Reposted by Ali DuffeyOliver Morton, Eater of Sun @eaterofsun.bsky.social · 25/09/2026Really helpful climate graphic—can't remember seeing a plot quite like this before. www.theclimatebrink.com/p/my-new-nyt... 21510
Ali Duffey @aliduffey.bsky.social · 26/08/2026To some extent we just have to be able to walk and chew gum at the same time though. If you want SRM to be on the table in 15-20 years with a full(ish) understanding of the risks (+how to actually do it in practice), that means scaling up the research program today - science is slow! 000
Reposted by Ali DuffeyDan Visioni @danvisioni.bsky.social · 19/06/2026“Nobody has ever studied this carefully” said the people who spent 10 years threatening to tank the carrier of anybody daring to studying that thing carefully and systematically. I’m going to have a brain aneurysm before 40. 082
Ali Duffey @aliduffey.bsky.social · 16/04/2026Paper out today on high-latitude low-altitude stratospheric aerosol injection (HiLLA-SAI). It's long, with literally 100s of sub-plots, so TL:DR: HiLLA-SAI is a polar-focused but still global intervention, with ~40-70% the global cooling efficiency of "normal" SAI esd.copernicus.org/articles/17/...esd.copernicus.orgThe global climate response to High-Latitude Low-Altitude Stratospheric Aerosol Injection (HiLLA-SAI)Abstract. High-latitude low-altitude (HiLLA) Stratospheric Aerosol Injection (SAI) would face fewer logistical barriers than high-altitude low-latitude SAI, because it could use repurposed existing la... 032
Reposted by Ali DuffeyDavid Roberts @volts.wtf · 04/03/2026On 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?reflective.orgReflective | Radically Accelerating the Pace of Sunlight Reflection ResearchWe equip the world with the data and tools needed to make informed decisions about sunlight reflection, fast enough to matter. 23387
Ali Duffey @aliduffey.bsky.social · 20/01/2026the fact it only hits a particular cohort is what gets me. I will pay much more tax than grads a couple years older than me in the same job, for my whole life! 010
Reposted by Ali DuffeyJulia M. Rohrer @dingdingpeng.the100.ci · 25/12/2025Giving what we can has implemented a fun game where you spin a globe to see how your starting point in life would compare if you were reborn today, randomly somewhere on earth. www.givingwhatwecan.org/birth-lotterygivingwhatwecan.orgBirth LotteryIf you were reborn today, where would you land? And how would that change your life? 15269103
Reposted by Ali DuffeyMatthew Henry @mattjohenry.bsky.social · 11/12/2025New paper on Marine Cloud Brightening in the Arctic! Our simulations show that the introduction of sea-salt aerosols brightens clouds in the Arctic and leads to substantial Arctic cooling, which also restores Arctic sea ice. agupubs.onlinelibrary.wiley.com/doi/10.1029/... 172
Ali Duffey @aliduffey.bsky.social · 07/12/2025Reading back through @eaterofsun.bsky.social 's The Planet Remade and thought this snippet about German involvement in geoengineering research was interesting. 10 years later the opposite seems true. On the other hand, the description of GeoMIP conferences fits the recent ones pretty well.. 111
Ali Duffey @aliduffey.bsky.social · 05/12/2025This from @outrageoptimism.bsky.social is a great intro to recent solar geoengineering developments www.outrageandoptimism.org/episodes/jac...outrageandoptimism.orgJacinda Ardern and… Is It Time to Talk About Geoengineering?This week, hosts Tom Rivett Carnac and Paul Dickinson delve into the rapidly emerging - and faintly surreal - world of solar geoengineering. 000
Reposted by Ali DuffeyAndrew Williams @andrewilwilliams.bsky.social · 04/12/2025Our paper is published! 🎉🎉🎉 If you want to understand changes in total rainfall under warming, give this a read! Happy to chat about it with people :) agupubs.onlinelibrary.wiley.com/doi/10.1029/... 29831
Reposted by Ali DuffeyAndrew Curry @andrewcurry.com · 20/11/2025In 2022, archaeologists at @uni-kiel.de's @neolithicbodies.bsky.social found 34 decapitated skeletons piled in a space the size of a parking spot. In the 3 years since, they’ve found 50 more. The mass grave is evidence for the collapse of the 1st pan-European culture 7,000 years ago. @science.org 🏺💀science.orgHeadless bodies hint at why Europe’s first farmers vanishedWave of mass brutality accompanied the collapse of the first pan-European culture 1210736
Ali Duffey @aliduffey.bsky.social · 21/11/2025Why too low? Those homes aren't 'mansions' by most standards. But if you own a 1.5M home in central London you either bought it recently and therefore have money, or benefitted from big unearned housing market gains and could share some of that back with the state? 000
Reposted by Ali DuffeyMatthew Henry @mattjohenry.bsky.social · 14/11/2025@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).frontiersin.orgFrontiers | Commentary: Safeguarding the polar regions from dangerous geoengineering: a critical assessment of proposed concepts and future prospectsResearch into polar climate intervention is understandably controversial. The deliberate manipulation of Earth's climate has deep physical, political, an... 121
Reposted by Ali DuffeyEd Hawkins @edhawkins.org · 06/11/2025Should we start historical climate simulations in 1750 (or 1800) rather than 1850? Importance of beginning industrial-era climate simulations in the eighteenth century Ballinger, Schurer et al.: iopscience.iop.org/article/10.1... 45922
Reposted by Ali DuffeyMIT Technology Review @technologyreview.com · 04/11/2025In this opinion piece, two scientists argue that the growing commercial efforts to counter climate change by reflecting away sunlight will thwart responsible research in the field.technologyreview.comWhy the for-profit race into solar geoengineering is bad for science and public trustTwo scientists argue that the growing commercial efforts to counter climate change by reflecting away sunlight will thwart responsible research in the field. 0218
Reposted by Ali DuffeyIASC_Arctic @iasc-arctic.bsky.social · 31/10/2025📝 Call for all Polar Researchers to take the Science under Pressure survey! Submissions deadline is 15 November 2025 Read more and take the survey: www.rug.nl/research/arc...rug.nlScience under PressureScience under pressure: Reflecting on conditions, practices and institutional structures for sustainable polar research 002
Ali Duffey @aliduffey.bsky.social · 30/10/2025Fair, but it's a step into the dark either way, and the uncertainty under [more warming] might be larger than that under [less warming + SAI] 010
Ali Duffey @aliduffey.bsky.social · 27/10/2025of course, but by my back of the envelope 'eventually' here means order 100,000 years. 1°C cooling ~ 10 Tg SO2 ~ 1% of current aviation ~ 0.03 % of global CO2 emissions ~ 1E-5 °C extra warming per year SAI Lots of good reasons not to do SAI but the CO2 impact isn't one of them 100
Ali Duffey @aliduffey.bsky.social · 25/10/2025Well said Dan! After a week spent with the inspiring early career SRM community and Operaatio Arktis folks, the contrast in values to Stardust couldn't feel stronger 030
Ali Duffey @aliduffey.bsky.social · 18/10/2025Did Northern Hemisphere air pollution contribute to 70s and 80s Sahel drought? We think so, but we're still arguing about how much. For the most important risks of solar geo, consensus would (hopefully) emerge, but slowly. Informed by observed climate, but still based on theory and modelling 020
Ali Duffey @aliduffey.bsky.social · 18/10/2025"when we deploy it we will see how effective is" I hear this quite a bit but it isn't true. 10 years into a hypothetical SAI deployment, observed rainfall patterns would be pretty much useless for reducing our uncertainty in e.g. indian summer monsoon impacts 110
Reposted by Ali DuffeyJames Dyke @jamesgdyke.info · 17/10/2025Interesting 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.comA Risk‐Risk Assessment of Climate Extremes: Comparing Greenhouse Gas Warming and Stratospheric Aerosol Injection in UKESM1This 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... 54818
Ali Duffey @aliduffey.bsky.social · 16/10/2025The NYT piece quoted here is amazing. Written over 70 years ago and reads exactly like articles about this summer's Texas Rainmaker conspiracy 021
Ali Duffey @aliduffey.bsky.social · 01/10/2025love this chart. It's too late for 1.5, but the fight for 2C is very much still alive 020
Reposted by Ali DuffeyMarie Le Conte @youngvulgarian.marieleconte.com · 19/09/2025wrote about this last year and sure I wasn't in any way the only one but imo people voting for populist politics in the 21st century *is* a sign that they do just have too much faith in institutions, as opposed to not enough - they want to have their little tantrum but assume things will just hold 511530267
Ali Duffey @aliduffey.bsky.social · 09/09/2025The evidence we have, though, suggests SAI is not like these other ideas, being instead logistically feasible, effective and quite cheap. We could be wrong on all three of these, of course, but honest debate about geoengineering demands that we grapple with that evidence 010
Ali Duffey @aliduffey.bsky.social · 09/09/2025The SAI section bends over backwards to try to fit it into the same mould as the others (logistically difficult, expensive, and ineffective), but in doing so makes some surprising errors as well as being one-sided. 100
Ali Duffey @aliduffey.bsky.social · 09/09/2025But the idea that further research into these is a waste of resources is crazy to me, when i think about what is at stake here. Yes sea-curtains sound difficult, but so does building a sea-wall around Bangladesh. 100
Ali Duffey @aliduffey.bsky.social · 09/09/2025Similarly for the ice sheet interventions. While those working on these have been the first to ackowledge that they are profoundly ambitious ideas, the Siegert et al study is a valuable and welcome critical perspective to help understand how and why these ideas would face challenges. 110
Ali Duffey @aliduffey.bsky.social · 09/09/2025My impression is that sea-ice thickening and the ice sheet interventions are somewhere between implausible and just unlikely. The potential for sea-ice thickening to meaningfully impact global climate is often exaggerated, though, and its good to call this out 100
Ali Duffey @aliduffey.bsky.social · 09/09/2025Glass beads for sea-ice albedo modification has always been an implausible idea - here's me in 2023 writing as much. I welcomed the decision of the Arctic Ice project folks to wind down their activities. www.arcticiceproject.org/the-project/ agupubs.onlinelibrary.wiley.com/doi/full/10.... 100
Ali Duffey @aliduffey.bsky.social · 09/09/2025Not all geoengineering proposals are plausible, and we shouldn't waste time and resources on the implausible ones. Siegert et al look at 5 (really, 6): sea-ice thickening, sea-ice albedo modification, sea-bed curtains, basal water removal from ice sheets, CDR via ocean fertilization, and SAI 100
Ali Duffey @aliduffey.bsky.social · 09/09/2025Is 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? 111
Reposted by Ali DuffeyJack Blackburn @hackblackburn.bsky.social · 04/08/2025One of the all-time great test matches. One of the all-time great series. Topsy-turvy, up and down and, in the end, perfectly balanced. Can't say fairer than that. 1245
Reposted by Ali DuffeyHannah Ritchie @hannahritchie.bsky.social · 14/07/2025The Guardian will publish scary headlines about ice sheet and AMOC collapse on a Friday, then stuff like this on a Monday: www.theguardian.com/commentisfre... How are people supposed to navigate this? Is climate change an urgent problem, or not?theguardian.comEd Miliband would let a turbine farm destroy Brontë country. We need net zero, but at what cost? | Simon JenkinsOf course the climate crisis must be confronted, but history, tranquility and beauty must also count for something, says Guardian columnist Simon Jenkins 1628051
Ali Duffey @aliduffey.bsky.social · 14/07/2025"some experts are sceptical".. New Scientist has been poor on distinguishing serious and unserious climate intervention ideas recently. There isn't even a peer-reviewed paper making the case for this yet! 010
Ali Duffey @aliduffey.bsky.social · 12/07/2025Yeah, the conspiracy theories are growing in a very scary way 020
Ali Duffey @aliduffey.bsky.social · 11/07/2025A very good if somewhat strange watch. not very informative on risk-reward tradeoffs for solar geo though 000
Ali Duffey @aliduffey.bsky.social · 11/07/2025..and is why a framing of SRM as an "in case of emergency break-glass" type intervention can be misleading 011
Ali Duffey @aliduffey.bsky.social · 11/07/2025BUT, once things are already tipped, SRM might not be able to get you back - we assessed "reversibiility" as ineffective or only partially effective for many important systems. This shouldn't be surprising - this behaviour is part of what makes these things "tipping points" 111
Ali Duffey @aliduffey.bsky.social · 11/07/2025the slight less TLDR version is that SRM likely reduce the strength of driving factors for tipping in a range of systems, generally by reducing temperature but in some cases by restoring other climatic drivers too 111
Ali Duffey @aliduffey.bsky.social · 11/07/2025here's the paper esd.copernicus.org/articles/16/...esd.copernicus.orgThe interaction of solar radiation modification with Earth system tipping elementsAbstract. The avoidance of hitting tipping points has been invoked as a significant benefit of solar radiation modification (SRM) techniques; however, the physical science underpinning this has thus f... 111
Ali Duffey @aliduffey.bsky.social · 11/07/2025Given this context, I'm delighted to share a new review on the solar geoengineering and earth system tipping points. Its a long read including ice sheets, AMOC, coral reefs, Amazon dieback and various others.. TLDR: solar geo probably helps avoid tipping, but a lot more research is needed 332
Reposted by Ali DuffeyThe Alliance for Just Deliberation on Solar Geoengineering @sgdeliberation.bsky.social · 07/07/2025New opportunity: Become a DSG Fellow and contribute to building critical expertise on solar geoengineering governance. Early- or mid-career and working in climate science, policy, ethics, law, or humanities with an interest in SRM? Apply now: www.sgdeliberation.org/our-work/res... 044
Ali Duffey @aliduffey.bsky.social · 07/07/2025The intro to this paper of mine last year has some potentially useful refs on the hydrological response to SRM, particularly on seperating the fast and slow responses to CO2 iopscience.iop.org/article/10.1... This may all be somewhat tangential to your argument though..iopscience.iop.orgRadware Bot Manager CaptchaTo ensure we keep this website safe, please can you confirm you are a human by ticking the box below. 000