Matthew Henry
@mattjohenry.bsky.social
Climate science PhD | Aerosols, SRM | Senior Research Fellow | University of Exeter | Based in Leeds | 🇬🇧/🇫🇷
https://matthewjhenry.github.io/
https://matthewjhenry.github.io/
Reposted by Matthew Henry
Nice big feature on Stardust by @karlmathiesen.bsky.social & @corbinhiar.bsky.social this morning.
E&E News: The strange and totally real plot to blot out the sun and reverse global warming
A 25-person startup is developing technology to block the sun and turn down the planet’s thermostat. The stakes are huge — and the company and its critics say regulations need to catch up.
subscriber.politicopro.com
November 19, 2025 at 4:28 PM
Nice big feature on Stardust by @karlmathiesen.bsky.social & @corbinhiar.bsky.social this morning.
"Our results suggest that while mitigating further global warming can reduce heat mortality, mass mortality events remain plausible at near-future temperatures despite current adaptations to heat."
📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Increasing risk of mass human heat mortality if historical weather patterns recur - Nature Climate Change
The authors couple calculations of historical heatwave intensity at present and future global temperatures with exposure–response functions to quantify mortality from extreme heat events in Europe. Th...
www.nature.com
November 18, 2025 at 5:34 PM
"Our results suggest that while mitigating further global warming can reduce heat mortality, mass mortality events remain plausible at near-future temperatures despite current adaptations to heat."
Reposted by Matthew Henry
Is the Atlantic Ocean circulation close to tipping?
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Is the Atlantic Ocean circulation close to tipping?
YouTube video by Earth System Analysis - Potsdam Institute
youtu.be
November 16, 2025 at 3:35 PM
Is the Atlantic Ocean circulation close to tipping?
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Reposted by Matthew Henry
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...
Things really did get better after the Paris Agreement. But it has stagnated post-covid, and we could backslide......
climateactiontracker.org/publications...
November 14, 2025 at 3:58 PM
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...
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).
Frontiers | Commentary: Safeguarding the polar regions from dangerous geoengineering: a critical assessment of proposed concepts and future prospects
Research into polar climate intervention is understandably controversial. The deliberate manipulation of Earth's climate has deep physical, political, an...
www.frontiersin.org
November 14, 2025 at 10:34 AM
@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).
Reposted by Matthew Henry
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
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
November 13, 2025 at 9:42 AM
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
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
Reposted by Matthew Henry
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.
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.
November 12, 2025 at 3:05 PM
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.
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.
Reposted by Matthew Henry
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!
November 7, 2025 at 4:44 PM
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!
November 6, 2025 at 7:07 PM
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, ...
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, ...
Techniques to reflect an additional small portion of sunlight back into space could help cool the planet if deployed globally, but they cannot address the full range of climate impacts or replace emission cuts, says our new briefing today: #ClimateChange royalsociety.org/news/2025/11...
November 6, 2025 at 5:46 PM
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, ...
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, ...
Reposted by Matthew Henry
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.
Why the for-profit race into solar geoengineering is bad for science and public trust
Two scientists argue that the growing commercial efforts to counter climate change by reflecting away sunlight will thwart responsible research in the field.
www.technologyreview.com
November 4, 2025 at 2:50 PM
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!)
Genuinely delighted to download a PhD thesis from a university repository where the author has neglected to remove the words "BITCH THIS IS YOUR THESIS" from the filename.
October 30, 2025 at 12:28 PM
Lovely! (Check out the replies!)
Reposted by Matthew Henry
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.
October 25, 2025 at 2:43 AM
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.
Reposted by Matthew Henry
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....
agupubs.onlinelibrary.wiley.com/doi/full/10....
A Risk‐Risk Assessment of Climate Extremes: Comparing Greenhouse Gas Warming and Stratospheric Aerosol Injection in UKESM1
This study compares the impacts on extreme events under climate change with and without a multi-latitude Stratospheric Aerosol Injection strategy in UKESM1 G6controller reduces extreme heat relat...
agupubs.onlinelibrary.wiley.com
October 17, 2025 at 7:41 AM
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....
agupubs.onlinelibrary.wiley.com/doi/full/10....
Reposted by Matthew Henry
Reposted by Matthew Henry
Stormy weather = cleaner grid!
October 3, 2025 at 2:59 PM
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...
www.youtube.com/watch?v=ggRJ...
Good Night Oppy | Trailer
YouTube video by Amblin
www.youtube.com
October 2, 2025 at 7:53 AM
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...
www.youtube.com/watch?v=ggRJ...
Reposted by Matthew Henry
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”
Happy (rainy) Tuesday, #Boulder. I've got a new story for you all about a new temperature-stable, single-injection rabies vaccine developed by @colorado.edu researcher Ted Randolph.
www.colorado.edu/today/2025/0...
www.colorado.edu/today/2025/0...
New single-dose, temperature-stable rabies vaccines could expand global access
CU Boulder engineers have developed a new method for making vaccines that combines multiple, timed-release doses into a single injection that doesn't require
www.colorado.edu
September 23, 2025 at 4:33 PM
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”
Reposted by Matthew Henry
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:
Opinion | A Responsible Way to Cool the Planet
A small, carefully scaled geoengineering program could compensate for the loss of cooling as we eliminate sulfur pollution.
www.nytimes.com
September 21, 2025 at 3:30 PM
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:
Reposted by Matthew Henry
Dakota Gruener and I have a new piece out in the new issue of @worksinprogress.bsky.social : worksinprogress.co/issue/sunscr...
Sunscreen for the planet - Works in Progress Magazine
The world is warming faster than we can cut emissions. But volcanoes already been cool the planet accidentally. If nature can cool the Earth, maybe we can.
worksinprogress.co
September 18, 2025 at 6:10 PM
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...
worksinprogress.co/issue/sunscr...
Sunscreen for the planet - Works in Progress Magazine
The world is warming faster than we can cut emissions. But volcanoes already been cool the planet accidentally. If nature can cool the Earth, maybe we can.
worksinprogress.co
September 18, 2025 at 5:06 PM
Beautifully illustrated and clear write-up on SRM by @danvisioni.bsky.social and Dakota Gruener.
worksinprogress.co/issue/sunscr...
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.
Check out sites.google.com/view/solarge... for recordings of previous talks and link to sign up to the mailing list.
September 18, 2025 at 2:41 PM
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.
Check out sites.google.com/view/solarge... for recordings of previous talks and link to sign up to the mailing list.
Reposted by Matthew Henry
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.”
Royal Society to debate throwing out Elon Musk
One of the most prestigious scientific bodies in the world is considering expelling Musk after his appearance at Tommy Robinson’s extremist London rally
www.thenewworld.co.uk
September 17, 2025 at 4:39 PM
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.”
Reposted by Matthew Henry
Fascinating job opportunity at ARIA. Leading public engagement for the climate innovation programme aria.pinpointhq.com/en/postings/...
Communications & Engagement Lead: Future Proofing our Climate & Weather
Job Opening: Communications & Engagement Lead: Future Proofing our Climate & Weather at ARIA in London.
aria.pinpointhq.com
September 16, 2025 at 11:41 AM
Fascinating job opportunity at ARIA. Leading public engagement for the climate innovation programme aria.pinpointhq.com/en/postings/...