This is really the key graphic that I think tells the story best: it's the amount of projected warming for each year's analysis Things really did get better after the Paris Agreement. But it has stagnated post-covid, and we could backslide...... climateactiontracker.org/publications...

@aliduffey.bsky.social and I have a new response to the Siegert et al piece on geoengineering published as a commentary in Frontiers (the online version is now properly edited with the figure).

Always my fav chart from the GCB, and here's the 2025 update. It lays out what we've avoided, what we've failed to avoid, and what's at stake if we let the future slip We are not on a good trajectory, and slipping back into a worse trajectory is always possible. But: we know it bleeds

Good thread from Dave about the new IEA "Current Policies Scenario" making a lot of the headlines. Here is a very quick mock-up I made of what this scenario assumes for solar PV additions through to 2035, with historical context. I'll let you decide whether this seems likely.

Over 45 members of DSG’s Climate Intervention Network gathered in Helsinki for two days of learning and connection. The interdisciplinary group engaged in futures-thinking workshops, discussed research’s governance and decolonization, and also attended Operaatio Arktis’ ATLAS25. Enjoy some photos!

And they have raised a further $60M... www.politico.com/news/2025/10...

I am proud to be on the Working Group for this Royal Society report. We can no longer exclude the possibility of devastating climate impacts even under ambitious emission mitigation scenarios. Thus, given that SRM is the only way to reduce temperatures on a short timescale, ...

In an op-ed for TR, @davidkeith.bsky.social & @danvisioni.bsky.social voice deep concerns about Stardust & other for-profits racing into solar geoengineering — and asserting claims that, they argue, the science doesn't support.

Lovely! (Check out the replies!)

I’ve never been shy nor ashamed of the fact that the core of my research is around SRM. I think there is merit in research: if we can show there are ways to ameliorate current and future climate change, we should know. If there aren’t, or if SRM could be used to make things worse, we should know.

Interesting new paper from Exeter colleague Jim Haywood, and previous @exeter.ac.uk PhD student Alice Wells about geoengineering - specifically what would sulphate aerosol injection do with respect to high levels of global warming 1/2. agupubs.onlinelibrary.wiley.com/doi/full/10....

British.

Zack Polanski is the Mamdani of the UK - and he's Green! www.youtube.com/watch?v=qxt4...

Stormy weather = cleaner grid!

If you want something to lift your spirits about how cool science can be, then I would recommend watching Good Night Oppy. www.youtube.com/watch?v=ggRJ...

i challenge you to find cooler news today than “despite all odds against American scientific research rn, a CO researcher developed a temperature-stable, single dose rabies vaccine that works bc of particles coated in CANDY & SAPPHIRE, & it could help reduce rabies deaths in places w/o electricity”

I have a new @nytimes.com guest essay w/ @davidkeith.bsky.social about sunlight reflection. We note its not a solution for climate change and at best a band aid to treat systems, and suggest if its ever done it should only be to replace the cooling from air pollution today:

Dakota Gruener and I have a new piece out in the new issue of @worksinprogress.bsky.social : worksinprogress.co/issue/sunscr...

Beautifully illustrated and clear write-up on SRM by @danvisioni.bsky.social and Dakota Gruener. worksinprogress.co/issue/sunscr...

Our 20th 🥳 set of SRM talks is on the 26th September! Check out sites.google.com/view/solarge... for recordings of previous talks and link to sign up to the mailing list.

Royal Society president Sir Adrian Smith: “I am sure that many of you will share my concern at the events of the last week and the growing tendency to resort to the language of violence…including, unfortunately, an address to the recent London rally from a Fellow of the Royal Society.”

Fascinating job opportunity at ARIA. Leading public engagement for the climate innovation programme aria.pinpointhq.com/en/postings/...

BREAKING: At least 59 Palestinians have been killed in Israeli attacks across Gaza since dawn today, medical sources have told Al Jazeera. 🔴 LIVE updates: aje.io/kz2du2

A really excellent response to the Siegert et al piece from Operaatio Arktis, please give it a read! www.operaatioarktis.fi/kirjoituksia...

Who would have guessed that putting together your own group of people to write an "assessment" with the specific goal from the beginning to come out with a specific set of conclusions, cherry-picking data, highlighting uncertainties to imply there is no understanding, ...

More seriously though, it's perhaps a good thing that more scientists are thinking about climate interventions. Ultimately, the more people get involved, the better our collective answer to whether or not we should intervene will be. However, we have to be rigorous in our assessments.

🌍📢 Calling all emulator / reduced-complexity / simple climate modelling groups! The next round of the Reduced Complexity Model Intercomparison Project (RCMIP) is starting, and we’d love your feedback.

At the Arctic Repair Conference, Anni Pokela made the case for urgent, responsible #climate intervention research. Her perspective here: buff.ly/SAdMwvn #SolarGeoengineering #SunlightRefllectionMethods

Is this a crisis or not? Are tipping point risks serious or not? Net zero is non-negotiable, but climate impacts are here, and all plausible emissions scenarios see us pass 1.5C. If now is not a reasonable time to explore radical ideas, when would be?

Why is this so important? It means that our emissions today will not just affect our generation, but countless generations to come. And the only way to permanently cool the planet back down once we stop emissions is to take that CO2 back out of the atmosphere.

While trying to escape from work deep in the Algarve, I was walking around a night market when I overheard an Englishman talking to a merchant selling artisanal soaps. "Chemtrails", he said, "they're spraying the skies with aluminium. It's geoengineering, they want to reflect the heat."

Our paper exploring in depth the potential response of the Atlantic Meridional Circulation (AMOC) to Stratospheric Aerosol Injections led by Ewa Bednarz at NOAA CSL is now available online! Check out the paper here: agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Shocking stats from this paper on the extreme 2024 summer heat in Arctic Svalbard, which lost 1% of its total ice volume in just ~6 weeks. 🔥 In fact, Svalbard's 2024 glacier mass loss actually exceeded that of the Greenland Ice Sheet, which is 50 times larger!!! 😱 www.pnas.org/doi/10.1073/... ❄️🧪🌊

The great and good Steve Shapin was very entertaining on this when he reviewed Michael Gordin's "The Pseudoscience Wars: Immanuel Velikovsky and the Birth of the Modern Fringe" in the LRB some years ago (cc @tamarhaspel.bsky.social) www.lrb.co.uk/the-paper/v3...

Excited to see our paper published in ACP! "Building a comprehensive library of observed Lagrangian trajectories for testing modeled cloud evolution, aerosol–cloud interactions, and marine cloud brightening" acp.copernicus.org/articles/25/... #DiscoverDRI #aerosol #cloud #LES #EGU #Copernicus #ACP

Temperature anomalies (departure from average) around our planet for the last month (left), 3 months (center), and 12 months (right)... note the band of warmth across the Northern Hemisphere midlatitudes. Data from doi.org/10.24381/cds...

NEW ANALYSIS: Wildfires have already scorched a UK-record land area in 2025, double the previous high – and 4x above average By Orla Dwyer, Ho Woo Nam + Tom Prater www.carbonbrief.org/...

if you're interested in climate risk and private sector climate risk vendors, this is worth reading. also, fantastic name for a newsletter. letsgetgeophysical.substack.com/p/buyer-bewa...

The deadline for abstract submission is approaching!

The early indications are that these could be substantial emissions sources, which will accelerate warming:

July has been a warm month, sunnier than average and a bit drier than average. Summer is continuing the warm trend from Spring. Here is a climate/weather summary for the past year. #dataviz #climatchange #globalwarming

😂😂😂

⏳Final week to sign up to the Green Party. 🗳️ Vote for Bold Leadership on August 1st.

The deadline for abstract submission is approaching!

The content is good, but this is such a Daily Mail headline! 😅

The future of the AMOC is one of the most urgent — and uncertain — questions in climate science. In this new Met Office video, I share insights from our Nature paper on how Southern Ocean winds may help prevent an AMOC collapse as the planet warms 🎥 🌊

This was a really fun read, excellent use of memes!:)

Under climate change, the polar regions warm *faster* than the rest of the world ("polar amplification", PA). But, is this always the case? In this preprint (with Tim Merlis) we studied the 'state-dependence' of PA—feedback welcomed! :) andrewilwilliams.github.io/papers/pa_widerange_main.pdf

Even ☁️Birmingham☁️ is on 62%! 😅🤯