Wolfgang Crämer | Lightnews

Wolfgang Cramer

@wolfgangcramer.net

13K followers 2.5K following 900 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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Environmental science 62%

Geography 17%

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Wolfgang Cramer @wolfgangcramer.net · 6d

I agree of course - but I also notice that there exist quite closed circles of citation, in climate science and elsewhere. As soon as you go a little broader in interdisciplinarity, things are a lot less simple. And sometimes we don't cite because not all papers really bring important new findings.

Reposted by Wolfgang Crämer, Baylor Fox‐Kemper, John Fasullo

Gavin Schmidt @climateofgavin.bsky.social · 7d

Still waiting for the Climate Working Group (TM) to respond to the many critiques of the DOE-commissioned report, but meanwhile the hits keep coming...

The Rate of U.S. Coastal Sea‐Level Rise Doubled in the Past Century. Piecuch (2025)
agupubs.onlinelibrary.wiley.com/doi/10.1029/...

The Rate of U.S. Coastal Sea‐Level Rise Doubled in the Past Century

Tide-gauge records are used to quantify relative sea-level (RSL) acceleration along the contiguous U.S. (CONUS) during the past century Average CONUS RSL rates doubled from 2 mm yr−1 ${\text{yr}}...

agupubs.onlinelibrary.wiley.com

Reposted by Wolfgang Crämer

Patrick Marques @pmarques35.bsky.social · 7d

[1/6] Sarah El Safty et Moayed Kenany analysent la crise hydrique qui compromet l’objectif d’autosuffisance en blé de #Irak. Leur enquête montre comment sécheresse, changement climatique et barrages en amont fragilisent un système agricole dépendant du #Tigre et de #Euphrate. #geography #water

Iraq's dreams of wheat independence dashed by water crisis

Iraqi wheat farmer Ma'an al-Fatlawi has long depended on the nearby Euphrates River to feed his fields near the city of Najaf. But this year, those waters, which made the Fertile Crescent a cradle of ...

www.reuters.com

Reposted by Wolfgang Crämer

Dr Angel Borja @drangelborja.bsky.social · 7d

Trump team plans to break up ‘global mothership’ of climate science

This "new" policy advocates against "ideological" issues and they are dominated by ideology in the bad sense

#climatechange
#research

www.nature.com/articles/d41...

Trump team plans to break up ‘global mothership’ of climate science

Much of the National Center for Atmospheric Research’s non-climate portfolio will be dispersed, the White House says.

www.nature.com

Reposted by Wolfgang Crämer

Patrick Marques @pmarques35.bsky.social · 7d

[1/6] J. Kippenberg analyse les abus liés à l’essor mondial de l'extraction minière. La hausse de la D en minerais pour la transition énergétique et la défense révèle des chaînes d’approvisionnement marquées par des atteintes graves à l’environnement et aux droits humains, surtout dans les Suds.

¿Actuarán los gobiernos para abordar los abusos en la minería?

Con el aumento la demanda de minerales para la transición energética y la defensa, es fundamental que los gobiernos garanticen la protección de los derechos humanos y el medio ambiente en las cadenas ...

elpais.com

Reposted by Peter Thorne, Wolfgang Crämer

Patrick Marques @pmarques35.bsky.social · 7d

[1/6] É. Diallo et C. Gazel analysent la #Durance, un fleuve fortement aménagé. Depuis 1950's, barrages et canaux ont transformé cette rivière alpine en artère énergétique et agricole majeure, au cœur du développement de la Provence, mais au prix d’importants déséquilibres écologiques. #geography

La Durance, une rivière domptée au détriment du vivant

Les eaux détournées de la Durance sont indispensables à la prospérité de la Provence. Mais ces aménagements et prélèvements ont des conséquences écologiques majeures sur la biodiversité.

www.liberation.fr

Reposted by Wolfgang Crämer

James Bullock @jmbecologist.bsky.social · 7d

Important study of ‘high-impact low-likelihood’ or ‘worst-case’ climate scenarios

“The impacts of climate change could plausibly be much worse than conventionally assessed”
agupubs.onlinelibrary.wiley.com/doi/10.1029/...

High‐Impact Low‐Likelihood Climate Scenarios for Risk Assessment in the UK

We present two sets of high-impact low-likelihood climate scenarios for the UK, designed for risk assessment and complementing conventional climate scenarios One set describes “worst-case” change...

agupubs.onlinelibrary.wiley.com

Reposted by Wolfgang Crämer, Fabián Muniesa, Césari Laurent , and 3 more Wolfgang Crämer, Fabián Muniesa, Césari Laurent, Julien Bétaille, Marianne Blanchard, Samuel Depraz

Bon Pote @bonpote.com · 7d

ENORME retournement de situation pour l’autoroute A69 : le parquet de Toulouse demande sa suspension immédiate pour atteinte à l’environnement.
A lire en exclusivité, interview du juriste Hervé Hourcade chez FNE Occitanie qui a monté le dossier de plainte : bonpote.com/suspension-d...

Suspension de l'A69 : comment 5 bénévoles font plier le chantier

Ce 18 décembre, le procureur de Toulouse a demandé la suspension des travaux sur 46 sites du chantier, qui a débordé illégalement sur

bonpote.com

Wolfgang Cramer @wolfgangcramer.net · 8d

Can I say that, as long as you don't mention the specific case, your claim is not very helpful? I can think of a lot of papers which I don't refer to all the time. Am I "canceling" them then?

Reposted by Gavin A. Schmidt, Wolfgang Crämer, Dana R. Fisher

Ketan Joshi @ketanjoshi.co · 8d

So much trash in this Matt Yglesias NYT rant but this specific bit where has has a go at @doctorvive.bsky.social is absurd even for him.

Eliminating fossil fuels is basic fundamental science shit, not environmentalist shit

archive.ph/02ze4

www.ipcc.ch/report/ar6/s...

A realistic look at the Senate map makes it clear that Democrats’ hopes hinge on states that have important fossil fuel industries. A Democratic Party that is open to responsible stewardship of those states’ natural resources can win majorities and invest in solutions for tomorrow — just as Democratic governors in energy-producing states like New Mexico and Colorado have used oil and gas revenue to finance a goal of universal child care and historic upgrades to conservation and recreation on public lands.
The current view from the environmental movement, as expressed by the climate activist and author Genevieve Guenther, is that Democrats should ignore these practicalities because “reducing emissions by some marginal amount while locking in fossil fuel development prevents us from drawing emissions down to (net) zero.”
In this approach to making policy, one starts with an end goal — two degrees of warming; global net zero by 2050 — and asks whether some specific new project is consistent with that goal or not.
Since this would require a very rapid phaseout of fossil fuel use in rich countries, no new fossil fuel infrastructure is permissible even when the infrastructure would — like new pipelines to the northeastern United States or new liquefied natural gas export terminals — likely make emissions lower by promoting more rapid electrification.
This mentality explains why green groups continually find themselves opposing bipartisan congressional negotiations to enact permitting reform legislation that would make it easier to build both renewable and fossil fuel infrastructure. A world that was heading to global net zero in 25 years would not enact such a reform, so it’s unacceptable.

Reaching net zero CO2 or GHG emissions primarily requires deep and rapid reductions in gross emissions of CO2, as well
as substantial reductions of non-CO2 GHG emissions (high confidence). For example, in modelled pathways that limit
warming to 1.5°C (>50%) with no or limited overshoot, global methane emissions are reduced by 34 [21–57]% by 2030
relative to 2019. However, some hard-to-abate residual GHG emissions (e.g., some emissions from agriculture, aviation,
shipping, and industrial processes) remain and would need to be counterbalanced by deployment of CDR methods to
achieve net zero CO2 or GHG emissions (high confidence). As a result, net zero CO2 is reached earlier than net zero GHGs
(high confidence). {3.3.2, 3.3.3, Table 3.1, Figure 3.5} (Figure SPM.5)
B.6.3 Global modelled mitigation pathways reaching net zero CO2 and GHG emissions include transitioning from fossil fuels
without carbon capture and storage (CCS) to very low- or zero-carbon energy sources, such as renewables or fossil fuels
with CCS, demand-side measures and improving efficiency, reducing non-CO2 GHG emissions, and CDR47. In most global
modelled pathways, land-use change and forestry (via reforestation and reduced deforestation) and the energy supply
sector reach net zero CO2 emissions earlier than the buildings, industry and transport sectors. (high confidence) {3.3.3,
4.1, 4.5, Figure 4.1} (Figure SPM.5, Box SPM.1)
B.6.4 Mitigation options often have synergies with other aspects of sustainable development, but some options can also
have trade-offs. There are potential synergies between sustainable development and, for instance, energy efficiency
and renewable energy. Similarly, depending on the context48, biological CDR methods like reforestation, improved
forest management, soil carbon sequestration, peatland restoration and coastal blue carbon management can enhance
biodiversity and ecosystem functions, employment and local livelihoods. However, afforestation or production of
biomass cro…

Energy Systems
C.3.2 Net zero CO2 energy systems entail: a substantial reduction in overall fossil fuel use, minimal use of unabated fossil
fuels51, and use of carbon capture and storage in the remaining fossil fuel systems; electricity systems that emit no
net CO2; widespread electrification; alternative energy carriers in applications less amenable to electrification; energy
conservation and efficiency; and greater integration across the energy system (high confidence). Large contributions
to emissions reductions with costs less than USD 20 tCO2-eq-1 come from solar and wind energy, energy efficiency
improvements, and methane emissions reductions (coal mining, oil and gas, waste) (medium confidence). There are
feasible adaptation options that support infrastructure resilience, reliable power systems and efficient water use for
existing and new energy generation systems (very high confidence). Energy generation diversification (e.g., via wind,
solar, small scale hydropower) and demand-side management (e.g., storage and energy efficiency improvements) can
increase energy reliability and reduce vulnerabilities to climate change (high confidence). Climate responsive energy
markets, updated design standards on energy assets according to current and projected climate change, smart-grid
technologies, robust transmission systems and improved capacity to respond to supply deficits have high feasibility in
the medium to long term, with mitigation co-benefits (very high confidence). {4.5.1} (Figure SPM.7)

We have options in all sectors to at least halve emissions by 2030

Limiting global warming will require major transitions in the energy sector. This will involve a substantial reduction in fossil fuel use, widespread electrification, improved energy efficiency, and use of alternative fuels (such as hydrogen).

“Having the right policies, infrastructure and technology in place to enable changes to our lifestyles and behaviour can result in a 40-70% reduction in greenhouse gas emissions by 2050. This offers significant untapped potential,” said IPCC Working Group III Co-Chair Priyadarshi Shukla. “The evidence also shows that these lifestyle changes can improve our health and wellbeing.”

Cities and other urban areas also offer significant opportunities for emissions reductions. These can be achieved through lower energy consumption (such as by creating compact, walkable cities), electrification of transport in combination with low-emission energy sources, and enhanced carbon uptake and storage using nature. There are options for established, rapidly growing and new cities.

“We see examples of zero energy or zero-carbon buildings in almost all climates,” said IPCC Working Group III Co-Chair Jim Skea. “Action in this decade is critical to capture the mitigation potential of buildings.”

Reducing emissions in industry will involve using materials more efficiently, reusing and recycling products and minimising waste. For basic materials, including steel, building materials and chemicals, low- to zero-greenhouse gas production processes are at their pilot to near-commercial stage.

This sector accounts for about a quarter of global emissions. Achieving net zero will be challenging and will require new production processes, low and zero emissions electricity, hydrogen, and, where necessary, carbon capture and storage.

Agriculture, forestry, and other land use can provide large-scale emissions reductions and also remove and store carbon dioxide at scale. However, land ca…

Reposted by Wolfgang Crämer, Dominique Roux

Agence France-Presse @afp.com · 8d

🇫🇷 Le parquet de Toulouse a annoncé requérir une suspension des travaux de l'autoroute A69, dont le chantier entre Castres et Toulouse "s'est étendu sans autorisation" sur "un total de 46 sites", précisant avoir saisi le juge des libertés et de la détention.

Reposted by Wolfgang Crämer, Rupert Read, James Connelly

Emma Monk @monkemma.bsky.social · 8d

Wow @thetimes.com, that’s impressive

An entire article about “freak heat” in the Dolomites causing mayhem amongst skiers without once mentioning climate change…🤷🏼‍♀️

🧵
1/5

Reposted by Wolfgang Crämer

l'Humanité @humanite.fr · 10d

Sous la pression des lobbies, la Commission européenne s’apprête à déréguler les pesticides au mépris de la santé

➡️ https://l.humanite.fr/Ivo

Reposted by Wolfgang Crämer

Vert, le média 💚 @vert.eco · 10d

Sud Radio a reçu lundi une nouvelle mise en garde du gendarme de l’audiovisuel pour plusieurs séquences climatosceptiques repérées par l’association @quotaclimat.org.

C’est la troisième fois que la radio est épinglée pour des propos à rebours du consensus scientifique sur le climat. Plus d'infos 👇

«Ceux qui affirment qu'il y a un changement climatique ont des intérêts» : Sud Radio de nouveau épinglée pour désinformation climatique

Déçu de radio. Sud Radio a reçu lundi une nouvelle mise en garde du gendarme de l’audiovisuel pour plusieurs séquences climatosceptiques repérées par l’association Quota Climat. C’est la troisième foi...

vert.eco

Reposted by Wolfgang Crämer

Jutta Paulus @juttapaulus.bsky.social · 10d

🚨 Alarm! EU Kommission will Pestizide unbefristet zulassen!
Gälte das heute schon, wären u.a. folgende Pestizide noch auf dem Markt:
☠️ Chlorpyrifos (verursacht Hirnschäden)
☠️ Mancozeb (hormonschädigend)
☠️ Imidacloprid (Bienenkiller)

Jetzt protestieren ⤵️
umweltinstitut.org/landwirtscha...

Pestizid-Alarm: Stoppen wir die Giftpläne der EU!

Jetzt Appell unterzeichnen!

umweltinstitut.org

Reposted by Wolfgang Crämer, Dominik Wiedenhofer

Paul Lehmann @plehmann.bsky.social · 10d

"Greenhouse gas (GHG) emissions from drained peatlands account for about 7% of the total anthropogenic GHG emissions in the European Union (EU). [...] Four main emission hotspots emerge: the North Sea region, eastern Germany, the Baltics together with eastern Poland, and north Ireland."

Identifying hotspots of greenhouse gas emissions from drained peatlands in the European Union - Nature Communications

An EU-wide analysis shows that drained peatlands are major, underreported sources of greenhouse gases. By mapping emission hotspots, the study provides guidance for targeted rewetting and strengthens ...

www.nature.com

Reposted by Wolfgang Crämer, Dominik Wiedenhofer

Damian Carrington @dpcarrington.bsky.social · 10d

New research: The global criminalisation and repression of climate and environmental protest – a repertoire of repression

#climatecrisis
HT @carbonbrief.org
www.tandfonline.com/doi/full/10....

The global criminalisation and repression of climate and environmental protest – a repertoire of repression

This paper sets out a repertoire of repression operating to criminalise and repress recent climate and environmental protest globally. Deploying a novel mixed methods approach, involving a comparat...

www.tandfonline.com

Reposted by Wolfgang Crämer, Laura Pereira

Communications Earth & Environment @commsearth.nature.com · 11d

🌊Sea-level rise in African large marine ecosystems has accelerated markedly since 2010, mostly due to ice sheet loss and land subsidence, with the Red Sea and Guinea Current rising fastest.

👉Read more here:
www.nature.com/articles/s43...

Accelerating sea level rise in Africa and its large marine ecosystems since the 1990s - Communications Earth & Environment

Sea-level rise in African large marine ecosystem has accelerated markedly since 2010, mostly due to ice sheet loss and land subsidence, with the Red Sea and Guinea Current rising fastest, according to...

www.nature.com

Reposted by Wolfgang Crämer

Valérie Masson-Delmotte @valmasdel.bsky.social · 11d

www.lemonde.fr/m-le-mag/art...

Aux Etats-Unis, les sciences du climat en voie d’extinction

Ouvertement climatosceptique, l’administration Trump sabre dans les fonds et les bourses destinés aux études et aux recherches environnementales. Sous pression de cette offensive, des étudiants et des...

www.lemonde.fr

Reposted by Wolfgang Crämer

Jens Terhaar @polarocean.bsky.social · 11d

In a recent follow-up study by @linusvogt.bsky.social (esd.copernicus.org/articles/16/...), we found that many climate models simulate too much Antarctic sea ice.

That bias can lead to underestimating future warming.

More real-world sea ice loss → more absorbed heat → stronger warming response.

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...

esd.copernicus.org

Reposted by Wolfgang Crämer

Solar Geoengineering Non-use Agreement @solargeoeng.bsky.social · 11d

'We have to face climate change' in the prism of a world 'wrecked' by conflicts and injustice - and Solar Radiation Management is not a solution for this @fabio-dandrea.bsky.social www.youtube.com/watch?v=7XmF...

'We have to face climate change' in the prism of a world 'wrecked' by conflicts and injustice

YouTube video by FRANCE 24 English

www.youtube.com

Reposted by Wolfgang Crämer, Marianne Blanchard

Christophe Cassou @cassouman40.bsky.social · 11d

"Les éléments de langage brandis à l’appui de ces reculs – lutter pour la «compétitivité» de l’Europe, sa «souveraineté», défaire la «complexité» de la réglementation, etc. – ne sont guère qu’un écran de fumée qui dissimule la vassalisation de l’Union", son trumpisme.
www.lemonde.fr/idees/articl...

« Les reculs environnementaux de l’Europe sont les premiers marqueurs de sa trumpisation »

CHRONIQUE. Les normes environnementales et sanitaires sont présentées comme une entrave aux performances de l’économie de l’UE, mais elles sont aussi l’instrument de sa puissance à l’international, es...

www.lemonde.fr

Reposted by Wolfgang Crämer

Guido Kühn @guido-kuehn.bsky.social · 12d

Energie, Digitalisierung, Mobilität—Deutschland steckt tief in einer Transformationskrise. Wer wissen wollte wie tief, sah gestern Merz den Vorgestrigen über die Zukunft Deutschlands reden. Mit diesem Kanzler hat Deutschland unter den Technologienationen bestenfalls eine Zukunft als Industriemuseum.

Illustration von Merz, der im abgedunkelten Raum auf einem Overheadprojektor ein Verbrenner-Auto, ein Atomkraftwerkmund ein Wählscheiben-Telefon malt und an die Wand hinter sich projeziert. Textzeile: Merz skizziert den technologischen Führungsanspruch DEutschlands im 21. Jahrhundert.

Reposted by Wolfgang Crämer, Olivier Mannoni

Bon Pote @bonpote.com · 14d

Un travail humain, avec des humains, pour des humains. Parce qu'elle ne permet pas un travail journalistique rigoureux, parce que c'est un désastre environnemental et un outil antidémocratique, Bon Pote s'engage à ne pas utiliser l'IA générative.
Notre manifeste à lire : bonpote.com/manifeste-ia/

Reposted by Wolfgang Crämer, Bérangère Redon

Météo-France @meteofrance.com · 15d

⛰️Journée internationale de la montagne

Tous les indicateurs d’enneigement sont à la baisse sur tous les massifs quel que soit le scénario d’émissions de gaz à effet de serre. Cependant, grandes disparités selon l’altitude, la géographie et l’exposition des pentes.

meteofrance.com/le-changemen...

dans une France à +4 °C, à l’horizon 2100 de la TRACC, la durée d’enneigement naturel moyen (hauteur de neige supérieure à 5 cm) se limitera à 1,5 à 3 mois dans les Alpes à 1800 m d’altitude et même à moins d’1,5 mois dans les Pyrénées à 1 800 m d’altitude, 1 à 2 mois dans les Vosges et le Jura, et à 10 jours dans le Massif central à 1 200 m d’altitude.

Reposted by Wolfgang Crämer

Christophe Cassou @cassouman40.bsky.social · 15d

Le modèle socio-économique responsable du changement climatique (CC) est aussi celui qui dégrade notre santé.
On ne lutte pas contre le CC "pour la planète" mais pour nous. Modifier notre système alimentaire & donc le secteur agricole est un levier majeur!
theconversation.com/aliments-ult...

Aliments ultratransformés : quels effets sur notre santé et comment réduire notre exposition ?

Mortalité prématurée, obésité, diabète, dépression, maladies cardiovasculaires, maladies de l’intestin… les preuves des effets délétères des aliments ultratransformés sur la santé s’accumulent.

theconversation.com

Reposted by Katharine Hayhoe, Valerie M. Delmotte, Sonia I. Seneviratne , and 3 more Katharine Hayhoe, Valerie M. Delmotte, Sonia I. Seneviratne, Gavin A. Schmidt, Wolfgang Crämer, Evelyne de Leeuw

Prof Friederike Otto @frediotto.bsky.social · 15d

In the world we live in today, that is 1.3C warmer due to our continued burning of fossil fuels, the extreme rainfall leading to disastrous flooding in many parts of Asia is up to 50 to 160% more intense - new @wwattribution.bsky.social study www.worldweatherattribution.org/increasing-h...

map of Sumatra and Malaysia showing heavy rainfall between November 23rd and 27th

Reposted by Wolfgang Crämer

Ketan Joshi @ketanjoshi.co · 15d

So, in this episode of @the-breakdown.bsky.social, Kim Stanley Robinson says 'no one is proposing geoengineering as a replacement for mitigation'. Lots to agree w/ KSR in this ep but this isn't right. A nice example:

bsky.app/profile/jtem...

The proprietary (and still secret) particles could counteract all the greenhouse gases the world has emitted over the last 150 years, the company stated in a 2023 pitch deck it presented to venture capital firms. In fact, it’s the “only technologically feasible solution” to climate change, the company said.

Reposted by Wolfgang Crämer

Atelier d'Ecologie Politique d'Aix-Marseille @atecopolam.bsky.social · 16d

SemEcol : Engagement des scientifiques : découplage entre savoir et agir

7 janvier 2026, 18:30, Maison des Associations, 93 la canebiere, Marseille

Conférence-débat avec Léonard Dupont, Université de Rennes

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

Scientist engagement and the knowledge–action gap - Nature Ecology & Evolution

Many scientists are acutely aware of the crises of biodiversity loss and climate change, yet this abundance of knowledge is not always coupled to action. This Perspective discusses this discrepancy an...

www.nature.com

Wolfgang Cramer @wolfgangcramer.net · 16d

"The Greenland and Antarctic ice sheets are highly vulnerable to global warming and scientists are being increasingly worried about the possibility of large parts of the ice sheets collapsing, if global temperatures keep on rising."
theconversation.com/three-things...

Three things that might trigger massive ice sheet collapse

There could be an irreversible retreat of parts of the ice sheets, raising sea levels much faster than currently planned.

theconversation.com

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