Matthew Henry

NEW ANALYSIS: UK emissions fell 2.4% in 2025 as coal fell to a 400-year low. Incredibly, we used less coal last year than than in 1600, when Queen Elizabeth I was on the throne and Shakespeare was writing Hamlet.

All the details in our article: www.carbonbrief.org/...

Reflective | Radically Accelerating the Pace of Sunlight Reflection Research We equip the world with the data and tools needed to make informed decisions about sunlight reflection, fast enough to matter.

On Friday, I'm talking with the head of Reflective, a nonprofit trying to accelerate the responsible research of solar radiation modification (SRM), ie, blocking some sunlight from reaching earth in order to cool the atmosphere. Geoengineering!

Got questions?

Also, yes, we did it! Boys just need to have fun sometimes, and thanks for the reviewers for being game (one of them did complain you do not “brew” CIDER so we had to rename one of the sections…)

A Climate Intervention Dynamical Emulator (CIDER) for scenario space exploration Abstract. Stratospheric Aerosol Injection (SAI) is a form of proposed climate intervention to reflect incoming solar radiation, offsetting some of the impacts of greenhouse gas warming. Due to the cha...

gmd.copernicus.org/articles/19/...

We’ve been working for a few years now on a regional emulator capable of exploring different SRM strategies, capable of expanding the exploration space beyond the small set that Earth System models can provide. It’s here now! Presenting CIDER ➡️

Fair enough, solid group!

Maybe something on tipping elements, not sure I have a good non-review paper for that though. Mostly here to ask to share the final list!:)

I am running a Climate Dynamics reading group for UCI graduate students this Spring and would like to propose a list of accessible papers on "big ideas" in climate dynamics from the 21st Century, prioritizing primary sources over review papers.

Any suggestions of papers? (Self-promotion welcome!)

YouTube video by SRM360 Live Discussion: How Might Solar Geoengineering Affect Global Security?

Discussion (24 Feb 2025) on the geopolitical and #security risks of climate change and solar #geoengineering #SRM

youtu.be/FeVWK48Y0e0?...

Not saying I like the lib dems, but as someone who lives somewhere with a serious tipping/littering issue, I'd vote for that policy...

Things should clear up for the morning commute once silicate weathering has been shut down for long enough that slowly accumulating volcanic CO2 catastrophically deglaciates the entire planet

Ice, ice, maybe: should the Arctic be refrozen? Also on the daily podcast: the staggering boom in India’s gig economy and the first social network for AI agents

On “The Intelligence” Oliver Morton and Catherine Brahic discuss a wild idea that is attracting ever more attention: using geoengineering to refreeze the Arctic. Listen now

I've even made my own version of the iconic Joy Division-style daily anomaly plot thats updated with 2026 data (to-date): dashboard.theclimate...

I've seen several Big Climate Accounts™ post about how the recent winter storm was made worse by climate change. It's a convenient narrative.

s
But what is "worse"? Colder temperatures? More snow? More freezing rain? Is there any primary literature supporting the idea of worse snowstorms?

1/

A reminder that this is on at 3pm UTC today, DM for the zoom link if you don't have it.

Great article, and thank you for highlighting the Arctic MCB work!

D & A style attribution with fair and HadCRUT5 updated to 2025 (emissions extrapolated beyond 2022, but should make little difference)

[code: github.com/chrisroadmap...

Radiative forcing geoengineering under high CO2 levels leads to higher risk of Arctic wildfires and permafrost thaw than a targeted mitigation scenario - Communications Earth & Environment Stratospheric aerosol injection, marine cloud brightening, and cirrus thinning are less effective in cooling the Arctic than the globe and may lead to increased risk of wildfires and permafrost thawin...

The title has been corrected. www.nature.com/articles/s43...

"touché par des tirs" is the new "assassiné"

Help us make hope normal again.

Join the Green Party now.

A time series of the January–February frequency (in days) of the AKR regime from 1979 to 2025 using ERA5 data, based on the year-round classification of Lee et al. 2023 (J. Climate) updated through 2025.

The extreme cold across eastern N America is due to the Alaskan Ridge regime, which on average brings the coldest winter weather to this region.

Is this happening more often?

No. During the modern warming era, there has been no observed trend in the occurrence of this regime at this time of year.

On the balance of probabilities those warning of disaster look much more likely to be right than those complacently arguing there is nothing to worry about. Even the spooks are worried, and they are right to be.

Suppressed climate report warned of mass migration and nuclear war Unabridged document said disappearing forests and rivers drying up could drive people to Europe and lead to conflict in Asia

Back in the Autumn, No.10 blocked the publication of a report into the risks the UK could face if climate change causes ecosystems around the world to collapse. On Tuesday, after an FOI request, it published the report. But it turns out, that wasn't the full version. www.thetimes.com/uk/environme...

This is my top pet-peeve!

Frodo: I wish so much unbelievably stupid shit had not happened in my time Gandalf: So do all who live to see such times. This is all exceptionally stupid, though

Some exciting books coming out this year (brief thread):
The brilliant @jomarchant.bsky.social looks at the science of now and the nature of reality: In Search of Now

Deadline coming up for EGU2026 abstracts!
www.egu26.eu/session/56947

Deadline coming up for EGU2026 abstracts!
www.egu26.eu/session/56947

A short thread about the back story behind our new study. 🌊
A pile of evidence suggests the Atlantic overturning #AMOC (and its surface branch North Atlantic Current) has slowed. But some colleagues were sceptical, arguing the Norwegian Current and its deep return flow haven't slowed. 1/6

China has now reacted to the news that the Trump White House wants to pull the US out of a range of UN orgs and entities, such as the UNFCCC and IPCC:

"No matter how the situation may evolve, China will stay committed to multilateralism"

www.fmprc.gov.cn/eng/xw/fyrbt...

If geoengineering is ever deployed in a climate emergency, transparency is key | Ines Camilloni If geoengineering is ever deployed in a climate emergency, transparency is key | Ines Camilloni: We must not let geoengineering be shaped behind closed doors. Climate justice demands an inclusive approach As the world faces the challenges of the climate crisis and critical threshold level...

If geoengineering is ever deployed in a climate emergency, transparency is key | Ines Camilloni: We must not let geoengineering be shaped behind closed doors. Climate justice demands an inclusive approach As the world faces the challenges of the climate crisis and critical threshold level...