Jens Daniel Müller

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...

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/...

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! ✨️

🙏 I was marginally involved in this effort and am here to take questions 👋😜

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.

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. 🌊 🧪

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

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.

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/...

🌊 Very exciting opportunity in ocean physics!

Certainly an important task, Andrew 😉 Let's see were we stand in a couple of months, at least in terms of consistency across models. Any recommendations on how to support the model simulations with targeted observations are of course highly welcome.

Also, I’m grateful for five fantastic years in the @upgroup.bsky.social at @usyseth.bsky.social , where I was trusted to lead #RECCAP2. Those experiences and the amazing network I built are the basis for this next adventure!

🇨🇭 Big thanks to @froeltho.bsky.social at University of Bern for hosting me for this project! Working back to back with OAE experts Friedrich Burger and Hendrik Grosselindemann will greatly benefit OAEMIP.

👋 Want to get involved? Don’t hesitate to reach out — there’s still room for more modeling centers to join this important and timely intercomparison effort!

🌐 We already have some fantastic modeling centers on board! Excited to keep working with @jhauck.bsky.social (AWI), @aoschlies.bsky.social (GEOMAR), Jörg Schwinger (NORCE Research), Raffaele Bernadello (Barcelona Supercomputing Center) & Andrew Lenton (CSIRO).

🧑‍🧑‍🧒‍🧒 Looking forward to teaming up with David Keller and @mtyka.bsky.social to make this project a reality.

Also, I’m grateful for five fantastic years in the @upgroup.bsky.social at @usyseth.bsky.social , where I was trusted to lead #RECCAP2. Those experiences and the amazing network I built are the basis for this next adventure!

🇨🇭 Big thanks to @froeltho.bsky.social at University of Bern for hosting me for this project! Working back to back with OAE experts Friedrich Burger and Hendrik Grosselindemann will greatly benefit OAEMIP.

👋 Want to get involved? Don’t hesitate to reach out — there’s still room for more modeling centers to join this important and timely intercomparison effort!

🌐 We already have some fantastic modeling centers on board! Excited to keep working with @jhauck.bsky.social (AWI), @aoschlies.bsky.social (GEOMAR), Jörg Schwinger (NORCE Research), Raffaele Bernadello (Barcelona Supercomputing Center) & Andrew Lenton (CSIRO).

A New OAE Model Intercomparison Project Has Launched  - Carbon to Sea Initiative Today, we’re announcing a new project to enhance researchers’ ability to compare ocean alkalinity enhancement (OAE) modeling results. Through coordinated multi-model studies, the Ocean Alkalinity Enha...

I’ll be coordinating #OAEMIP – the first global Model Intercomparison Project for Ocean Alkalinity Enhancement. Here’s the initial announcement with a few ideas of what we’re planning 👇
www.carbontosea.org/2025/03/20/o...

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

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

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...

Every measurement matters 👏👇

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/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.

Would you dare to link these two aspects in a single news article? Asking for a journalist 🙈

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

Thanks for multiplying, @pfriedling.bsky.social! I'm happy to discuss if some approaches can be picked up in the GCB. For example, to address whether the ocean carbon sink in a particular year was weak(er) or strong(er) (than expected).

Couldn't agree more. Thank you (and all other ocean carbon observers) so much for the tremendous job you are doing out there. Keep things running 🙏🙏🙏

Jan, thanks for helping us to spread the news. And of course for lending us Peter's super powers 😉 He made incredibly important contributions and the whole study could not have been realized without him in the team 🙏

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...

😅 You're so "funny" that I'm happily sharing another link:
rdcu.be/eDAQH

#ClimateChange #OceanCarbonSink #ClimateScience

Finally, some excellent resources on the 2023 SST anomalies:

@polarocean.bsky.social
bsky.app/profile/pola...

@trackow.bsky.social
bsky.app/profile/trac...

bsky.app/profile/mice...

@tguinaldo.bsky.social
bsky.app/profile/tgui...

@profmattengland.bsky.social
bsky.app/profile/prof...