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Yves Tramblay

@yves-tramblay.bsky.social
246 followers 247 following 8 posts

Senior research scientist at IRD. Studying the climate change impacts on hydrological extremes (floods, droughts)

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Yves Tramblay @yves-tramblay.bsky.social · 16/09/2025
www.radiofrance.fr/francecultur...
radiofrance.fr
Comment l'extrême centre a mis l'extrême droite au pouvoir (en Allemagne, en 1933)
En revenant, en historien rigoureux, sur les conditions dans lesquelles Hitler est arrivé au pouvoir, Johann Chapoutot souligne les analogies avec la période contemporaine. Il est rejoint par l'écriva...
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Peter Gleick @petergleick.bsky.social · 31/05/2025
There are 2 previous historical cases of countries destroying their science and universities, crippling them for decades: Lysenkoism in the USSR and Nazi Germany. The Trump administration will be the 3rd. It's not just budgets but research, institutions, expertise, and training the next generation.
Graphs showing 25 years of budgets for the National Institute of Health, NASA, and the NSF. In all cases, the proposed budget for next year is far, far below any year of the previous quarter century.
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Thiago Nascimento @thiagovnascimento.bsky.social · 17/05/2025
In the era of large-sample hydrology, knowing where to find hydrological data is essential 🌊 🌳 🌧️ 💻 If you need hydro-climatic data for catchments in Europe, then you would like to check out the EStreams website: estreams.eawag.ch "European streamflow data and where to find them"
estreams.eawag.ch
EStreams
Comprehensive dataset of hydro-climatic variables, landscape descriptors, and a catalogue of stream records for 17,130 European catchments
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EGU Natural Hazards Division @nh.egu.eu · 27/04/2025
EGU25 is on! 🌍 Feeling overwhelmed? The Natural Hazards Division picked key events you can’t miss, but check out the program to explore all the sessions 🔥 meetingorganizer.copernicus.org/EGU25/sessio... Don't miss these events and get inspired! 💪 Stay tuned for more #EGU25 highlights! 👀
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Yves Tramblay @yves-tramblay.bsky.social · 19/04/2025
Olivier Mannoni : « De Hitler à Trump, une diarrhée verbale excluante, raciste et brutale » www.politis.fr/articles/202...
politis.fr
Olivier Mannoni : "De Hitler à Trump, une diarrhée verbale excluante, raciste et brutale"
Le traducteur de Mein Kampf d’Adolf Hitler (2021) montre, non sans inquiétude, la progression du fascisme dans le langage contemporain. Une alerte importante, alors que Donald Trump vient d’être réélu...
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Yves Tramblay @yves-tramblay.bsky.social · 13/04/2025
reporterre.net/En-Mediterra...
reporterre.net
En Méditerranée, il pleut autant qu'il y a 150 ans
Les précipitations autour de la Méditerranée sont restées stables depuis 1871, indique une étude. Mais la hausse des températures provoque des sécheresses plus fréquentes.
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Le Monde @lemonde.fr · 08/04/2025
Robert Badinter entrera au Panthéon le 9 octobre, date anniversaire de la promulgation de la loi d’abolition de la peine de mort
lemonde.fr
Robert Badinter entrera au Panthéon le 9 octobre, date anniversaire de la promulgation de la loi d’abolition de la peine de mort
L’historien et résistant juif, Marc Bloch, sera lui aussi panthéonisé, quelques mois plus tard, le 16 juin 2026, 82 ans après son exécution par la Gestapo en 1944.
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Le Gorafi @legorafi.bsky.social · 27/03/2025
Elon Musk déclare qu’il n’est pas raciste car il a un ami orange www.legorafi.fr?p=47341
legorafi.fr
Elon Musk déclare qu’il n’est pas raciste car il a un ami orange
Le proche du président américain a également expliqué que son tatouage “SS” sur le bras signifiait “Super sympa”
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Le Monde @lemonde.fr · 26/03/2025
ZFE : les députés votent pour leur suppression en commission
lemonde.fr
ZFE : les députés votent pour leur suppression en commission
Les parlementaires ont adopté des amendements LR et RN qui estiment que les zones à faibles émissions, destinées à améliorer la qualité de l’air, pénalisent les ménages les plus modestes.
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Yves Tramblay @yves-tramblay.bsky.social · 25/03/2025
Un TER région Rhône Alpes vers Grenoble qui ressemble franchement à un train corail d'il y a plusieurs décennies... Rappelez moi qui est le président de région ?
Vieille banquetteVieux wagon
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Wolfgang Cramer @cramer-bondeau.fr · 22/03/2025
J'ai modifié mon kit de démarrage destiné aux scientifiques francophones spécialistes du climat, de la biodiversité et de l'environnement en déplaçant les communicateurs et les institutions vers un autre kit. Si vous pensez que je devrais vous inclure, faites-le moi savoir ! go.bsky.app/LjZgnPy
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Bon Pote @bonpote.com · 23/03/2025
Le réchauffement climatique à 29€. Tellement ras le bol de voir des pubs pareilles en 2025. Et dans une gare SNCF en plus.
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Marshall Shepherd @drshepherd2013.bsky.social · 22/03/2025
The So What's of Climate Change. We all eat. Oh and when supply decreases, guess what your grocery bill does. @carbonbrief.org
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David Ho @davidho.bsky.social · 16/03/2025
Estimated number of people who could die within a year without American foreign aid for: H.I.V. prevention and treatment: 1,650,000 Vaccines: 500,000 Food aid: 550,000 Malaria prevention: 290,000 Tuberculosis prevention: 310,000
nytimes.com
Opinion | Musk Said No One Has Died Since Aid Was Cut. That Isn’t True. (Gift Article)
A journey through the front lines of global poverty shows that when the world’s richest men slash aid for the world’s poorest children, the result is sickness, starvation and death.
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Nature Portfolio @natureportfolio.nature.com · 13/03/2025
Precipitation in the Mediterranean region has remained stable, despite variation across years and decades, according to an analysis in Nature of historical trends from 1871 to 2020. go.nature.com/43F4aom 🧪
This is figure 1, which shows spatial distribution of annual precipitation trend in different analysed periods.
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Erich Fischer @erichfischer.bsky.social · 13/03/2025
Can climate models reproduce observed trends? The answer can be challenging. Our new review paper in Science Advances led by Isla Simpson and Tiffany Shaw @drshaw.bsky.social discusses challenges and ways forward in confronting climate models and observations. www.science.org/doi/10.1126/...
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Sergio Vicente @sergio-vicente.bsky.social · 12/03/2025
Check our article that analyses the dynamic of Mediterranean precipitation using a long-term and high-density database of meteorological stations. www.nature.com/articles/s41...
nature.com
High temporal variability not trend dominates Mediterranean precipitation - Nature
Our assessment of a 27-country weather station dataset in the Mediterranean region revealed long-term stability in precipitation over 150 years, along with substantial short-term variability on annual...
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Nature Portfolio @natureportfolio.nature.com · 09/03/2025
A study in Nature Food assesses the future climatic suitability of global croplands for 30 major food crop types, quantifying the changes in potential food crop diversity given climate conditions across four global warming levels. go.nature.com/3Dp5LEk #foodstudies 🧪
This is figure 1, which shows the lowest global warming level that would push current crop production into considerable risk.
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Nick Haddad @nickhaddad.bsky.social · 06/03/2025
Our paper is out, and it is distressing. Rapid butterfly declines across the United States during the 21st century | Science www.science.org/doi/10.1126/...
science.org
Rapid butterfly declines across the United States during the 21st century
Numerous declines have been documented across insect groups, and the potential consequences of insect losses are dire. Butterflies are the most surveyed insect taxa, yet analyses have been limited in ...
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Yves Tramblay @yves-tramblay.bsky.social · 04/03/2025
A Web service to provide easy access to climate data in the Global South (subtitles in English, Spanish, Portuguese, Arabic) youtu.be/mResFCRdzik?...
youtu.be
Climatsuds, un portail innovant qui simplifie l'accès aux données climatiques.
YouTube video by IRD
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Valérie Masson-Delmotte @valmasdel.bsky.social · 24/02/2025
Come together, right now | Science www.science.org/doi/10.1126/...
science.org
Come together, right now
The chaos, conflicting information, firings, and hurtful rhetoric of the Trump administration’s approach to science over the past month are causing anxiety, grief, and concern for the scientific commu...
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Le Gorafi @legorafi.bsky.social · 24/02/2025
Doutant des capacités de Dieu, le Pape s’en remet à l’hôpital pour le guérir www.legorafi.fr/2025/02/24/d...
legorafi.fr
Doutant des capacités de Dieu, le Pape s’en remet à l’hôpital pour le guérir
Malgré sa foi qu’il jure inébranlable, le Pape a tout de même préféré faire confiance aux médecins pour soigner sa pneumonie, “au cas où”.
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Tania Louis @tanialouis.fr · 24/02/2025
Un bilan des actions anti-science du premier mois de mandat de Trump : www.scientificamerican.com/article/trum...
scientificamerican.com
Science under Siege during Trump’s First 30 Days
The Trump administration has acted fast to attack science with a range of funding and policy tactics
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Marine Tondelier @marinetondelier.fr · 24/02/2025
Il n'y aura pas d'avenir pour l'agriculture sans respect de l'écologie. Quand il n'y aura plus d'eau, que les sols seront inutilisables et qu'on aura pollué tout notre environnement, que ferons-nous ? En défendant la nature, nous défendons l'outil de travail des agriculteurs.
youtube.com
"Il n'y aura pas d'avenir pour l'agriculture sans écologie" Marine Tondelier sur France 3
YouTube video by Europe Écologie Les Verts
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Yves Tramblay @yves-tramblay.bsky.social · 24/02/2025
An interesting analysis showing that the further to the right the 'Republican' parties aim to steal far-right voters, the more legitimized and favored the far-right vote becomes. Pyromaniacs.
theguardian.com
‘Vicious cycle’: how far-right parties across Europe are cannibalising the centre right
Hardline agendas, especially on immigration, are copied by mainstream conservatives in vain effort to win back votes - but it’s not working
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Prof Julia Steinberger 🌹🌱🌍 #ClimateAction #Fightfascism @jksteinberger.bsky.social · 23/02/2025
As promised, here are the slides I shared with students to convince them to NOT use chatGPT and other artificial stupidity. TL;DR? AI is evil, unsustainable and stupid, and I'd much rather they use their own brains, make their own mistakes, and actually learn something. 🪄
NO CHATGPT Or other artificial stupidity: motivation
First, clarity on distinguishing AIs:
Non-generative: grammar aid, translation, dictionary, text-to-audio (e.g. Natural Reader): no problem
As long as you use the appropriate tools (least intensive in data and server energy use).
Why? Because you provide the content. Your brain is doing the most important work
Generative: ChatGPT & Co. 
You only supply the prompt, the AI supplies the content.
Why is this delegation of work problematic?
3 domains: ethical, environmental, intellectual engagement.

(Caveat: generative is probably ok for computer programming, where it can be useful and save time. Not relevant to this class.)
1) AI and ethics
Mass theft of all and everything
«learning» on books, articles, blogs, social media, images, music, cultural production, without  permission of authors/creators, and leading to their mass joblessness. Profits are not reditributed to originators. 
Permanent destruction of the mental health of underpaid precarious tech workers in the Global South (Kenya, Philippines …):
«correction» to avoid production of violent and pedophile contents etc, tech workers are obliged to watch and correct super violent contents for days on end, leading to extreme psychological suffering and trauma, from which recovery is doubtful. No or little compensation (certainly not at the level of the suffering inflicted). 
In short, an industry built on theft of real human creation and sacrifice of real human health, profiting a few megafortunes. 
2) AI and (un)sustainability

Massive consumption of electricity, water, server capacity for generative AI. 
Outcome: keep fossil fuel companies in business, using up new renewable capacity, without any satisfaction of basic human needs.
Massive misappropriation of the finance necessary for climate and ecological action (renewable generation, efficiency and retrofit for buildings, public transit, infrastructures for cycling etc) towards AI industry. 
Overall: undermine climate action, reinforce fossil industry, waste resources necessary for human development. 
3) AI and intellectual engagement

First, what learning is (or should be) about:
The goal should not (only) be the reproduction of «correct» knowledge,
But mainly personal engagement and experience of thinking about topics of interest. Personal engagement = using one’s own brain. 
The most important activity for learning and intellectual engagement is the experience of making one’s own mistakes, by trial and error, corrections based on new ideas, starting over again. Learning to recognise nuances, knowledge gaps, better explanations 
This kind of learning is possible only through using your own brain, not AI. 
Also, Ais are not «intelligent». At all. 
They simply reproduce pre-existing patterns. They «bullshit», invent false references, false facts, false data, simply because those sound plausible. VERY DANGEROUS. 
If you learn how to NOT use AI, and how to research facts and data on your own, this will serve you and your communities for the rest of your life.
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Wolfgang Cramer @cramer-bondeau.fr · 21/02/2025
Press Release by the French Academy of Sciences: "Threats to science and scientific research, withdrawal of US aid to international organizations" www.academie-sciences.fr/en/node/2661 www.academie-sciences.fr/sites/defaul...
press release cover with US flag
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William Colgan @glacierbytes.bsky.social · 19/02/2025
The Glacier Mass Balance Intercomparison Exercise is out! Herculean effort bringing together >200 estimates of glacier loss outside the ice sheets. Bottom line is 273 gigatonnes per year of ice loss since the year 2000! 😲 Open-access article: doi.org/10.1038/s415... 🥼❄️ @natureportfolio.nature.com
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Prof Christina Pagel @chrischirp.bsky.social · 13/02/2025
🧵"So this is how liberty dies..." Trump’s first 3 weeks have been a relentless flood of actions. It's incredibly hard to keep up. I’ve gone through 69 actions & mapped out the pattern - showing how they fall within 5 broad domains consistent with authoritarian states 1/9
This is a venn diagram showing how 69 Trump actions map onto domains covering: undermining democratic institutions; suppressing dissent and media; dismantling social protections; attacking science and education; destabilising the global order. A table version is available here https://docs.google.com/spreadsheets/d/1LZN7QnbSyFfUZJG8Sn1MWpK0VnfBtb0OSyZ1jxP3xBk/edit?usp=sharing
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Torsten Lütten @torstenluetten.bsky.social · 15/02/2025
Meanwhile, in 🇺🇲
Stand your ground, defend and strengthen democracy
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AGU (American Geophysical Union) @agu.org · 14/02/2025
AGU stands with federal scientists. Read more on fromtheprow.agu.org/standing-tog...
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Yves Tramblay @yves-tramblay.bsky.social · 02/02/2025
Scary.
open.substack.com
BREAKING NEWS: CDC orders mass retraction and revision of submitted research across all science and medicine journals. Banned terms must be scrubbed.
Any unpublished manuscript mentioning certain topics, including gender and "LGBT," must be pulled or revised.
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Valérie Masson-Delmotte @valmasdel.bsky.social · 26/01/2025
* Littoral méditerranéen toujours + vulnérable * Stratégies et actions, pas à la hauteur des enjeux de vulnérabilités * Choix d'aménagement et financements à repenser www.ccomptes.fr/fr/publicati...
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Ketan Joshi @ketanjoshi.co · 26/01/2025
There is a reason these guys go after attribution science: it draws in thick, loud marker the connection between catastrophe and fossil fuel reliance. What they want is a discourse where the rising drumbeat of disasters remains broadly disconnected from its cause
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Brad Johnson @climatebrad.hillheat.com · 23/01/2025
What will come after the cancer stage of capitalism? There are scientists envisioning a brighter future
thelancet.com
Post-growth: the science of wellbeing within planetary boundaries
There are increasing concerns that continued economic growth in high-income countries might not be environmentally sustainable, socially beneficial, or economically achievable. In this Review, we expl...
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Bon Pote @bonpote.com · 17/01/2025
Les sénateurs ont voté la baisse de plus d'un tiers de l’aide publique au développement. 800 millions en moins. Cette aide au développement aide les pays du Sud à faire leur transition écologique et renforcer nos liens avec eux. La France a définitivement perdu la face.
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Zeke Hausfather @zekehausfather.com · 15/01/2025
I have a new paper in Dialogues on Climate Change exploring climate outcomes under current policies. I find that we are likely headed toward 2.7C by 2100 (with uncertainties from 1.9C to 3.7C), and that high end emissions scenarios have become much less likely. journals.sagepub.com...
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Wolfgang Cramer @cramer-bondeau.fr · 15/01/2025
Très fier que @ldh.fr a pris cette initiative pour abandonner X.
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Eric Lagadec @ericlagadec.bsky.social · 13/01/2025
Mais c'est quoi Starlink? C'est des satellites en orbite basse. Au lieu d'utiliser des satellites géostationnaires à 36000km (avec de la latence due à la vitesse finie de propagation de la lumière), on les mets à~500km. Comme ça on s'envoie des vidéos de chats plus rapidement!
media.tenor.com
two cats are playing in a cardboard box and the caption says " cat fun "
ALT: two cats are playing in a cardboard box and the caption says " cat fun "
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David Ho @davidho.bsky.social · 14/01/2025
👀
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Jeffrey Perkel (he/him) @jperkel.bsky.social · 14/01/2025
Relevant to this audience! @nature.com asks: “Has Bluesky replaced X for scientists? Take Nature’s poll”: www.nature.com/articles/d41... 🧪
nature.com
Has Bluesky replaced X for scientists? Take Nature’s poll
The research community has flocked to the social-media platform Bluesky. Tell us about your experience.
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Daniel Swain @weatherwest.bsky.social · 14/01/2025
Our recent review on "Hydroclimate Volatility on a warming Earth" will be in front of the journal paywall for all to read/download freely for 14 days (until 1/23). Thereafter, this specific (ReadCube) link will grant read-only access to all: rdcu.be/d6ceH
rdcu.be
Hydroclimate volatility on a warming Earth
Nature Reviews Earth & Environment - Rapid transitions between extreme wet and extreme dry conditions — ‘hydroclimate whiplash’ — have marked environmental and societal...
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William Reymond @williamreymond.bsky.social · 07/01/2025
🇫🇷 Libé et l’Huma à la hauteur de l’info
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Zeke Hausfather @zekehausfather.com · 06/01/2025
Good Nature piece on the debate about accelerating warming in recent years, and what exceptionally high 2023 and 2024 temperatures might mean: www.nature.com/artic...
nature.com
Earth shattered heat records in 2023 and 2024: is global warming speeding up?
Nature - Nature examines whether the temperature spike is a blip or an enduring — and concerning — trend.
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Gonéri Le Cozannet @goneri76.bsky.social · 06/01/2025
Gray lobby expenditures exceed those of Green lobby by 1 to 2 orders of magnitude. "This additional financial power translates into a superior ability to organize policy events, commission policy briefs, lobby MEPs or the commission directly, participate in public consultations, etc (...)"
Figure showing that the Green lobby has very small financial means compared to the Gray lobby - source in the paper cited above in the thread
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Yves Tramblay @yves-tramblay.bsky.social · 05/01/2025
Check out this new EGU 2025 session about Water in Drylands, abstracts submission deadline is January 15: meetingorganizer.copernicus.org/EGU25/sessio...
meetingorganizer.copernicus.org
Session HS2.1.4
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Michael E. Mann @michaelemann.bsky.social · 10/12/2024
Global sea surface temperatures are at their lowest since June 2023 as weak La Nina-like pattern persists. However, we didn't see the greater cooling expected from what was predicted to be a more substantial La Nina event. The problem remains the steady long-term warming! pulse.climate.copernicus.eu
plot of sea surface temperature trend over past two years and current pattern
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Audrey Garric @audreygarric.bsky.social · 10/12/2024
Les émissions mondiales de CO₂ liées au tourisme ont progressé de 3,5 % par an entre 2009 et 2019, plus du double du reste de l’économie. Elles représentent 9 % des émissions mondiales. En cause : la hausse de la demande (surtout USA, Chine, Inde) et l’aviation www.lemonde.fr/planete/arti...
lemonde.fr
Les émissions mondiales de CO₂ liées au tourisme s’envolent, causées par une poignée de pays
Les émissions de gaz à effet de serre liées au tourisme représentent près de 9 % du total mondial, selon une étude publiée mardi dans « Nature Communications ». Ses auteurs mettent en garde contre cet...
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