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Felix Schaumann

@felixschaumann.bsky.social
354 followers 400 following 24 posts

Interested in climate change and all the science around it - PhD candidate in climate economics at ETH Zürich. Mainly working with IAMs. also @felixschaumann@mas.to, @felixschaumann@twitter

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Reposted by Felix Schaumann
Eduardo Alastrué de Asenjo @edualastrue.bsky.social · 01/05/2026
#EGU26 is around the corner, and I'm super excited to convene the first session dedicated only to AMOC changes & impacts 🌊🌍 Check out our fantastic line of oral and poster presentations, including our invited speaker @froeltho.bsky.social: www.egu26.eu/session/57485
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Felix Schaumann @felixschaumann.bsky.social · 08/01/2026
🌊 Finally, there will be an #EGU26 session about the AMOC! Specifically, about the impacts of AMOC weakening, very broadly defined - from paleo to the future, form observations to modelling, from physics to economics, ... Please do submit - Looking forward to a great session 😊 More details 👇
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Bartosz Bartkowski @bartoszbartk.com · 12/12/2025
📣The DFG research training group ECO-N at @unileipzig.bsky.social has just announced 14 new PhD🎓 vacancies within its 2nd cohort, on topics incl clean air💨, climate change🌀, soil biodiv🪱 and forests🌳. More info on ECO-N: www.eco-n.org Vacancy announcement: uni-leipzig.b-ite.careers/jobposting/9...
eco-n.org
Universität Leipzig: Economics of Connected Natural Commons
The Research Training Group ECO-N trains a new generation of sustainability researchers to develop both an excellent command of quantitative research methods for understanding specific natural or human-made commons and adopt a systemic perspective on connected natural commons.
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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · 22/10/2025
Planning to attend #EGU26? Interested in the impacts of AMOC weakening? New session alert! 🚨🌊🧪 ITS2.5/CL0.5: "AMOC impacts: physical, biogeochemical, and societal" Check out our interdisciplinary session description & submit your abstract here: meetingorganizer.copernicus.org/EGU26/sessio...
Poster advertising EGU26 session ITS2.5/CL0.5, titled "AMOC impacts: Physical, Biogeochemical, and Societal"
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Felix Schaumann @felixschaumann.bsky.social · 26/09/2025
Is "overshoot" replacing "tipping points" in the climate discourse? I wrote a short blog post exploring this idea. Bottom line: it's all about urgency and irreversibility, but overshoot can circumvent some problems that the tipping points framing has. Read the full post here: s.gwdg.de/wRWft8
climatematters.blogs.uni-hamburg.de
Is Climate Overshoot the New Tipping Points? – Climate Matters
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Rupert Stuart-Smith @rupertstuartsmith.bsky.social · 22/04/2025
🚨 We are hiring! I am looking for a climate scientist postdoc to join my team at Oxford working on a project on climate change and health until Feb 2028. For more details: www.linkedin.com/feed/update/... 📅 Apply by 14 May here: my.corehr.com/pls/uoxrecru...
linkedin.com
🚨 We are hiring! I am looking for a postdoc to join my team at the… | Rupert Stuart-Smith
🚨 We are hiring! I am looking for a postdoc to join my team at the University of Oxford, working on a Wellcome Trust-funded project on climate change and health. The post will run until February 2028....
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Max-Planck-Gesellschaft @maxplanck.de · 13/03/2025
[Video] AMOC-Schwächung könnte Billionen kosten. Die #AMOC-Abschwächung verringert die #CO₂-Aufnahme, verstärkt die Erderwärmung & erhöht die Kosten - so die neue Studie von @felixschaumann.bsky.social & @edualastrue.bsky.social (MPI für Meteorologie). Carolin Riethmüller fasst für Euch zusammen➡️🔗
youtu.be
Billionen Kosten durch schwächere Meeresströmung | Wissen Was News
YouTube video by MaxPlanckSociety
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Reposted by Felix Schaumann
Proceedings of the National Academy of Sciences @pnas.org · 03/03/2025
Climate change could weaken the Atlantic Meridional Overturning Circulation (AMOC), which would cool the Northern Hemisphere. A weaker AMOC could also diminish ocean carbon uptake, thus increasing the social cost of carbon. In PNAS: www.pnas.org/doi/10.1073/...
Overview of the modeling approach. (A) The Max Planck Institute Earth System Model is used to simulate climate states with an artificially weakened Atlantic Meridional Overturning Circulation (AMOC). (B) The resulting changes in annual ocean carbon storage are then analyzed as a function of the simulated AMOC. (C) The strength of the AMOC carbon feedback is estimated until 2100. (D) The economic impact of these projected changes is then analyzed.
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Annie Leymarie @annieleymarie.bsky.social · 02/03/2025
Economic impact studies tend to find a weaker AMOC globally beneficial, as lower temperatures in the Northern Hemisphere would offset some global warming & associated economic damages - but new paper shows this ignores reduced C uptake by oceans & Social Cost of Carbon. See bsky.app/profile/feli...
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DIE ZEIT @zeit.de · 26/02/2025
Der Kollaps einer Meeresströmung könnte Europa extrem kalte Winter wie in Kanada bringen, warnten Forschende zuletzt. Unwahrscheinlich, sagt eine neue Studie. Was stimmt?
zeit.de
AMOC: Eine kleine Wahrscheinlichkeit, dass etwas sehr Schlimmes passiert
Der Kollaps einer Meeresströmung könnte Europa extrem kalte Winter wie in Kanada bringen, warnten Forschende zuletzt. Unwahrscheinlich, sagt eine neue Studie. Was stimmt?
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Moritz Drupp @moritzdrupp.bsky.social · 25/02/2025
Check out this great paper by @felixschaumann.bsky.social with @edualastrue.bsky.social out now in @pnas.org that integrates climate science with climate economics to study the social cost of carbon implications of reduced AMOC weakening. Super impressive work for a first PhD chapter👇
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ESRAH University of Hamburg @esrah.uni-hamburg.de · 25/02/2025
💰 Weaker ocean circulation may cost trillions A new study by @felixschaumann.bsky.social and @edualastrue.bsky.social in @pnas.org reveals that a weakening Atlantic Meridional Overturning Circulation (AMOC) could lead to costs of several trillion euros. #CLICCS #climate #ocean @uni-hamburg.de
buff.ly
Weaker ocean current could cost trillions
Faculties
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Andy Revkin 🌎 ✍🏼 🪕 ☮️ revkin.substack.com @revkin.bsky.social · 25/02/2025
No cheers for warming slowdown from potential weakening of AMOC given carbon drawdown impact. New study.
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Meertext @meertext.bsky.social · 25/02/2025
Die Abschwächung der #AMOC bietet neben den bereits oft prognostizierten Abkühlungseffekten für Nordeuropa weitere spannende Skills: Sie wird wohl auch die CO2-Aufnahmekapazität des Nordatlantiks verringern. #Klimakrise #Nordatlantik #Ozean #Ozeanographie
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Felix Schaumann @felixschaumann.bsky.social · 25/02/2025
🚨 First PhD paper in @pnas.org 🥳 🌊 @edualastrue.bsky.social and I looked at how much less CO2 will be taken up by the ocean if the #AMOC weakens - and how this reduced ocean carbon uptake affects the social cost of CO2 emissions. 📝 Read the paper here: doi.org/10.1073/pnas... 🧵 A thread [1/11]
doi.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
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ClimateFran @climatefran.bsky.social · 17/12/2024
Excited to announce a new @pnas.org publication on the Social Cost of Carbon. We integrate evidence from the literature and expert survey to provide an SCC distribution inclusive of both parametric and structural uncertainties. Our mean 2020 value is $283 per ton CO2 www.pnas.org/doi/10.1073/...
pnas.org
Synthesis of evidence yields high social cost of carbon due to structural model variation and uncertainties | PNAS
Estimating the cost to society from a ton of CO2—termed the social cost of carbon (SCC)—requires connecting a model of the climate system with a re...
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Bob Kopp @bobkopp.net · 03/12/2024
In a new interdisciplinary Nature Climate Change Perspective paper, led by me, @lisgilmore and Rachael Shwom, we offer a critical perspective on #climate and social “tipping points.” 🎁: rdcu.be/d2gBC 🧵
rdcu.be
‘Tipping points’ confuse and can distract from urgent climate action
Nature Climate Change - The tipping points framing is widely used in climate discussions but receives mixed feedback. This Perspective critiques it for oversimplifying the complexities of natural...
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Chris Smith @cjsmith.eu · 03/12/2024
The model calibration paper for fair is now published in Geoscientific Model Development! 🎉 TLDR: how do we constrain a highly parameterised model to observational and assessed constrained ranges, with uncertainty? gmd.copernicus.org/articles/17/...
gmd.copernicus.org
fair-calibrate v1.4.1: calibration, constraining, and validation of the FaIR simple climate model for reliable future climate projections
Abstract. Simple climate models (also known as emulators) have re-emerged as critical tools for the analysis of climate policy. Emulators are efficient and highly parameterised, where the parameters a...
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Eduardo Alastrué de Asenjo @edualastrue.bsky.social · 26/11/2024
There are so many cool starter packs around here 💙 But I have not seen yet any specifically on the AMOC, so I decided to create one now 🌊 Let me know if you want to be included too! #AMOC #Atlantic #OceanCirculation go.bsky.app/JxFDh6b
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Reto Knutti @retoknutti.bsky.social · 18/11/2024
Softening the definition of Net Zero won’t stop global warming. As authors of the 2009 “Net Zero Papers” we call on countries and companies to recognise the need for Geological Net Zero, balancing flows of carbon into and out of the Earth’s crust. www.theguardian.com/environment/...
theguardian.com
Countries could use nature to ‘cheat’ on net zero targets, scientists warn
By relying on natural carbon sinks such as forests and peatlands to offset emissions, governments can appear closer to goals than they actually are
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Jacob Edenhofer @jacobedenhofer.bsky.social · 19/08/2024
go.bsky.app/7PReUyF
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Ben Sanderson @benmsanderson.bsky.social · 19/08/2024
#AcademicSky Maybe dealing with GPTs hallucinating papers should give us a reason to update our 20th century approaches to article referencing. Can't we just use the DOI when writing papers and stop pretending that anybody is going to go to a physical library to find a specific journal volume?
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Brian Prest @bprest.bsky.social · 15/08/2024
New article published today at Science Policy Forum, joint with co-authors Lisa Rennels, Frank Errickson, and David Anthoff www.science.org/doi/10.1126/...
science.org
Equity weighting increases the social cost of carbon
New government guidelines could transform benefit-cost analysis of US climate policy
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Zeke Hausfather @zekehausfather.com · 14/08/2024
Starting 250 years ago, we began putting lots of carbon that was buried underground for millions of years into the atmosphere. All in all we’ve emitted nearly 2 trillion tons of CO2 from fossil fuels, which is more than the total mass of the biosphere or all human structures:
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Andrew Dessler @andrewdessler.com · 12/08/2024
On The Climate Brink, I explain the problems with this graphic. In fact, climate models do an excellent job simulating the climate. www.theclimatebrink....
graphic from Donald Trump that shows that climate models are overestimating warming in the summertime central US.
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Felix Schaumann @felixschaumann.bsky.social · 14/04/2024
Interested in economic effects of AMOC weakening? Join us tomorrow afternoon in #EGU24 session CL3.2.3 to hear about how the AMOC affects the carbon cycle and through that the social cost of carbon! Also if you just want to hang out and talk climate economics, anytime! :)
title slide of our talk "flipping the cost of tipping? economic impacts of reduced AMOC carbon drawdown"
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Felix Schaumann @felixschaumann.bsky.social · 11/12/2023
Stoked to be at my first AGU next week! Check out my talk on Thursday on economic assessment of AMOC changes, and let me know if you wanna grab a coffee and talk science ☕🤓 #AGU23
Reduced AMOC Carbon Drawdown and its Effect on the Social Cost of Carbon — slide advertising talk at AGU23
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Chris Smith @cjsmith.eu · 17/11/2023
EGU 2024 session announcement: Techniques and advances in climate economics, econometrics and integrated assessment modelling meetingorganizer.copernicus.org/EGU24/sessio... egu24.eu
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ESRAH University of Hamburg @esrah.uni-hamburg.de · 20/11/2023
Follow the water movement along the AMOC with a stunning new visualization by Felicia Brisc and Nuno Serra from CEN @uni-hamburg.de. Headphones on 🎧! ➡️ www.youtube.com/watch?v=U9ca...
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Ketan Joshi @ketanjoshi.co · 12/11/2023
This survey from 2009 is really a wild read. Most climate scientists surveyed thought 4-5C by end of century was the most likely, and that 2C was close to impossible to achieve. Imagine the results if you took this exact survey again today.... www.theguardian.com/environment/...
World will not meet 2C warming target, climate change experts agree
This article is more than 14 years old
Guardian poll reveals almost nine out of 10 climate experts do not believe current political efforts will keep warming below 2C
David Adam, environment correspondent
Tue 14 Apr 2009 01.01 CEST
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Almost nine out of 10 climate scientists do not believe political efforts to restrict global warming to 2C will succeed, a Guardian poll reveals today. An average rise of 4-5C by the end of this century is more likely, they say, given soaring carbon emissions and political constraints.

Such a change would disrupt food and water supplies, exterminate thousands of species of plants and animals and trigger massive sea level rises that would swamp the homes of hundreds of millions of people.

The poll of those who follow global warming most closely exposes a widening gulf between political rhetoric and scientific opinions on climate change. While policymakers and campaigners focus on the 2C
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undercoverhist.bsky.social @undercoverhist.bsky.social · 24/10/2023
"Once we open the door to consider catastrophic change, a whole new debate is engaged...If we cannot reliably judge how potential geophysical changes will affect civilization, can we use the plain vanilla cost-benefit analysis (or even the Haagen Dazs variety in dynamic optimization models)?"
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Robin Lamboll @robinlamboll.bsky.social · 30/10/2023
Today, our paper updating the amount of carbon we can release before breaching the Paris agreement temperature targets has been released into the world! Read it www.nature.com/articles/s41..., about it here: scienceisshiny.wordpress.com/2023/10/30/c...
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Jan Rosenow @janrosenow.bsky.social · 27/10/2023
NEW RESEARCH: Overall mining actually DECREASES substantially even when just accounting for coal. Mass of minerals for energy transition technologies is a fraction of mass of coal produced in current fossil-dominated energy system. www.sciencedirect.com/science/arti...
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Robert Rohde @rarohde.bsky.social · 23/10/2023
This year's record-setting Canadian fires burned >3 times as much carbon as all of Canada's annual fossil fuel use. Canadian fossil fuel emissions (2021): 545 MtCO₂ Canadian wildfire emissions (typical year): 290 MtCO₂ Canadian wildfire in 2023 (CAMS estimate): 1,740 MtCO₂
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Simon Kuestenmacher @simongerman600.bsky.social · 20/10/2023
Hurray, @pythonmaps finally published the river basin map for my birth country of Germany. I was born and raised in the red part (even though it’s very black politically).
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Adam Sobel @adamsobel.bsky.social · 10/10/2023
New on Deep Convection (and my first post on here): the Chief Scientist of NOAA, Dr. Sarah Kapnick! Sarah has had an amazing career so far, and we covered as much of it as we could in under an hour. What an honor for our little podcast! deep-convection.org/2023/10/09/e...
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Felix Schaumann @felixschaumann.bsky.social · 20/10/2023
After wondering for years how to disentangle the interpretations of different parts in IAM welfare functions, today I learned how one can cleanly separate time preference and inequality aversion — great work!
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David Ho @davidho.bsky.social · 16/10/2023
What is common knowledge in your field but shocks outsiders? More than half the CO₂ emissions of the Industrial Age have been pumped into the atmosphere since 1990.
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Zeke Hausfather @zekehausfather.com · 19/10/2023
One critical question around climate tipping elements is the type of threshold behavior - do global temperatures need to only temporarily pass a critical level, or do they have to stay there for centuries. Thankfully for Greenland it seems to be the latter: www.nature.com/articles/d41...
nature.com
Greenland’s massive ice sheet is melting — here’s how to save it
The ice sheet could experience runaway melting if the world overshoots climate targets, but even then quick action could stabilize it. The ice sheet could experience runaway melting if the world overs...
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