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RESEARCH PAPER: Climate action in space: A sustainable development framework for sunshades at Sun-Earth Lagrange Point 1 (ScienceDirect)
RESEARCH PAPER: Runaway Cooling From Large Solar Reductions Modulated by Ocean Overturning Circulation and Heat Uptake (AGU)
AWARD ANNOUNCEMENT: Impacts and Tradeoffs of Simulated High-Latitude/Low-Altitude SAI Deployment (Reflective)
COMMENTARY: The Earth Is Getting Darker. That’s Not Good News (Popular Mechanics)
REPORT: The Global Tipping Points Report 2025 (Global Tipping Points)
NEWS BRIEF: Monthly Solar Geoengineering Updates (September’2025) (Solar Geoengineering Updates)
UPCOMING EVENT: AMOC: Envisioning a Resilient North - From science to foresight: governance, resilience & interventions (Páll Gunnarsson, Strategic Climate Risks Initiative)
EVENT RECORDING: Martin Siegert and colleagues | Safeguarding the polar regions from dangerous geoengineering (Frontiers)
Read on to unpack more updates:
Climate action in space: A sustainable development framework for sunshades at Sun-Earth Lagrange Point 1
Authors: Jonas Bahlmann, Zizung Yoon, Vittorio Franzese, Enrico Stoll, Andreas M. Hein
Synopsis: This study introduces the Sunshade Development Criteria (SDC), the first framework for evaluating space-based sunshades as a sustainable geoengineering option to mitigate climate change. By analyzing literature through UN SDGs and ESA sustainability indicators, the paper highlights major gaps in sunshade research, including technical maturity, social acceptability, and global inequalities, urging structured development for responsible climate intervention.
Field data on sea ice restoration by artificial flooding in subarctic Canada
Authors: Cody C, Soroosh Afzali, Willem Schellingerhout, Tom Meijeraan, Fonger Ypma
Synopsis: Field research in Newfoundland’s Pistolet Bay (Feb–May 2025) examined sea ice restoration via artificial flooding, where seawater was pumped onto first-year ice across 84 events. Data on ice thickness, salinity, radiation, and phytoplankton were collected through sensors, ice cores, and drone imaging. The dataset enables modeling of sea ice growth, melt, and brine migration, offering insights into flooding dynamics and methods for enhancing sea ice resilience.
Runaway Cooling From Large Solar Reductions Modulated by Ocean Overturning Circulation and Heat Uptake
Authors: Maya V. Chung, Wenchang Yang, Gabriel A. Vecchi
Synopsis: Using multi-century simulations with two global climate models, this study examines asymmetric climate responses to solar forcing of ±1–6%. Cooling produces stronger surface temperature effects than warming due to ice–albedo feedbacks. Under strong cooling, one model shows runaway ice growth, while the other stabilizes through ocean heat transport. Divergent ocean–ice–atmosphere interactions highlight key uncertainties in climate feedback behavior under solar perturbations.
Identifying stable and effective solar geoengineering coalitions - Preprint
Authors: Pietro Andreoni, Leonardo Chiani, Kate Ricke, Massimo Tavoni
Synopsis: Researchers introduce a new framework combining the high-resolution RICE50+ model with a stratospheric aerosol injection (SAI) climate emulator to assess solar geoengineering under limited global cooperation. By integrating uncertainty analysis, sensitivity metrics, and game theory, over 1,800 coalition scenarios are explored, revealing trade-offs between climate effectiveness and political stability—offering insights for equitable, resilient geoengineering governance.
Distinguishing between the Short-Term Climate Responses to Different Stratospheric Aerosol Injection Latitudes with Explainable Artificial Intelligence - Preprint
Authors: Cameron Dong, Elizabeth A. Barnes, Charlotte J Connolly
Synopsis: Using an explainable AI framework, researchers analyze short-term climate responses to unilateral SAI within two years of deployment. Neural networks trained on global temperature and precipitation data accurately identify injection latitude, revealing distinct temperature effects across tropics and midlatitudes and more localized precipitation changes in the tropics. Results highlight rapid, latitude-dependent climate signals following SAI deployment.
Impact of Solar Radiation Management on Anomalous Temperature Side Effects of Climate Change in Papua Province, Indonesia - Conference Paper
Authors: Rahmat Gernowo, Hendri, Ahmad Faqih, Sorja Koesuma, Delfina Azzahra Kusuma, Angger Zulfan Hanggara and Friska Ayu Sakhina
Synopsis: This study examining tropical cyclone impacts in eastern Indonesia, particularly during Storm Surigae (April 2021), analyzes how SRM influences abnormal temperature patterns. Using ERA5 reanalysis data and GeoMIP simulations, researchers find a strong correlation and an overall cooling trend, suggesting SRM could help moderate temperature anomalies during extreme weather events in Papua and nearby islands.
Inevitable & Obvious - How to Learn Everything You Need to Know About Climate Cooling
Solar Geoengineering Updates - Monthly Solar Geoengineering Updates (September’2025)
New Scientist - How pie-in-the-sky conspiracies distract from climate dangers
N+1 - Overshooters: If ever there were bullshit carbon credits carted off to the market, these were the ones
New Scientist - Letter: Geoengineering is going to be very challenging
University of Cape Town - UCT climate scientist on 2025 Forbes Sustainability Leaders list
Yahoo News - Florida airports start reporting banned ‘weather modification’ aircraft per chemtrails ban
SRM360 - Cooperation on Climate Is Hard – SRM Would Make It Harder
Scrolli - ‘We’re not prepared for non-linear climate change’
SilverLining - “Cooling Credits’ Are Not a Viable Climate Solution” from Climatic Change
Reflective - Award Announcement: Impacts and Tradeoffs of Simulated High-Latitude/Low-Altitude SAI Deployment
The Conversation - A US startup plans to deliver ‘sunlight on demand’ after dark. Can it work – and would we want it to?
World Bank Blogs - Pollution, missing heat, and cyclones: what aerosols are doing to climate risk
Popular Mechanics - The Earth Is Getting Darker. That’s Not Good News
Grist - Atlanta is embracing a cheap, effective way to beat urban heat: ‘cool roofs’
TU Delft - Two and a half years of fruitful collaboration: TU Delft and Cambridge advance climate repair research
Share Solar Geoengineering Updates
The Degrees Initiative - Degrees Global Forum on SRM - Conference Report
Global Tipping Points - The Global Tipping Points Report 2025
I See a Darkness—The Climate Movement Expects Deep Overshoot | Reversing Climate Change
 | 369: I See a Darkness—The Climate Movement Expects Deep Overshoot Reversing Climate Change 42:19 |
“I came back from New York Climate Week energized. I loved seeing everyone. But many of the conversations I had profoundly scared me. We’re staring into the abyss of deep overshoot, and it’s staring back into us.
What would it mean for us to make peace with a world that doesn’t decarbonize fast enough? That doesn’t scale carbon removal before tipping points are reached? That is forced into more radical geoengineering approaches that may just be one more layer of intervention that we will likely manage just as badly?
This is an emotional show. It’s about war. It’s about the Holocaust. It’s about what it means to fail, and to fail gracefully, and how imagining how you would feel if you lost everything can potentially offer an unexpected lightness.”
How Climate Intervention can Safely and Quickly Cool the Planet | Healthy Planet Action Coalition
“This event focuses on the highest priority near-term cooling, or “climate intervention”, aspect of The Climate Triad approach that must be accomplished in a short time or all other actions may become moot. “Climate intervention” refers to additional ways to seek to counter or counterbalance climate change induced effects and impacts that involve: (1) reflecting solar radiation or modifying long wave radiation, (2) are global or hemispheric in scope and (3) have to potential be deployed at scale within the next 20 years.”
Who Decides: The Battle Over Geoengineering the Arctic | Climate Emergency Forum
“The discussion brings together perspectives on the urgent need for bold climate action. Panelists examine the feasibility of various geoengineering techniques and weigh the importance of maintaining a broad toolkit—emissions reductions, carbon dioxide removal, and planetary cooling methods—versus focusing exclusively on emission cuts. We analyze the logic and science behind the paper’s calls to limit research on these technologies, and consider the global media’s outsized attention to its findings compared to more nuanced climate science.”
We need to buy time for carbon removal and decarbonization to scale | Tito - AirMiners
Cooling the Planet: Exploring Nature-Inspired Climate Interventions | Healthy Climate Initiative
How our Darkening (Lower Albedo) Earth is Accelerating Climate Mayhem | Paul Beckwith
Stratospheric Aerosol Injection and the Monsoon Webinar | HCI | Healthy Climate Initiative
Martin Siegert and colleagues | Safeguarding the polar regions from dangerous geoengineering | Frontiers
“The session brought together the article’s authors and expert panel members Sophie Crump from the Inuit Circumpolar Council, Greenland, and Prof Aarti Gupta from Wageningen University and Research. They discussed the technical feasibility, long-term costs, environmental risks, and governance limitations of these approaches.”
14 October | Online - Exploring governance analogues for SRM research by Co-Create
15 October | Reykjavík, Reykjavíkurborg - AMOC: Envisioning a Resilient North - From science to foresight: governance, resilience & interventions by Páll Gunnarsson, Strategic Climate Risks Initiative (NEW)
15-16 October | Online - Conference: The Global Heating Emergency Preventing 2°C by 2040: What’s the Plan? by Healthy Planet Action Coalition
16 October | UK - Discover Climate Repair: another kind of climate action by Centre for Climate Repair
17 October - Introducing SkyScroll by Planetary Sunshade Foundation
Saturdays 18 October - 22 November 22 | Online & In-person - An Intro to Climate Systems Engineering by Members of the Climate Systems Engineering Initiative (including David Keith, Tiffany Shaw, and B.B. Cael)
21-22 October | Helsinki, Finland - Workshop: The Future of climate intervention research - an early career gathering by Alliance for Just Deliberation on Solar Geoengineering
23 October | Helsinki - ATLAS25: Risk Management of Earth System Tipping Points by Operaatio Arktis
24 October | Finland - Climate Reckoning: Dr James Hansen & Clare Farrell on where we really stand by Operaatio Arktis
28 October | Online - Live Discussion: Could Solar Geoengineering Help or Harm the Amazon? by SRM360 (NEW)
31 October - Online | Introducing: Sunshade Temperature mitigation using Asteroids and Rings system by Planetary Sunshade Foundation
3-7 November | Pune, India - 11th WMO Scientific Conference on Weather Modification
14 November - Online | Planetary Sunshade Foundation - annual update by Planetary Sunshade Foundation
15-19 December | New Orleans, Louisiana - 2025 American Geophysical Union Meeting
9-13 March 2026 | Kyoto, Japan - CMIP Community Workshop (CMIP26)
21-26 June 2026 | United States - Gordon Research Conference - Bridging Observations, Models, and Impacts in Solar Radiation Modification Research
Solar Geoengineering Events Calendar
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