Frerk Pöppelmeier

Uni Bern: Postdoc position: Earth system model development (3 years)

✨I have a vacant 3-yr postdoc position in biogeochemical Earth system model development. If you're interested in geochemical isotopes and their use as paleoceanographic proxies, please consider applying. For any questions on the position, just get in touch✨
ohws.prospective.ch/public/v1/jo...

If you are interested in past carbon cycle changes and thinking of presenting your research at #EGU26.
Please consider submitting your abstract to session CL1.2.5: Earth system and carbon cycle change: new insights from radio- and stable carbon isotopes
www.egu26.eu/session/56936

📣 We seek to appoint a Chair (with rank of professor) within the School of Earth & Environmental Sciences. The successful candidate will be an outstanding scholar of international standing in the field.

🗓 Closing Date: 23 March 2026

Full details: www.vacancies.st-andrews.ac.uk/Vacancies/I/...

Antarctic Intermediate Water Variability in the South Atlantic Over the Last 600,000 years - Soaga - 2025 - Paleoceanography and Paleoclimatology - Wiley Online Library

Expansion of Antarctic Bottom Water driven by Antarctic warming in the last deglaciation - Nature Geoscience Antarctic Bottom Water progressively filled more of the deep Southern Ocean through the last deglaciation, potentially contributing to the increase in atmospheric CO2, according to neodymium isotope r...

⚒️ Article: Antarctic Bottom Water progressively filled more of the deep Southern Ocean through the last deglaciation, potentially contributing to the increase in atmospheric CO2

www.nature.com/articles/s41...

Impact of Atlantic Meridional Overturning Circulation Collapse on Carbon‐13 Components in the Ocean Simulated collapse of the Atlantic Meridional Overturning Circulation affects atmospheric CO2 ${\text{CO}}_{2}$ and δ13CCO2 ${C}_{\mathit{CO2}}$ Largest effect on ocean δ13CDIC ${C}_{\mathit{DIC}...

New publication: how does a collapse of the Atlantic Meridional Overturning Circulation (AMOC) affect carbon and d13C cycles in the ocean?
doi.org/10.1029/2025...
doi.org/10.1029/2025...

📢📢PhD position available!! 📢📢
"Improving future climate prediction through
modelling and data of Earth’s past"
At the University of Bristol, UK.
More details and how to apply:
shorturl.at/wKh2W
..or message me here directly.

ITS2.11/CL0.1
Past to future - towards fully paleo-informed future climate projections www.egu26.eu/session/57722 for paleo constrains on climate that can inform models, spatio-temporal, variability, state approaches to incorporate #palaeoclimate information into GCMs

A new Nature paper accompanying the Global Carbon Budget finds that the land and ocean sinks are 25% smaller and 7% smaller, respectively, than they would have been without the effects of climate change over 2015-24:

Destabilization of Earth system tipping elements - Nature Geoscience A review of observation-based evidence suggests that four interconnected Earth system tipping elements have moved towards their critical thresholds, highlighting the need for better monitoring and increased mitigation efforts.

Destabilization of Earth system tipping elements

(Review) suggesting key Earth system tipping points - like the Greenland Ice Sheet, Amazon rainforest, and AMOC - are losing stability and nearing critical thresholds

Interactions may mask warning signs

www.nature.com/articles/s41...

Do you think climate science needs to be better communicated? We do too! That's why we are looking for a climate science communication specialist to join the Technical Support Unit of the IPCC Working Group I.
All details can be found here: www.ipcc.ch/2025/09/17/c...
Please share!

Day 2 #ICP15 @fpoeppelmeier.bsky.social introducing #AMOC and Constraining past ocean circulation with proxy-enabled Earth system models; introducing the talk is our ECR convenor Pratyusha Chanda 🙏🏼

Schedule of International Conference on Paleoceanography with order of sessions, breaks and social events. #icp15

#ICP15 programme is now live 👇🏼 Find it under ‘My ICP’ -> Programme on the website 🙏🏼
#biogeochemistry
#paleoceanography #paleoclimate
#climate
#earthsystemscience
#conference

We find robust stabilizing feedbacks between both Earth system components. Greenland meltwater may weaken the AMOC, but the then induced cooling limits further Greenland melting and hence also further weakening of the AMOC, at least in moderate warming scenarios.

Fresh of the press, a new study where we investigated the response of the Greenland ice-sheet and AMOC to warming scenarios, in a coupled Earth system model:
iopscience.iop.org/article/10.1...

another (very unintuitive) finding is that the filling time of the ocean is about 2x its maximum ideal age - it takes over 3000 years to fill the mid-depths of the Pacific!

I am co-convening a meeting at the Royal Society later this year, with @krhendry.bsky.social and other very excellent polar science colleagues. If you have interests relating to Antarctica and the impacts of climate change, please consider participating!

📢The Past Ocean Oxygenation @pages-ipo.bsky.social Working Group is here! 🚤 We provide insights into the natural variability of seawater oxygen in key periods of the geological record & communicate the science behind oxygen reconstructions 🐳 PO2 is here! pastglobalchanges.org/science/wg/p...

What do sea-ice associated seabirds do during a season with little sea ice? Results from GPS tracking on snow petrels is now published, led by @elliehonan.bsky.social funded by @erc.europa.eu @leverhulme.ac.uk details here: www.antsie.webspace.durham.ac.uk/2025/06/06/snow-petrel-tracking/ 🧪🐙

Multiple sources of atmospheric CO2 activated by AMOC recovery at the onset of interglacial MIS 9 | PNAS Using high-precision ice core measurements of CO2, δ13C–CO2, CH4, and N2O, this study provides carbon isotope constraints on a sizeable, centennial...

🚨--- New Paper ---🚨

Watch Florian Krauss @iceflow42.bsky.social wield the ¹³C of CO₂ sword across the highest, NATURAL spike in CO₂ and CH₄ of the last 800,000 years.

www.pnas.org/doi/10.1073/...

US federal cuts threaten international ocean science and diplomacy - Nature Ecology & Evolution Nature Ecology & Evolution - US federal cuts threaten international ocean science and diplomacy

Our new paper authored by the Scientific Committee of the
#OOSC on "US federal cuts threaten international ocean science and diplomacy" has been published. www.nature.com/articles/s41...

Schematic illustrations showing source water mixing in the Atlantic Basin during Heinrich Stadial 1 and the Last Glacial Maximum

⚒️ Article: North Atlantic Deep Water formation was only moderately weaker than present during the Last Glacial Period, even when freshwater inputs were high

@paddylaser.bsky.social @unil.bsky.social @fpoeppelmeier.bsky.social @unibe.ch

www.nature.com/articles/s41...

#ICP15 #pleanery speakers across five themes.

#ICP15 #registration and abstract submission deadlines are on 30th April -👇🏼
www.icp15.com/news/registr...

👇🏼 our #plenary #speakers across five themes of #paleoceanography and #paleoclimatology will share new research, ideas and future directions of the field and aims to inspire you all!

Uni Bern: Postdoc position: “Coupled Earth System Modeling” (2 years)

Together with Beni Stocker @stineb.bsky.social we have an open postdoc position (2yr with possibility of extension) in coupled Earth system modelling with a focus on dynamic global vegetation modelling.
ohws.prospective.ch/public/v1/jo...
Get in touch if you are interested.

Trump’s draft budget eviscerates weather and climate tracking and research | CNN The move would devastate weather and climate research even as weather is becoming more erratic and extreme, and would cripple the US industries — including agriculture — that depend on free, accurate ...

The Trump administration plans to eliminate the research arm of National Oceanic and Atmospheric Administration, close all weather and climate labs and eviscerate its budget along with several other NOAA offices, according to internal documents obtained by CNN.

#ICP15 announces speakers for #ocean ocean-climate dynamics: (left to right) Cristiano M Chiessi, Sophie Hines, Frerk Poeppelmier and Xu Zhang

#ICP15 announces #invited #plenary #speakers on #ocean-climate dynamics
Cristiano Chiessi
Sophie Hines @whoi.edu
@fpoeppelmeier.bsky.social Margit Simon @bjerknes.bsky.social
And Xu Zhang @bas.ac.uk

📢 Postdoc Opportunity: Ocean Tipping Points & Impacts!

We're hiring a postdoc in my group at the University of Bern, Switzerland, to study ocean tipping points and their impacts. The position is part of HEurope project TipESM (@tipesm.bsky.social). Feel free to reach out with any questions. 🌊

Only about two weeks left to apply to the open postdoc position.
Get in touch with @stineb.bsky.social or myself, if you are interested.

We are hiring! Full details at the link below. We are looking for 2 postdocs to work on reconstructing past sea surface temperatures and sea ice distributions as part of the "Past 2 Future" consortium seeking to improve climate models with palaeoclimate data durham.taleo.net/careersectio...

Uni Bern: Postdoc position: “Next Generation Bern Earth System Model” The University of Bern is seeking a highly motivated postdoctoral researcher for a two-year position in Earth System Modeling with a focus on land vegetation dynamics, jointly hosted by the Climate an...

Together with @fpoeppelmeier.bsky.social, we have an open 2-year postdoc position on Next Generation Bern Earth System Model at University of Bern and the Oeschger Centre.

ohws.prospective.ch/public/v1/jo...