JGR: Oceans

How the Rise of a Salty Blob Led to the Fall of the Last Ice Age - Eos Scientists have long suspected that high salinity levels in the deep ocean were responsible for keeping carbon dioxide locked away during the last ice age. New research finds the strongest evidence…

It’s salty. It’s full of carbon. Its upwelling may have helped end the last ice age. It’s…the salty blob!

eos.org/articles/how...

View more in our March special collection: eos.org/themes/ionic...

Bacteria Decide the Ocean’s Dissolved Organic Carbon Abundance - Eos Dissolved organic carbon prevalence follows from how many bacteria are around to eat it, modeling suggests.

It’s not what you have, it’s how you use it—even when it comes to the distribution of dissolved organic carbon in the ocean. The type of DOC is less important than how many bacteria are around to eat it, modeling suggests.

eos.org/research-spo...

The U.S.'s decision to withdraw from global climate and environmental organizations and treaties will have ramifications far beyond the current administration.

Add your name to our @aguscipolicy.bsky.social letter supporting global climate science: buff.ly/RURRhnt

In collaboration with @aslo.org , @tosoceanography.bsky.social, we thank you for a successful #OSM26!

See you at #OSM28 27 February–3 March, Vancouver, Canada 🇨🇦!

📷 Cred: Bianca Otero

We were honored to welcome Her Royal Highness The Princess Royal to the Ocean Sciences Meeting on Wednesday 25 February 2026 at the Scottish Event Campus, Glasgow.

#OSM26

Are you at #OSM26? So are the JGR-Oceans editors! Catch us at the publishing workshop tomorrow or at the editor rapid reviews on Thursday.

Rapid Reviews with AGU Editors at OSM26 Thursday 26 Feb at 12:00-14:00 GMT in the Career Centre

🌊Sign up to discuss your work with an AGU journal editor at #OSM26!

📚In a 15-minute session, get tailored advice on publishing and choosing the best journal for your research. Bring your abstract, poster, or elevator pitch and join us in the Career Center.

➡️ lite.spr.ly/6001PTtc

New in JGR: Oceans: Submesoscale Stirring Drives Lateral Dispersion and Vertical Exchange in a Cyclonic Mesoscale Eddy By Cao et al. 2026

Oceanic mesoscale eddies are often thought to have coherent structures that trap water in their cores.🌊

However, a new study shows that smaller-scale motions, known as submesoscale stirring, can disrupt this coherence.

🔗 doi.org/10.1029/2025...

#AGUPubs #Oceans #Oceanography @agu.org

Got ocean science you’re excited about?Want to support 🌊community programs? Looking for editors and reviewers who care? @jgroceans.bsky.social

AGU is now accepting applications for Editors-in-Chief across five publications, with terms starting Jan 1, 2027. These roles help shape editorial standards, research quality, and peer review in Earth & space science. Apply by May 1, 2026.
buff.ly/8Mxy8vq

A Mid-Ocean Ridge in the Norwegian Sea Pumps Out Hydrogen - Eos Vent fluids collected from the Knipovich Ridge contain unexpectedly high concentrations of hydrogen, potentially produced by the degradation of organic matter.

Hydrothermal hydrogen! 🫧 An ROV dive revealed high levels of molecular hydrogen in vent fluids ejected from a bubbly ridge in the Norwegian Sea. 🧪

New research from Alexander Diehl @marumunibremen.bsky.social + colleagues; comments from Jeffrey Seewald @whoi.edu. eos.org/articles/a-m...

Pollution Is Rampant. We Might As Well Make Use of It. - Eos Human-made substances hold dangers for the environment, but they also give scientists a view into recent history.

Nobody *likes* pollution…but sometimes it has its uses as a research tool.

Our Ocean’s “Natural Antacids” Act Faster Than We Thought - Eos New evidence from New Zealand suggests that calcium carbonate dissolution occurs not just over millennial timescales, but over annual and decadal ones too.

You know how antacids can take a while to start working? New research finds that calcium carbonate minerals—the ocean’s version of antacids—might work on faster timescales than scientists realized.🧪🌊

Work out of @universityofotago.bsky.social in @aguadvances.bsky.social. eos.org/research-spo...

Pollution Is Rampant. We Might As Well Make Use of It. - Eos Human-made substances hold dangers for the environment, but they also give scientists a view into recent history.

Nobody *likes* pollution…but sometimes it has its uses as a research tool. eos.org/features/pol...

2️⃣ A new study led by @icecoldwill.bsky.social in @jgroceans.bsky.social looks at the ocean's role in limiting winter sea-ice growth. A metric called “Stability at Freezing Temperature” estimates how much heat the ocean must lose to the atmosphere for ice to form.

▶️ doi.org/10.1029/2025...

👩🎓🚨 Attention Students!

👉 Discover the AGU Honors, Scholarships, and Grants open to eligible students: buff.ly/q0M1YXO

The U.S.'s decision to withdraw from global climate and environmental organizations and treaties will have ramifications far beyond the current administration.

Add your name to our @aguscipolicy.bsky.social letter supporting global climate science: buff.ly/RURRhnt

Celebrate National Mentoring Month as an AGU member 🎉

Unlock career-boosting benefits like AGU Circles, Grant Finder, and First-Time Abstract Submitter Program—plus premium content, leadership opportunities & discounts.

Make 2026 your most supported year yet!

JOIN 👉 buff.ly/Omv0KOk

Plastic Debris Helps Oil Residues Reach Farther Across the Ocean - Eos Scientists matched oil residues found in Florida to a Brazilian spill thousands of miles away.

Oil spills in the ocean typically don’t reach beyond a few hundred miles. But when oil meets plastic debris, it can travel much, much farther. Read more, or listen, here:

How to drill an ice shelf — and why A mission to reach the ocean under the Shackleton Ice Shelf in East Antarctica

Hats off to the New Zealand team behind this research in @jgroceans.bsky.social. Drilling through ice shelves is no easy feat.

▶️ aapp.shorthandstories.com/how-to-drill...

@aucklanduni.bsky.social
@universityofotago.bsky.social

Studying Arctic Fjords with Crowdsourced Science and Sailboats - Eos A new study demonstrates the benefits of crowdsourcing science using sailboats to better understand the impact of melting sea ice in the Arctic.

Happy #CTDAppreciationDay to all who celebrate (and we do)! Here's how researchers are studying Arctic fjords with crowdsourced science, sailboats, and CTDs. eos.org/articles/stu...

High Seas Treaty enters into force: A milestone for ocean conservation The High Seas Treaty, formally known as the Agreement on Biodiversity Beyond National Jurisdiction (BBNJ), enters into force on 17 January 2026.

A smidgeon of good news for the ocean.

Marine Snow Grows Faster and Fluffier as It Sinks - Eos New observations highlight how abiotic and biotic processes influence the tiny oceanic particles.

Oh, the weather underwater is frightful! New research by scientists at @ucsantabarbara.bsky.social + colleagues finds that marine snow’s movements are driven by surface storms and zooplankton. #AGUPubs

Schematic representation of the perfect model approach for the Adriatic Sea with the northern subregion as a nested domain

Downscaling is a common technique used in ocean prediction models to take large-scale information and refine it for local applications. Eidt et al., test the performance of a downscaling technique in the Northern Adriatic Sea 🌊

agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Fill | Help Us Name the #OSM26 Mascot!  Propose a name you think would be a good fit for the OSM26 Highland cow by 23 January.  If your name is chosen, you could win an OSM26 Highland cow! Name submissions will be curated by AGU staff and...

🌊 Help name the #OSM26 mascot! 🐮Propose a name by 23 January for a chance to win your very own Highland cow!

✨ Fun fact: Our cow is sporting our very own custom-made tartan, currently being warped and woven in a mill in Selkirk, Scotland, exclusively for OSM26 merch. 😉

Submit:

AI Sheds Light on Hard-to-Study Ocean Currents - Eos The Maluku Strait is a key predictor of conditions in the Indonesian Throughflow, modeling shows.

The Indonesian Throughflow is as complex as it is important. New #AGUPubs research looks at what makes the currents tick.

eos.org/research-spo...

Melting Glaciers Mix Up Waters More Than We Thought - Eos Existing theory underestimates the mixing of freshwater and seawater by up to 50%.

Remotely operated kayaks let researchers from @marine.rutgers.edu + colleagues gather rare data from the base of a melting glacier.

The results, in @jgroceans.bsky.social, offered unexpected insights about how seawater and freshwater mix near marine-terminating glaciers. eos.org/research-spo...

🏆Whether for your own contributions and accomplishments or those of a remarkable colleague, recognize the excellence of a worthy candidate by nominating them for an AGU Honor!

💫 Nominations are due in March. 👉Learn more about available awards and begin the nomination process today: buff.ly/s3yeWPm

New River Chemistry Insights May Boost Coastal Ocean Modeling - Eos By more realistically accounting for river inputs, researchers reduced overestimation of the amount of carbon dioxide absorbed by coastal waters.

Global ocean models tend to oversimplify the way river chemistry affects coastal seawater. New research takes a step toward fixing that.

U.S. withdrawal from international climate bodies sidelines scientists when climate impacts are accelerating.

AGU remains engaged at UNFCCC COP, supports U.S. scientists in the next #IPCC assessment, & urges Congress to protect science funding.

Science belongs at the table.

More: buff.ly/sYY3rVB