Prof. Stefan Rahmstorf
@rahmstorf.bsky.social
Climate scientist, professor of Physics of the Oceans in Potsdam. Opinions my own.
Reposted by Prof. Stefan Rahmstorf
I think that this @natgeosci.nature.com paper—now published in the November issue of this journal—is worth checking out:
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
Earth system response to Heinrich events explained by a bipolar convection seesaw - Nature Geoscience
The onset of Southern Ocean convection following a slowing of the Atlantic Meridional Overturning Circulation during Heinrich events can help explain rapid CO2 increases and Antarctic warming during t...
doi.org
November 10, 2025 at 10:36 AM
I think that this @natgeosci.nature.com paper—now published in the November issue of this journal—is worth checking out:
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
Am Freitag könnt ihr die vielen Menschen unterstützen, die sich derzeit beim Klimagipfel #COP30 in Belém für unsere Zukunft einsetzen - und auch ein Signal an die Bundesregierung senden. Jede Verzögerung von Klimaschutz kostet viel Geld, Glaubwürdigkeit, Menschenleben, Zukunft.
November 10, 2025 at 11:10 PM
Am Freitag könnt ihr die vielen Menschen unterstützen, die sich derzeit beim Klimagipfel #COP30 in Belém für unsere Zukunft einsetzen - und auch ein Signal an die Bundesregierung senden. Jede Verzögerung von Klimaschutz kostet viel Geld, Glaubwürdigkeit, Menschenleben, Zukunft.
“Wir in Deutschland importieren fossile Brennstoffe für mehr als 80 Milliarden Euro pro Jahr. Das ist buchstäblich verbranntes Geld.
Sogar in Deutschland verkaufen sich Wärmepumpen, allen Kampagnen, aller Desinformation zum Trotz, längst besser als Gasheizungen.”
www.spiegel.de/wissenschaft...
Sogar in Deutschland verkaufen sich Wärmepumpen, allen Kampagnen, aller Desinformation zum Trotz, längst besser als Gasheizungen.”
www.spiegel.de/wissenschaft...
Meinung: Klimakonferenz in Brasilien: Fünf Gründe, warum diese COP ein Erfolg werden könnte
Bei der Klimakonferenz im brasilianischen Belém gibt es Grund zur Hoffnung. Das zeigt sich schon an der Autokolonne, in der Brasiliens Präsident Lula beim Gipfeltreffen vorfuhr.
www.spiegel.de
November 10, 2025 at 1:23 PM
“Wir in Deutschland importieren fossile Brennstoffe für mehr als 80 Milliarden Euro pro Jahr. Das ist buchstäblich verbranntes Geld.
Sogar in Deutschland verkaufen sich Wärmepumpen, allen Kampagnen, aller Desinformation zum Trotz, längst besser als Gasheizungen.”
www.spiegel.de/wissenschaft...
Sogar in Deutschland verkaufen sich Wärmepumpen, allen Kampagnen, aller Desinformation zum Trotz, längst besser als Gasheizungen.”
www.spiegel.de/wissenschaft...
Taifune sind - genau wie Hurrikane - tropische Wirbelstürme (sie heißen nur im Pazifik anders). Sie bekommen durch die globale Erwärmung immer mehr Zerstörungskraft. www.tagesschau.de/ausland/asie...
Nächster Taifun trifft Philippinen: Fast eine Million Menschen evakuiert
Erst vor wenigen Tagen riss der verheerende Taifun "Kalmaegi" Hunderte Menschen in den Tod, jetzt zieht ein neuer Tropensturm über die Philippinen. Fast eine Million Menschen verlassen ihre Häuser.
www.tagesschau.de
November 9, 2025 at 10:50 AM
Taifune sind - genau wie Hurrikane - tropische Wirbelstürme (sie heißen nur im Pazifik anders). Sie bekommen durch die globale Erwärmung immer mehr Zerstörungskraft. www.tagesschau.de/ausland/asie...
Informativer Podcast zum beginnenden Klimagipfel in Belém und der Rolle der EU!
www.ardaudiothek.de/episode/urn:...
www.ardaudiothek.de/episode/urn:...
Podcast: Europas Klima-Blues: Bremser oder Treiber bei der COP?
Mit Ach und Krach hat sich die EU kurz vor der Weltklimakonferenz in Belém auf ein Klimaziel für 2040 geeinigt - doch das wirkt halbherzig. Hat sich die EU ihre Rolle als Vorreiter beim Klima verscher...
www.ardaudiothek.de
November 8, 2025 at 10:07 PM
Informativer Podcast zum beginnenden Klimagipfel in Belém und der Rolle der EU!
www.ardaudiothek.de/episode/urn:...
www.ardaudiothek.de/episode/urn:...
“The death of human empathy is one of the earliest and clearest signs of a culture descending into barbarism.”
A good quote but I was informed it’s not from Hannah Arendt, so I deleted my post which included that wrong attribution.
A good quote but I was informed it’s not from Hannah Arendt, so I deleted my post which included that wrong attribution.
November 8, 2025 at 9:27 AM
“The death of human empathy is one of the earliest and clearest signs of a culture descending into barbarism.”
A good quote but I was informed it’s not from Hannah Arendt, so I deleted my post which included that wrong attribution.
A good quote but I was informed it’s not from Hannah Arendt, so I deleted my post which included that wrong attribution.
Indeed this is an excellent nuanced and optimistic response to Bill Gates by @hausfath.bsky.social !
(Though admittedly less entertaining than @climateadam.bsky.social.)
It’s a good example of how to debate constructively about solving the #climatecrisis.
(Though admittedly less entertaining than @climateadam.bsky.social.)
It’s a good example of how to debate constructively about solving the #climatecrisis.
November 7, 2025 at 8:30 AM
Indeed this is an excellent nuanced and optimistic response to Bill Gates by @hausfath.bsky.social !
(Though admittedly less entertaining than @climateadam.bsky.social.)
It’s a good example of how to debate constructively about solving the #climatecrisis.
(Though admittedly less entertaining than @climateadam.bsky.social.)
It’s a good example of how to debate constructively about solving the #climatecrisis.
Today the 2025 State of the Cryosphere report was published by over 50 leading cryosphere scientists.
An urgent warning about the global consequences of the meltdown of ice, including the risk of shutdown of the Atlantic Ocean current system #AMOC. 🌊
iccinet.org/statecryo25/
An urgent warning about the global consequences of the meltdown of ice, including the risk of shutdown of the Atlantic Ocean current system #AMOC. 🌊
iccinet.org/statecryo25/
November 6, 2025 at 10:43 PM
Today the 2025 State of the Cryosphere report was published by over 50 leading cryosphere scientists.
An urgent warning about the global consequences of the meltdown of ice, including the risk of shutdown of the Atlantic Ocean current system #AMOC. 🌊
iccinet.org/statecryo25/
An urgent warning about the global consequences of the meltdown of ice, including the risk of shutdown of the Atlantic Ocean current system #AMOC. 🌊
iccinet.org/statecryo25/
What did Bill Gates actually write? What is right and what is bizarre about it? And how was it then distorted by the media?
Climate Adam explains it in his inimitable way. Check it out!https://youtube.com/watch?v=9MmqKEkOtwo
Climate Adam explains it in his inimitable way. Check it out!https://youtube.com/watch?v=9MmqKEkOtwo
Climate Scientist Responds to Bill Gates
YouTube video by ClimateAdam
youtube.com
November 6, 2025 at 3:26 PM
What did Bill Gates actually write? What is right and what is bizarre about it? And how was it then distorted by the media?
Climate Adam explains it in his inimitable way. Check it out!https://youtube.com/watch?v=9MmqKEkOtwo
Climate Adam explains it in his inimitable way. Check it out!https://youtube.com/watch?v=9MmqKEkOtwo
Guterres is right.
Even a temporary overshoot could unleash far greater destruction and costs for every nation. It could push ecosystems past catastrophic and irreversible tipping points.
Fossil fuel companies are deceiving the public and obstructing progress. www.theguardian.com/environment/...
Even a temporary overshoot could unleash far greater destruction and costs for every nation. It could push ecosystems past catastrophic and irreversible tipping points.
Fossil fuel companies are deceiving the public and obstructing progress. www.theguardian.com/environment/...
Missing 1.5C climate target is a moral failure, Guterres tells Cop30 summit
UN secretary general urges opening session in Brazil to bring about a ‘fundamental paradigm shift’
www.theguardian.com
November 6, 2025 at 2:48 PM
Guterres is right.
Even a temporary overshoot could unleash far greater destruction and costs for every nation. It could push ecosystems past catastrophic and irreversible tipping points.
Fossil fuel companies are deceiving the public and obstructing progress. www.theguardian.com/environment/...
Even a temporary overshoot could unleash far greater destruction and costs for every nation. It could push ecosystems past catastrophic and irreversible tipping points.
Fossil fuel companies are deceiving the public and obstructing progress. www.theguardian.com/environment/...
Hier habe ich vor Jahren schon erklärt, warum die Erderwärmung Tropenstürme verschlimmert: www.spiegel.de/wissenschaft...
Die Katastrophen häufen sich - unfassbar wie zeitgleich die Politik den Klimaschutz verwässert statt zu beschleunigen. Die Emissionen wirken kumulativ und müssen schnell runter.
Die Katastrophen häufen sich - unfassbar wie zeitgleich die Politik den Klimaschutz verwässert statt zu beschleunigen. Die Emissionen wirken kumulativ und müssen schnell runter.
November 6, 2025 at 9:42 AM
Hier habe ich vor Jahren schon erklärt, warum die Erderwärmung Tropenstürme verschlimmert: www.spiegel.de/wissenschaft...
Die Katastrophen häufen sich - unfassbar wie zeitgleich die Politik den Klimaschutz verwässert statt zu beschleunigen. Die Emissionen wirken kumulativ und müssen schnell runter.
Die Katastrophen häufen sich - unfassbar wie zeitgleich die Politik den Klimaschutz verwässert statt zu beschleunigen. Die Emissionen wirken kumulativ und müssen schnell runter.
Reposted by Prof. Stefan Rahmstorf
I feel like "the ocean makes half the O2 we breathe" is the chemical oceanographers version of the "gulf stream = AMOC" misunderstanding physical oceanographers deal with... 🌊
The ocean regulates our climate, nourishes hundreds of millions of people around the world, and produces about half of the oxygen on Earth. 🌊 ✨
So, when you take a deep breath this #NationalRelaxationDay, be sure to thank the ocean. 💙
So, when you take a deep breath this #NationalRelaxationDay, be sure to thank the ocean. 💙
November 5, 2025 at 10:18 AM
I feel like "the ocean makes half the O2 we breathe" is the chemical oceanographers version of the "gulf stream = AMOC" misunderstanding physical oceanographers deal with... 🌊
Reposted by Prof. Stefan Rahmstorf
New national climate plans have barely moved the needle on limiting global warming. Yet there is hope.
According to UNEP's latest #EmissionsGap Report, accelerated adoption of renewable energy and falling costs mean we have the tools to cut emissions now: www.unep.org/news-and-sto...
According to UNEP's latest #EmissionsGap Report, accelerated adoption of renewable energy and falling costs mean we have the tools to cut emissions now: www.unep.org/news-and-sto...
November 4, 2025 at 2:08 PM
New national climate plans have barely moved the needle on limiting global warming. Yet there is hope.
According to UNEP's latest #EmissionsGap Report, accelerated adoption of renewable energy and falling costs mean we have the tools to cut emissions now: www.unep.org/news-and-sto...
According to UNEP's latest #EmissionsGap Report, accelerated adoption of renewable energy and falling costs mean we have the tools to cut emissions now: www.unep.org/news-and-sto...
Reposted by Prof. Stefan Rahmstorf
Most Americans support the Paris Agreement.
Seems hard to believe right now.
But notice the downtick/ uptick after presidential elections. Less people care when they think the government is on it. But when the government is out, interest grows again.
climatecommunication.yale.edu/publications...
Seems hard to believe right now.
But notice the downtick/ uptick after presidential elections. Less people care when they think the government is on it. But when the government is out, interest grows again.
climatecommunication.yale.edu/publications...
November 4, 2025 at 11:23 PM
Most Americans support the Paris Agreement.
Seems hard to believe right now.
But notice the downtick/ uptick after presidential elections. Less people care when they think the government is on it. But when the government is out, interest grows again.
climatecommunication.yale.edu/publications...
Seems hard to believe right now.
But notice the downtick/ uptick after presidential elections. Less people care when they think the government is on it. But when the government is out, interest grows again.
climatecommunication.yale.edu/publications...
Huge congratulations to Harvard’s Naomi Oreskes for winning the Volvo prize! She is a pioneer in unmasking the financial interests and methods behind climate science denial.
I’m proud to have published with her how Exxon knew exactly what they were doing.
www.environment-prize.com/laureates/na...
I’m proud to have published with her how Exxon knew exactly what they were doing.
www.environment-prize.com/laureates/na...
Naomi Oreskes - Volvo Environment Prize
Harvard Professor Naomi Oreskes, a world-renowned earth scientist and historian, is the laureate of the 2025 Volvo Environment Prize. She is recognized for her influential work on the history of scien...
www.environment-prize.com
November 3, 2025 at 3:29 PM
Huge congratulations to Harvard’s Naomi Oreskes for winning the Volvo prize! She is a pioneer in unmasking the financial interests and methods behind climate science denial.
I’m proud to have published with her how Exxon knew exactly what they were doing.
www.environment-prize.com/laureates/na...
I’m proud to have published with her how Exxon knew exactly what they were doing.
www.environment-prize.com/laureates/na...
New study in Nature by Lin et al shows how the sea-level rise from the melting Ice Age ice (a total of 120 meters rise) ended thousands of years ago.
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
November 3, 2025 at 12:09 PM
New study in Nature by Lin et al shows how the sea-level rise from the melting Ice Age ice (a total of 120 meters rise) ended thousands of years ago.
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Reposted by Prof. Stefan Rahmstorf
A scoop that I’m not happy to report:
CBS News has gutted its climate change reporting team, one of the best in the business, and one of the only ones on cable news that consistently called out fossil fuels as the main source of climate pollution.
heated.world/p/cbs-news-k...
CBS News has gutted its climate change reporting team, one of the best in the business, and one of the only ones on cable news that consistently called out fossil fuels as the main source of climate pollution.
heated.world/p/cbs-news-k...
CBS News kills its climate unit
David Ellison, the new pro-Trump chief executive of Paramount Skydance, has dismantled the best climate change reporting team in cable news.
heated.world
October 31, 2025 at 3:51 PM
A scoop that I’m not happy to report:
CBS News has gutted its climate change reporting team, one of the best in the business, and one of the only ones on cable news that consistently called out fossil fuels as the main source of climate pollution.
heated.world/p/cbs-news-k...
CBS News has gutted its climate change reporting team, one of the best in the business, and one of the only ones on cable news that consistently called out fossil fuels as the main source of climate pollution.
heated.world/p/cbs-news-k...
All you need to know about Bill Gates' long-standing and misguided take on climate change.
'The solution to the climate crisis isn’t going to come from the fairy-dust-sprinkled flying unicorns that are the “benevolent plutocrats.” They don’t exist.'
thebulletin.org/2025/10/you-...
'The solution to the climate crisis isn’t going to come from the fairy-dust-sprinkled flying unicorns that are the “benevolent plutocrats.” They don’t exist.'
thebulletin.org/2025/10/you-...
Michael Mann to Bill Gates: You can’t reboot the planet if you crash it
What Gates is putting forward aren’t legitimate arguments that can be made in good faith. They are shopworn fossil fuel industry talking points.
thebulletin.org
November 3, 2025 at 10:48 AM
All you need to know about Bill Gates' long-standing and misguided take on climate change.
'The solution to the climate crisis isn’t going to come from the fairy-dust-sprinkled flying unicorns that are the “benevolent plutocrats.” They don’t exist.'
thebulletin.org/2025/10/you-...
'The solution to the climate crisis isn’t going to come from the fairy-dust-sprinkled flying unicorns that are the “benevolent plutocrats.” They don’t exist.'
thebulletin.org/2025/10/you-...
Extended hurricane category scale, following Wehner&Kossin, Proceedings of the National Academy 2024: www.pnas.org/doi/abs/10.1...
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
November 2, 2025 at 4:56 PM
Extended hurricane category scale, following Wehner&Kossin, Proceedings of the National Academy 2024: www.pnas.org/doi/abs/10.1...
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
Quote to remember:
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
Was Hurricane Melissa Super Hurricane? Is Category 6 needed? I took a deep dive in my weekend Forbes piece citing
@katharinehayhoe.com @michaelemann.bsky.social @bmcnoldy.bsky.social @weatherprof.bsky.social Rheeda walker
Let me know your thoughts after reading it
www.forbes.com/sites/marsha...
@katharinehayhoe.com @michaelemann.bsky.social @bmcnoldy.bsky.social @weatherprof.bsky.social Rheeda walker
Let me know your thoughts after reading it
www.forbes.com/sites/marsha...
Revisiting The Category 6 Conversation After Hurricane Melissa
Hurricane Melissa may be the strongest hurricane to make landfall in the Atlantic basin. It has also ignited discussion about the need for a Category 6 designation.
www.forbes.com
November 2, 2025 at 12:37 PM
Quote to remember:
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
Reposted by Prof. Stefan Rahmstorf
With 40 cm of snow left on the ground last Wednesday, Iceland’s capital, Reykjavík, officially experienced its biggest October snowstorm on record. This historic event shattered a 104-year-old record by 25 cm.
November 1, 2025 at 2:31 PM
With 40 cm of snow left on the ground last Wednesday, Iceland’s capital, Reykjavík, officially experienced its biggest October snowstorm on record. This historic event shattered a 104-year-old record by 25 cm.
Great listing of climate films!
I would have added ‘Chasing Ice’.
I would have added ‘Chasing Ice’.
I've finally got around to curating a selection of films about the #climate crisis 🎥
There's lot of mediocre climate films out there, but for me these stand out head & shoulders above the rest 🎞️
They make excellent resources for classrooms, lecture halls, or community cinema's 🎬
Thread:🧵Plz RT
There's lot of mediocre climate films out there, but for me these stand out head & shoulders above the rest 🎞️
They make excellent resources for classrooms, lecture halls, or community cinema's 🎬
Thread:🧵Plz RT
November 1, 2025 at 12:08 PM
Great listing of climate films!
I would have added ‘Chasing Ice’.
I would have added ‘Chasing Ice’.
AXA and Ipsos have published the 12th edition of the Future Risks Report, a report based on a global survey of 23,000 citizens and 3,595 risk experts.
What do both experts and citizens rank as greates risk?
*** Climate change ***
So do I, after over 35 years experience in climate science.
What do both experts and citizens rank as greates risk?
*** Climate change ***
So do I, after over 35 years experience in climate science.
October 31, 2025 at 9:41 AM
AXA and Ipsos have published the 12th edition of the Future Risks Report, a report based on a global survey of 23,000 citizens and 3,595 risk experts.
What do both experts and citizens rank as greates risk?
*** Climate change ***
So do I, after over 35 years experience in climate science.
What do both experts and citizens rank as greates risk?
*** Climate change ***
So do I, after over 35 years experience in climate science.
Important thread.
"I don't think many folks, apparently including Gates & advisors, appreciate just how radically transformed a 2.5-3C warmer world would be."
Indeed that is the key problem. They don't get it. But whenever we try to state it clearly, it's dismissed as alarmist. Catch 22.
"I don't think many folks, apparently including Gates & advisors, appreciate just how radically transformed a 2.5-3C warmer world would be."
Indeed that is the key problem. They don't get it. But whenever we try to state it clearly, it's dismissed as alarmist. Catch 22.
I strongly agree--both because I personally believe that it's the right thing to do and also because the evidence supports it--that rapidly addressing poverty, health inequity, and food/water insecurity should be a first-order priority. Full stop. No argument there. [3/n]
October 31, 2025 at 9:27 AM
Important thread.
"I don't think many folks, apparently including Gates & advisors, appreciate just how radically transformed a 2.5-3C warmer world would be."
Indeed that is the key problem. They don't get it. But whenever we try to state it clearly, it's dismissed as alarmist. Catch 22.
"I don't think many folks, apparently including Gates & advisors, appreciate just how radically transformed a 2.5-3C warmer world would be."
Indeed that is the key problem. They don't get it. But whenever we try to state it clearly, it's dismissed as alarmist. Catch 22.
The annual 10 new insights in climate science are here!
Perhaps the best way to keep up with climate science news of the past year, made for lay people, policy makers and scientists alike with its different levels of detail: from simple tiles to a journal paper.
10insightsclimate.science#explore
Perhaps the best way to keep up with climate science news of the past year, made for lay people, policy makers and scientists alike with its different levels of detail: from simple tiles to a journal paper.
10insightsclimate.science#explore
10 New Insights in Climate Science
Essential research findings to support decision-making in a critical decade.
10insightsclimate.science
October 31, 2025 at 8:52 AM
The annual 10 new insights in climate science are here!
Perhaps the best way to keep up with climate science news of the past year, made for lay people, policy makers and scientists alike with its different levels of detail: from simple tiles to a journal paper.
10insightsclimate.science#explore
Perhaps the best way to keep up with climate science news of the past year, made for lay people, policy makers and scientists alike with its different levels of detail: from simple tiles to a journal paper.
10insightsclimate.science#explore