgow Abstract submission deadline: 20th August 2025

🌊 Journalists: the ocean needs your voice. Apply now to the @pulitzercenter Ocean Reporting Network & spend a year investigating the ocean stories that can change our planet’s future. e.g. deep-sea mining, marine energy, CO2 removal or polar issues pulitzercenter.org/blog/journal...

Journalism That Goes Deep: Applications Open for Ocean Reporting Fellowships

Image Applications are now open to join the third cohort of the Ocean Reporting Network (ORN), a fellowship program that gives professional journalists the opportunity to spend up to a year working on...

pulitzercenter.org