JGR: Oceans

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.
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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...

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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

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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. 😉

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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!

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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

The Northern Sargasso Sea Has Lost Much of Its Namesake Algae - Eos There’s less than a tenth as much Sargassum as there was a few years ago, a shift that may be linked to increasing sea surface temperatures in the Gulf of Mexico.

Since 2015, the amount of Sargassum in the northern Sargasso Sea has decreased by more than 90%.

eos.org/articles/the...

Key findings:

🔥 Summer: Most heat flows toward glaciers, concentrated in the upper 150 m thanks to subglacial discharge.
🌀 Winter: Circulation is surprisingly strong but more 3D than in summer.
➡️ Two distinct winter inflow events: one cold & deep, one relatively warm!

Antarctic Sea Ice - Eos Dear Eos: The ocean around Antarctica is critical to ocean circulation, climate, and ecosystems. There, vast quantities of heat and anthropogenic carbon are drawn down from the atmosphere and stored a...

Antarctica in the winter? Yeah, it really is that cold 🥶❄️🧪

A postcard from the bottom of the world:
eos.org/postcards/an...

What Could Happen to the Ocean’s Carbon If AMOC Collapses - Eos Mass glacier melting may have led this influential ocean current system to collapse at the end of the last ice age. A pair of modeling studies examines how such a collapse could affect dissolved inorg...

New research led by @andreasschmittner.bsky.social @osuceoas.bsky.social simulates an AMOC collapse to learn how it could affect ocean carbon storage, isotopic signatures, and carbon cycling. #AGUPubs 🧪🌊 eos.org/research-spo...

How a Move to the Shallows 300,000 Years Ago Drove a Phytoplankton Bloom - Eos And what that could mean for today’s ocean.

Do alkalinity or nutrient levels have a bigger impact on marine phytoplankton? New research from @eth-eaps.bsky.social provides answers, with ramifications for oceanic carbon cycles and climate change. eos.org/research-spo...

Editor and Associate Editor positions at JGR:Oceans

Ask not what your journal can do for you—ask what you can do for your journal 🌊

JGR:Oceans is now looking for new Editors and Associate Editors, if you're interested get in touch. We don't bite! 😀

Seabed map of the Ross Ice Shelf cavity and the nearby open ocean using the Bedmap-2 data set

The ocean beneath ice shelves plays a critical role in their evolution and stability. Xiahou et al., describe a 4.5-year record of ocean measurements beneath the central Ross Ice Shelf to evaluate how the cavity seawater changes over time 🌊

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

Seaward landfast ice edge occurrence probabilities for three 9-year periods

Landfast sea ice provides a platform for human activities, habitat for shorebirds and marine mammals, and protection from coastal erosion. Mahoney and Einhorn reveal diminishing landfast sea ice in the Beaufort Sea 🌊

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

Geographic setting and station locations for hydrographic sampling of chlorofluorocarbons and SF6

The deep parts of the Arctic's Canada and Makarov Basins are among the most isolated waters in the ocean. Pasqualini et al., use tracer measurements to suggest that the last major flushing of deep water happened about 450 years ago 🌊

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