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Wolfgang Cramer

@wolfgangcramer.net

13K followers 2.4K following 870 posts

#Climate & #biodiversity emeritus scientist, professor of global #ecology, #CNRS, MedECC, #IPCC, Acad. d'Agriculture de France, Chief Editor Regional Environmental Change. Occasional rail travel and bicycle geek. 🇩🇪 🇫🇷 🇬🇧 🇸🇪 🇳🇴 https://tinyurl.com/wcrame .. more

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Wolfgang Cramer @wolfgangcramer.net · Jul 11

Just out: "Climate change risks on key open marine and coastal mediterranean ecosystems" rdcu.be/evGGx

@jpgattuso.bsky.social www.medecc.org

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title, authors and abstract of the paper

Climate change risks on key open marine and coastal mediterranean
ecosystems

Abed El Rahman Hassoun1, Meryem Mojtahid, Mohammad Merheb, Piero Lionello, Jean-Pierre Gattuso & Wolfgang Cramer
Mediterranean open marine and coastal ecosystems face multiple risks that impact their unique biodiversity, with climate change representing a major ongoing threat. While these ecosystems are also under pressure from non-climatic anthropogenic drivers (e.g., overfishing, pollution), this study primarily focuses on risks related to climate change. To assess these risks and evaluate their confidence levels, we adopt the scenario-based approach of the Intergovernmental Panel on Climate
Change (IPCC), relying on a review of literature projecting changes in Mediterranean Sea ecosystems.
The main drivers of environmental change are sea level rise, ocean warming and acidification. Similar to global conditions, all Mediterranean ecosystems face high risks under all climate scenarios, with coastal ecosystems being more strongly impacted than open marine ecosystems. For these coastal ecosystems, risk levels are expected to become very high already once global warming exceeds 0.8 °C with respect to the 1976–2005 period. A few Mediterranean ecosystems (e.g., coralligenous and rocky coasts) are relatively more resilient compared to others, probably because of their long evolutionary history and the presence of a variety of climatic and hydrological conditions. However, high-emission scenarios in specific sub-basins, in addition to acidification impacts, could reduce this resilience, decreasing both habitat extent and ecosystem function dramatically. Overall, due to the higher observed and projected rates of climate change in the Mediterranean, compared to global trends, for
variables such as seawater temperature and pH, marine ecosystems (particularly coastal) are projected to be under higher risks compared to the global ocean.

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Wolfgang Cramer @wolfgangcramer.net · 11h

"1 million d’euros de la région AURA pour que 10 personnes aillent de Le Puy à Paris en avion…" mediascitoyens-diois.info/2025/10/1-mi...

Passagers reguliers du vol Le Puy - Paris

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Reposted by Wolfgang Crämer

Patrick Marques @pmarques35.bsky.social · 1d

[1/8] Annah Lake Zhu (Univ. Wageningen) et Amadou Ndiaye (Univ. Mahtar Mbow) évaluent l’impact réel de la Grande Muraille Verte africaine. Leur étude montre que, malgré 20 milliards $ promis depuis 2007, la reforestation au Sénégal reste très limitée. #geography #GreatGreenWall #Sahel

Africa’s ‘great green wall’ is stalling: in Senegal very few planted areas show progress

Africa’s Great Green Wall of 6,000km of trees was launched 18 years ago, promising to halt desertification. But in Senegal, it’s been very slow to progress.

theconversation.com

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Reposted by Wolfgang Crämer

Patrick Marques @pmarques35.bsky.social · 1d

[1/5] Jérôme Morinière décrit un tournant dans la lutte contre les algues vertes en Côtes-d’Armor. Sur 1300 exploitations situées dans les trois baies touchées, près de 300 ne respectent pas les engagements de réduction des nitrates. Des sanctions pourraient tomber dès 2026. #geography #Brittany

Lutte contre les algues vertes : l’étau se resserre pour 300 exploitations dans les Côtes-d’Armor

Le comité départemental de lutte contre les algues vertes se réunit jeudi 9 octobre 2025. Alors que la saison algues vertes 2025 a donné des résultats encourageants, en Côtes-d’Armor, avec une baisse ...

www.ouest-france.fr

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Wolfgang Cramer @wolfgangcramer.net · 1d

no further explanation needed

Foldable bicycle near the beach of the Baltic, Warnemünde, Germany

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Reposted by Wolfgang Crämer, Stacy D. VanDeveer

Doug Parr @dougparr.bsky.social · 2d

Carbon offsetting suffers from deep-seated systemic problems that incremental change will not solve says review paper from Oxford Uni

“We have assessed 25 years of evidence and almost everything up until this point has failed”

www.theguardian.com/environment/...

Carbon offsets fail to cut global heating due to ‘intractable’ systemic problems, study says

Analysis of 25 years of evidence shows most schemes are poor quality and fail to lower emissions

www.theguardian.com

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Reposted by Wolfgang Crämer, Silvia Secchi

Mark Vossler, MD (he/him) @markvmd.bsky.social · 3d

Carbon capture is the filtered cigarette of our time

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Reposted by Wolfgang Crämer

Scientist Rebellion Germany @scientistrebger.bsky.social · 3d

This October, two scientist trials will be held in France and Germany.

In April 2022, around thirty scientists and activists took over a gallery at the National Museum of Natural History in Paris to raise awareness, without violence, damage or public disturbance.

In October 2022, ...

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Sustainability Café
What can we learn from non-violent climate action?
Beliefs, values, consequences.
Monday, Oct 6th, 2025 | 7:00pm
Room 3220 | Leopoldstr. 13, München
Scientists from the climate action group
ScientistRebellion (SR) will face trial
on October 7 in Munich.
Join our café night to hear about their experiences in climate activism and to exchange ideas about climate action.
The event is open to everyone interested-especially students and academic staff.

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Reposted by Pierre Friedlingstein, Wolfgang Crämer, Peter Jacobs

Dr. Jonathan Foley @globalecoguy.bsky.social · 3d

The jig is up for CCS and DAC.

oilprice.com/Energy/Energ...

The Collapse of Confidence in Carbon Capture | OilPrice.com

Carbon Capture and Storage, once seen as a lifeline for the oil and gas industry, is facing mounting doubts as delays, high costs, and poor performance cast serious doubts on its future viability.

oilprice.com

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Reposted by Wolfgang Crämer

Scientifiques en rébellion @scientifiquesenrebellion.fr · 3d

Le 10 octobre, 4 membres de @scientifiquesenrebellion.fr et de @xrfrance.bsky.social comparaîtront devant la Cour d’appel de Paris, suite à une action au Muséum national d'histoire naturelle en 2022. Le parquet avait fait appel de la relaxe au nom de l'état de nécessité en première instance.

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Reposted by Wolfgang Crämer

Scientifiques en rébellion @scientifiquesenrebellion.fr · 3d

Le 7 octobre, six scientifiques français·es comparaîtront devant le tribunal de district de Munich suite à des actions menées contre BMW et BlackRock en 2022 lors d'une campagne internationale de @scientistrebellion.bsky.social. Des amendes allant jusqu’à 12 800 euros ont été requises !

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Reposted by Wolfgang Crämer, Floriane Clément

Reposted by Wolfgang Crämer

Anne Sophie Novel @soann.bsky.social · 3d

Lecornu nomme un gouvernement qui ne laisse aucun espoir à l'écologie reporterre.net/Lecornu-nomm...

Lecornu nomme un gouvernement qui ne laisse aucun espoir à l'écologie

Le Premier ministre Sébastien Lecornu a annoncé la composition de son gouvernement. Avec des nominations marquées à droite et la reconduction d'Agnès Pannier-Runacher à l'Écologie, l'avenir de notre e...

reporterre.net

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Wolfgang Cramer @wolfgangcramer.net · 4d

Ganz klar ein Winzer der boykottiert gehört.

Reposted by Anna O. Law, Wolfgang Crämer, Lesley A. Hall , and 2 more Anna O. Law, Wolfgang Crämer, Lesley A. Hall, Charles T. Mathewes, Olúfẹ́mi Táíwò

Joshua McElwee @joshmcelwee.org · 4d

Pope Leo urged the world's 1.4 billion Catholics on Sunday to care for immigrants, pressing ahead with a message of welcome for migrants days after criticizing U.S. President Donald Trump's hard-line anti-immigration policies. For @reuters.com:

Pope Leo, after Trump critique, urges Catholics to help immigrants

www.reuters.com

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Reposted by Wolfgang Crämer

Patrick Marques @pmarques35.bsky.social · 4d

[1/8] 🔒 Thomas Piketty (École des hautes études en sciences sociales) appelle l’Europe à rompre avec le libre-échange absolu. Face à la montée du protectionnisme américain, il défend une refondation écologique et sociale du commerce mondial. #geography #trade #Europe

Thomas Piketty : « Si l’Europe n’abandonne pas sa religion du libre-échange, elle court le risque d’un désastre social et industriel »

CHRONIQUE. Dans sa chronique, l’économiste appelle l’Union européenne à instaurer des droits de douane en vue de taxer le CO₂ du transport de marchandises et de contrer les ravages du dumping chinois.

www.lemonde.fr

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Reposted by Wolfgang Crämer

Lea Dohm @leadohm.bsky.social · 4d

Ganz, ganz übel. Und wie schön wäre es, wenn die SPD mal wieder eine Sozialpolitik angeht, die Menschen in schwierigen Lagen real positiv erreicht?
Das betrifft auch sehr viele psychisch Erkrankte. Wohnen ist ein Grundrecht.
www.fr.de/wirtschaft/b...

Bürgergeld-Reform von Bas verschärft Wohnungsnot: Expertinnen warnen – „Nicht bedacht“

Der Gesetzesentwurf zur Bürgergeld-Reform sieht vor, die Karenzzeit für Wohnungen zu streichen. Die Sozialverbände kritisieren diese Maßnahme scharf.

www.fr.de

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Reposted by Wolfgang Crämer

Max Koch @maxkoch.bsky.social · 4d

“They dragged little Greta [Thunberg] by her hair before our eyes, beat her, and forced her to kiss the Israeli flag. They did everything imaginable to her, as a warning to others”

According to another observer, she was “wrapped in the Israeli flag and paraded like a trophy”

Israel accused of detaining Greta Thunberg in infested cell and making her hold flags

Activist tells Swedish officials she has been subjected to harsh treatment, including insufficient food and water

www.theguardian.com

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Reposted by Wolfgang Crämer, Pádua Fernandes, Samuel Depraz

Bon Pote @bonpote.com · 4d

Arrêtée par l'armée israélienne, Greta Thunberg a été tirée par les cheveux, battue et forcée d'embrasser le drapeau israélien.

Soutien à Greta dont le courage et l'engagement pour dénoncer le génocide sont sans faille depuis bientôt 2 ans.

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Reposted by Marianne Blanchard

Wolfgang Cramer @wolfgangcramer.net · 6d

🚂 A peine lancés et déjà supprimés ? Sauvons les trains de nuit Paris-Berlin et Paris-Vienne, un voyage bas-carbone largement plébiscité par ses utilisateurs
agir.greenvoice.fr/petitions/sa...

🚂 Sauvons les trains de nuit Paris-Berlin et Paris-Vienne

Signez la pétition maintenant !

agir.greenvoice.fr

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Reposted by Wolfgang Crämer

Alternet Europe @alterneteurope.bsky.social · 7d

"We didn’t just learn; we built bonds across disciplines, cultures, and generations that I know will last far beyond Peyresq."

2025 Alternet Summer School alum Songül Sönmez shares reflections on her experience in Peyresq. 🌞 Read her testimonial here: alterneteurope.eu/updates/testimonial2025/

Alternet Summer School Testimonial by Songül Sönmez - Alternet

How To Build a “Network for Life” an Alternet Summer School Student Testimonial by Songül Sönmez How do you build a Network for Life? Recipe: ✨ Bring together early-career researchers...

alterneteurope.eu

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Reposted by Wolfgang Crämer

Kumi Naidoo @kuminaidoo.bsky.social · 7d

“A picture paints a thousand words.” 🕊️❄️

Deep gratitude to Pope Leo XIV for this powerful reminder through art and spirit: if we do not act now, we risk destroying not only our present but also our past and our future.

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Reposted by Wolfgang Crämer, Ilona M. Otto

Damian Carrington @dpcarrington.bsky.social · 7d

Pope Leo condemns climate change critics

- "Some have chosen to deride the increasingly evident signs of climate change, to ridicule those who speak of global warming, and even to blame the poor"

Story by @mattmcgrathbbc.bsky.social
HT @carbonbrief.org
www.bbc.co.uk/news/article...

Pope Leo hits out at critics of global warming

In his first major statement on climate change, the pontiff criticises those who minimise climate change.

www.bbc.co.uk

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Reposted by Gavin A. Schmidt, Wolfgang Crämer, Ed Hawkins

Melaine Le Roy @subfossilguy.bsky.social · 8d

The anthropogenic glacier collapse currently underway in the Alps has resulted in the disappearance of >1000 small glaciers! 😱🔥

Following the release of Swiss glacier loss numbers today, let me introduce you the now extinct Vadret da Triazza (Eastern Switzerland) ✝️

Via @matthias-huss.bsky.social

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Reposted by Tatiana Filatova, Wolfgang Crämer

Dr. Jonathan Foley @globalecoguy.bsky.social · 9d

Direct air capture (DAC) continues to be small, slow, and very expensive.

Not because it’s an early stage technology, but because it runs into fundamental thermodynamic challenges that money can’t solve.

This is exactly why it’s not recommended by Project Drawdown.

www.ft.com/content/fa4c...

Direct carbon capture falters as developers’ costs fail to budge

Some experts say the technology is crucial for climate change goals but scaling up is proving hard

www.ft.com

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Reposted by Wolfgang Crämer

George Smeeton @gsmeeton.bsky.social · 9d

Growth in global carbon emissions has slowed to just 0.32 per cent a year in the decade since the Paris Agreement was signed in late 2015, shows @eciu.net analysis:

www.businessgreen.com/news/4519655...

'Brakes slammed': Global emissions growth has slowed drastically in decade since Paris Agreement

Global emissions have grown just 1.17 per cent since COP21 versus an 18.4 per cent increase in the decade to 2015, ECIU analysis shows

www.businessgreen.com

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Reposted by Wolfgang Crämer, Stefan C. Aykut

Till Hilmar @tillhilmar.bsky.social · 9d

📣 In a new open access article in @environmentalpol.bsky.social, I examine how appeals to "economic realism" – like the claim that we "can’t afford climate policy" – have long structured far-right #climateskepticism @cidape.bsky.social @ifswien.bsky.social
www.tandfonline.com/doi/full/10....

Cassandra from the far right: how the German and Austrian populist radical right links climate skepticism with economic issues

This article asks how two populist radical right parties, the German AfD and the Austrian FPÖ, communicate about climate on Twitter/X. Analyzing a corpus of 6,254 tweets, it pays special attention ...

www.tandfonline.com

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Reposted by Marianne Blanchard

Wolfgang Cramer @wolfgangcramer.net · 14d

... moi qui croyais que le gouvernement allait se pencher sur les subventions accordées à la plupart des aéroports régionaux du pays, souvent déficitaires, mais non : www.lemonde.fr/economie/art...

Les trains de nuit Paris-Berlin et Paris-Vienne menacés faute de subvention de l’Etat

Avec la décision du gouvernement de mettre fin aux aides financières, ces deux lignes déficitaires devraient s’arrêter d’ici à la fin de l’année.

www.lemonde.fr

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Wolfgang Cramer @wolfgangcramer.net · 14d

I had a reservation Strasbourg - Berlin on that train earlier this year. During the day of departure, SNCF texted me saying, "your train runs on schedule, but it will not stop in Strasbourg". No hint about what I might do with this information.

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