JGR: Oceans

Don’t miss this #AGU25 oral session on the future of geoscience.

AGU CEO Janice Lachance, #MIT’s Maria Zuber & @nasonline.org President Marcia McNutt discuss challenges, blind spots & restoring public trust—moderated by Gordon E. Grant.

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Tiny Turbulent Whirls Keep the Arctic Ocean Flowing - Eos Centimeter-sized turbulence controls the rate at which the Arctic Ocean churns.

Changing circulation patterns in the Arctic Ocean could affect weather thousands of miles away. Researchers dig into the details in new work. eos.org/research-spo...

Graphic for session titled "Navigating your first publication: tips for emerging scientists"

Calling early career researchers!📢

At #AGU25, learn how to craft a paper, from outlining to creating accessible figures. Engage with editors and get insights on manuscript submissions and the peer review process.

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#AGUPubs #EarlyCareer #PeerReview

Overview of the field campaign setting and data collection locations

Stress–strain relationships are fundamental to understanding sea ice deformation mechanics. Fedders et al., use in-situ sensors to obtain stress and strain measurements at the ice surface, constraining these values under natural conditions 🌊

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Summertime temperature (°C) averaged over 17 yrs (2004–2020) along the reference transect from South Africa to Antarctica

Using eXpendable BathyThermographs (XBTs) and Argo temperature data during summer between 2004 and 2020, Hu et al., characterize temperature change in the Southern Ocean from South Africa to Antarctica 🌊

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

A Cryobank Network Grows in the Coral Triangle - Eos As the ocean becomes increasingly inhospitable for corals, researchers in the Coral Triangle are turning to cryopreservation to freeze, thaw, and save the region’s hundreds of coral species.

A new effort is establishing Southeast Asia’s first coral cryobanks. These frozen repositories can preserve coral from increasingly inhospitable oceans.

New in Perspectives Twenty-Five Years of Shifting Ground: Reflections on Publishing and Editing in the Earth Sciences by Xenopoulos 2025

In a new Perspectives article, Dr. Maggie Xenopoulos, Editor-in-Chief of @jgrbiogeo.bsky.social, reflects on the dramatic changes to the scholarly publishing environment that have occurred over the past 25 years.

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#AGUPubs #ScholarlyPublishing #Publishing #EarthScience

Participants of the March 2025 C-CoMP cruise AE2504 sit together on the top of the R/V Atlantic Explorer. Photo shared by Ben Acosta.

Co-chief scientists Elizabeth Kujawinski and Sonya Dyhrman hug and reflect as they watch the sunrise from the deck of the R/V Atlantic Explorer at the end of the second C-CoMP cruise, AE2520. Photo by Erin Maybach.

Participants (left to right: Claire Garfield, Eleanor Lawrence, Amanda Ellis, and Emily Hu) of the September 2025 C-CoMP cruise AE2520 sit together on the R/V Atlantic Explorer as they wait to disembark from Bermuda for the cruise! Photo by Fadime Stemmer.

Members of the cruise team work together to prepare the CTD rosette for deployment. Photo by Claire Garfield.

🌊🦠#FieldworkFriday
Team work makes the dream work! We asked our cruise team and they agree - team work is essential for troubleshooting and creating a positive environment for all on board 🚢, laying the groundwork for forging lasting connections that last beyond the cruise! 🧪

Photo of sea ice in the Chukchi Sea during an oceanographic research cruise aboard the University of Alaska Fairbanks research vessel Sikuliaq.

Drone photograph of the University of Alaska Fairbanks research vessel Sikuliaq in the Pacific Arctic.

Today we are running the last of the seawater samples from the Distributed Biological Observatory project. The research cruise is on the UAF RV Sikuliaq in the Pacific Arctic. #FieldworkFriday
🧪🌊🦑🐻‍❄️ @uafairbanks.bsky.social

Sikuliaq is an Iñupiaq word for "young sea ice".

📸 S. Sandy and E. Roth

The study location and profiles of water column properties collected from 2005–2024

Nares Strait is a gateway for the export of Arctic waters to the North Atlantic. Yet the long-term evolution of its water masses is poorly characterized. Barut et al., use data from 2006–2024 to resolve temporal variability in key mass properties 🐻‍❄️ 🌊

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

Chart showing the main topographic features along the Antarctic Circumpolar Current

The Antarctic Circumpolar Current circling Antarctica is mainly driven by the strong Southern Hemisphere Westerly winds. Schiavon et al., use model simulations to test whether the main frontal jets will shift southwards under climate change 🌊

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Sign up to meet with an AGU Editor December 16-18th AGU Central Exhibit hall

Thinking about publishing your work with AGU?

Sign up for a 15 minute 1-on-1 meeting with an AGU editor at #AGU25 for advice on finding the right journal and submitting your work!

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#AGUPubs #EarlyCareer

Reconstruction of landslide volume and pre-event topobathymetry

Landslide-generated tsunamis represent a significant hazard in coastal, fjord, and lake environments. Romano et al., use a combination of 2D and 3D models to simulate tsunamis induced by granular landslides in complex geometries
🌊

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

Polar bear crossing melt-pond-laden sea ice and looking at me taking a picture from aboard the USCGC Polar Sea.

Field photo Friday. Polar Bear on sea ice in northern Chuckchi Sea/southern Arctic Ocean (I can’t remember exactly where). Photo taken from USCGC Polar Sea on AWS ‘98 cruise.

🧪⚒️🥼❄️🌊

Crew of the HMS Protector inspecting a large pumice clast (∼40 cm in diameter) from the 1962 Protector Shoal raft

Pumice rafts are floating mats of volcanic rock from the eruption of underwater or coastal volcanoes. Monteath et al., analyze the chemistry of pumice from the Falkland Islands and trace its origin from ∼20,000 km away in the South Sandwich Islands 🌊

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

Tracing Black Carbon’s Journey to the Ocean - Eos Scientists surveyed a trio of estuaries in pursuit of a missing source of oceanic dissolved black carbon.

Scientists found a missing source of the ocean’s dissolved black carbon.

eos.org/research-spo...

Read more in our year-end issue: bit.ly/Eos-Nov-Dec2025

Glacier Runoff Becomes Less Nutritious as Glaciers Retreat - Eos Sediment from retreating, land-terminating glaciers contains proportionally fewer micronutrients such as iron and manganese, reducing the glaciers’ value to microorganisms at the base of the food web.

The "nutritional value" of glacial runoff is changing. Researchers found meltwater from retreating glaciers delivers sediment with lower concentrations of usable iron and manganese to coastal ecosystems. ❄️🧪 eos.org/articles/gla...

Examples of rip currents from 3 locations in north California

Wave-driven flows like rip currents disperse particulates seaward from the surfzone and create a turbid nearshore zone. Speiser et al., use Sentinel-2 imagery to reveal the drivers of turbid nearshore zone dynamics in north California 🌊

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

People bundled up in heavy winter coast and gear line up on snow mobiles on snow and ice under a dark sky.

Moving people and equipment during fieldwork can be difficult during the best of times. For the MOSAiC team, inclement weather, polar night, and their location directly on the sea ice provided unique challenges for transportation. #FieldworkFriday

📸: Matthew Shupe/CIRES

East Antarctic temperature, as simulated by the ACCESS-OM2-01 model. Colors show the ocean's bottom temperature on the continental shelf, and at 1,000 m depth north of the shelf break (defined by 1,000 m isobath, shown by black contour line) for the year of 2012. The green box highlights the location of Vincennes Bay and the dashed black line indicates the location of Wilkes Land. The study region in relation to the Antarctic continent (green box) and relevant ice shelf/glacier systems is displayed as an inset on the top left.

2/ But what drives the intrusions of warm water onto Antarctica’s continental shelf, where they can destabilise glaciers? A new study in @jgroceans.bsky.social led by Natalia Ribeiro @imos-aus.bsky.social uses a model to simulate how warm water gets into Vincennes Bay.

▶️ doi.org/10.1029/2025...

5,500 Toxic Sites in the U.S. at Risk of Flooding as Seas Rise - Eos Rising sea levels have put thousands of facilities containing hazardous materials at risk of flooding this century, according to a new study published in Nature Communications.

Thousands of industrial sites containing hazardous materials are at risk of flooding this century, putting nearby communities at risk.

eos.org/research-and...

New in JGR: Oceans: Drivers of Spatiotemporal Distributions of Macro- and Micronutrients (Fe, Ni, Cu, Zn) in the Northern Gulf of Alaska by Ortega et al. 2025.

Ortega et al. (2025) used high-resolution seasonal data to analyze the spatiotemporal distribution of nutrients in the Northern Gulf of Alaska, providing new insights into nutrient delivery processes.

🔗Check out their #OpenAccess study: doi.org/10.1029/2025...

#AGUPubs #Alaska

Terra Nova Bay in the northwestern Ross Sea

If meltwater forms deep in the ocean it can be supercooled and freeze into platelet ice crystals, which contribute to sea ice formation. Brett et al., find thick bands of platelet ice formed from Ice Shelf Water released by the Campbell Ice Tongue 🌊

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Science fraud is on the rise, facilitated by for-profit, open-access journals (Richardson et al, 2025, PNAS). These same journals are accelerating author and reviewer burnout by profiting from quantity while neglecting quality. Choose society journals where reputation and community are everything!

A New Way for Coastal Planners to Explore the Costs of Rising Seas - Eos A framework featuring a range of plausible future sea level rise scenarios could help coastal planners prepare critical infrastructure for the worst-case scenario.

Tactical decision game strategies could help coastal planners better prepare for sea level rise.

New research in #AGUPubs by @jweeksclimate.bsky.social @metoffice.gov.uk and colleagues. eos.org/research-spo...

Want to publish in a high-quality AGU journal but worried about publication fees? Don't be, we still want your science!

If you are not able to pay the publication fees, you may request a fee waiver. Please email the journal and our staff will assist you.

authorservices.wiley.com/author-resou...

Are you a dynamic, organized ocean scientist and an enthusiastic writer and communicator? Lead and serve your community as an editor @jgr-oceans! Follow this link to apply tinyurl.com/OceansEditors

Ocean Tunneling May Have Set Off an Ancient Pacific Cooldown - Eos The ocean’s depths cooled off about 1.5 million years ago, and scientists think watery tunnels from the south may be to blame.

Cold, fresh waters from the south may have tunneled into the Pacific’s depths 1.5 million years ago.

New research from Jacek Raddatz @geomarkiel.bsky.social & colleagues, input from @luongomatt.bsky.social at the University of Washington. eos.org/articles/oce...

Abrupt Changes in the Timing and Magnitude of the North Atlantic Bloom Over the 21st Century Future stability of the North Atlantic bloom (NAB) examined using Earth system and high-resolution ocean model configurations The NAB collapses (halving of chlorophyll) across much of the North A...

In JGR Oceans (2025), Stephen Kelly, Ekaterina Popova, Andrew Yool, Fatma Jebri, Sophy Oliver and Meric Srokosz show that the North Atlantic Bloom 🌊 may face abrupt shifts this century🐟

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Satellite image over Fram Strait showing heavy sea ice cover in the Greenland Sea

Ocean mesoscale eddies are the most important agent of horizontal mixing across oceanic fronts. Bashmachnikov et al., investigate the effect of eddies on sea ice cover in the Greenland Sea finding that eddies limit the eastward spread of ice 🧊 🐻‍❄️ 🌊

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