David Spratt

Authoritarianism is undermining #climate action – and time is running out as warming accelerates and tipping points draw near. But as globalisation fades, national governments must assert their role in leading a climate emergency response: johnmenadue.com/post/2026/02/c… @johnmenadue. Briefing paper: breakthroughonline.org.au/_files/ugd/148… @BreakthroughCCR

'By late this century, more than 50 percent of humanity could be exposed to life-threatening heat and humidity. But one of climate change’s deadliest emerging risks remains poorly understood: lethal humidity,' writes Robert Glasser. aspistrategist.org.au/lethal-humidit…

@RogerHallamCS21 Trouble is you have ignored a basic scientific understanding of warming - thermal inertia, so none of those figures stack up.

A key problem of scientific understanding: it requires slicing reality into manageable chunks. Take "the doubling of CO2." The slice aids understanding — but paradoxically kills it too. Attending to the part deflects attention from the whole. Space. Time. The full arc of what's coming. So when Hansen and colleagues write: "climate sensitivity for doubled CO2 is 4.5°C ± 0.5°C... Climate sensitivity as low as 3°C is excluded with greater than 99 percent confidence" — they stop there. Slice completed. No return to the whole. No wonder the media shrugs. "So what." Here's the whole: 1. Doubling CO2 means going from 280ppm to 560ppm. We're at 420ppm now. At current trajectory — roughly 40ppm additional per decade — we hit 560ppm around 2055. That's 4.5°C by roughly 2060. Hansen also shows Earth's albedo has already darkened by 0.5% — an extra 1.7 W/m² of absorbed solar energy. The system is already running hotter than the models admit. 2. Time doesn't stop at 2060. At those temperatures, natural feedbacks — clouds, ice, permafrost — accelerate. There is no equilibrium. There is only continuation. 3. Above 5°C, effective human extinction is locked in. We are on that path. 4. Facts alone don't move humans. Emotion does. We are human, after all. So the headline that would actually communicate the whole truth? "We are all going to die, you f**king idiots." That's not hyperbole. That's the science, unsliced.

The 2026 budget speech was titled ‘Resilience and reform’. ‘Resilience’ – a very fluid term favoured by political communicators these days – was deployed 13 times, but the word ‘#climate’ failed to appear even once. Here's why: pearlsandirritations.com/post/2026/05/t…

At a time of increasing need for decent #climate modelling, what does the government do? Reduce it of course. Can't tax gas companies to raise revenue I suppose? theconversation.com/csiro-is-cutti…

Apple has published a paper with a devastating title: “The Illusion of Thinking” It argues that AI models, no matter how brilliant they may seem, do not understand what they are doing. They do not solve problems. They do not reason. They merely generate text word by word, trying to sound coherent. Apple tested the most advanced reasoning models in the world on controlled puzzle environments. They tore open the internal "thinking" traces. What they found shatters the narrative that we are getting closer to AGI. Current models don't scale with complexity. They have a hard mathematical cliff. And they do not degrade gracefully. They collapse. But here is the most unsettling part. When a problem gets too complex, the AI doesn't use its remaining compute to try harder. It just gives up. Its reasoning effort actually declines. It stops thinking and starts guessing. Then Apple ran the experiment that closes the casket on the reasoning debate. They gave the AI the exact, step-by-step algorithm to solve the puzzle. The cheat codes. All the AI had to do was follow the instructions. It couldn't do it. Performance didn't improve at all. When the complexity gets high enough, these models fail because they cannot actually execute a logical sequence. They are not reasoning. They are just pattern matching. When you give them a simple problem, they overthink. When you give them a hard problem, they collapse. Paper: The Illusion of Thinking, Apple, 2025

Audio up! New article on Thwaites Glacier in Antarctica today claims that the ice shelf is deteriorating much faster now leading the team at the British Antarctic Survey to write an obituary for it. These quotes sound alarming, and they are. But deep in the article they mention that this is a “gradually developing crisis rather than an immediate emergency.” Still with comments like this from scientists it’s a good reminder that a whole lot of ice and sea level is sitting behind very fragile ice shelves at the bottom of the World! "Suddenly, large areas are just falling to pieces," says Christian Wild, from the University of Innsbruck in Austria. "It looks like a windscreen that's shattering." “Massive cracks have emerged around the pinning point, where an underwater ridge once anchored the floating ice in position.” "It's essentially in free fall now," says Mr Wild, noting the pace has quickened further over the past five months. “Fresh rifts have appeared along the grounding line, where the glacier transitions from land to floating ice.” Here’s a video I made explaining the ice shelf holds back the Glacier and how the grounding line is destabilizing. Audio up! Article in thread… 1/

New ECMWF data shows near a 100 percent chance of a super El Niño by October. The central equatorial Pacific is forecast to surge 2.7˚C above average by then — approaching record levels — and this major climate event will still be intensifying 🧵

Researchers at EPFL proved your AI is lying to you. Not sometimes. Most of the time. They built one of the hardest hallucination tests ever made with Max Planck Institute. 950 questions. Four domains where being wrong actually hurts. Legal. Medical. Research. Coding. Then they ran every top model on it. The results. GPT-5. Wrong 71.8% of the time. Claude Opus 4.5. Wrong 60% of the time. Gemini 3 Pro. Wrong 61.9% of the time. DeepSeek Reasoner. Wrong 76.8% of the time. These are the smartest AI models on Earth. The ones you trust with your career. Your health. Your money. You think turning on web search fixes it. It doesn't. Claude Opus 4.5 with web search. Still wrong 30.2% of the time. GPT-5.2 thinking with web search. Still wrong 38.2% of the time. The internet attached. Still lying to you in 1 out of every 3 answers. Now the part that should scare you. Medical questions. The one place being wrong can kill you. GPT-5 hallucinated 92.8% of the time on medical guidelines. Claude Haiku 4.5 hallucinated 95.7% of the time. Gemini 3 Flash hallucinated 89% of the time. Nine out of ten medical answers from popular AI models. Wrong. It gets worse. The longer you talk to it, the more it lies. Early mistakes cascade. The model starts citing its own earlier hallucinations as facts. Your third message is more wrong than your first. The paper, in its own words: "hallucinations remain substantial even with web search." This is what hundreds of millions of people are doing right now. Asking software that lies in the majority of its answers. About their health. About their job. About their legal case. About their code. Most are not checking. Most never will. But please. Keep using ChatGPT for medical advice. The doctors need a break. arxiv.org/abs/2602.01031

@RogerHallamCS21 @DrJamesEHansen Last 3 years average above 1.5C. So will next two, likely hottest yet. Yet mainstream climate movement ignores this basic science and carries on about “keeping 1.5C alive”. Triumph of belief and denial over evidence.

"Even a moderately strong El Niño during the next 12 to 18 months could drive the average global temperature to about 1.7 degrees Celsius above the preindustrial level, climate scientist @DrJamesEHansen told Inside Climate News. Hansen doubts the world will meaningfully cool back down to below the 1.5 degree Celsius mark after the El Niño fades."

@ProfSteveKeen It’s not just supply, but price where cost makes crop uneconomic. And in northern hemisphere the spring planting window is closing/closed.

The modern economy runs on just-in-time delivery, from factory parts to fertilizer, and that system has been badly disrupted by the conflict in the Strait of Hormuz. If fertilizer does not reach farms before spring planting, global food production could fall sharply, with the worst effects hitting countries that depend on imports and have little reserve stock. This is not just a financial problem, because when physical supply chains break, food shortages and broader instability can follow. Check out the comment section to see my complete analysis on this situation.

A physics-based analysis concludes that this year will be the warmest, not second warmest. In any case, we can learn something about climate change. See 2026 On Track for Warmest Year – mailchi.mp/caa/2026-on-tr… Also available on Substack: jimehansen.substack.com/p/2026-on-trac…

The latest CFS forecasts for El Niño need no hyperbole or exaggeration. The traditional Nino 3.4 region might actually be +3.4°C lol - I can’t tell because some of the members and also the mean are literally off the chart. The RONI.. newer “relative” index - which takes our warmed climate into account - is like 2.7 which would be close to a record (if averaged over 3 months). The current record is +2.5°C in 1982-83. The original index is good to look at for comparison sake. But the Relative index will give us a better idea of the impacts of the event. That’s because El Niño is most impactful when its anomalies are the highest compared to other adjacent regions/ basins. In 2023 there was a strong-ish El Niño but the Atlantic was also warm, diluting the El Niño impacts and allowing major hurricane Idalia to form in the Gulf.

Any sane foreign policy would put climate risks, not China, at centre stage johnmenadue.com/post/2026/04/a…

Any sane foreign policy would put climate risks, not China, at centre stage. Australia’s security policy settings are focused on geopolitical rivalry, while far greater systemic risks – especially climate disruption – receive little strategic attention. johnmenadue.com/post/2026/04/a…

Former defence leaders outline already-present fossil fuel dependence, climate disinformation threats abc.net.au/news/2026-03-2…

The development of El Niño has progressed rapidly. Waters in the subsurface Pacific Ocean have now reached a gaudy 6˚C (11˚F) above average. This warmth is rising toward the ocean's surface and aligns with projections of a super El Niño later this year.

With the latest set of El Niño forecasts, NOAA's CFSv2 model needs to get a larger y-axis scale 😯 cpc.ncep.noaa.gov/products/CFSv2/

Defence Strategy fails to face reality. The strategy is overly focused on near-term capability spending and avoids confronting the deeper, systemic threats. Read the full story: canberratimes.com.au/story/9225746/…

Energy security is now inseparable from national security. Australia has options, but they’re being neglected. SMH op-ed by Admiral Chris Barrie & Ian Dunlop. smh.com.au/national/energ…

AMOC slowdown has profound global #security consequences but I feel 100% confident it will not rate a mention Australia’s new defence strategy to be released today. @aslcg_org