1. This Week’s Top SRM Highlights
2. Research Papers
3. Web Posts
4. Job Opportunities
5. YouTube Videos
6. Upcoming Events
Everything we publish on Solar Geoengineering Updates is free to access. If you value this work and are able, please consider supporting us as a paid subscriber. Your support sustains this vital work and helps us reach more people with balanced, timely information on this critical topic.
RESEARCH PAPER: Subtropical Marine Cloud Brightening Suppresses the El Niño–Southern Oscillation (AGU)
JOB OPPORTUNITY: Policy Engagement Assistant (The Degrees Initiative)
VIDEO: The Global Cooling Potential of Radiative Surfaces - Dr. Atousa Pirvaram (MEER SRM)
POST: Officials pass bizarre law meant to protect citizens from nonexistent airborne threat: 'We're not playing that game' (TCD)
Read on to unpack more updates:
Investigating the Relationship Between Environmental Values and Public Perceptions of Geoengineering Technologies
Authors: Kalani Foster
Synopsis: A UK survey explored links between environmental values (via the New Ecological Paradigm) and views on geoengineering, CDR, and SRM. Overall, values didn’t consistently predict support, except for the eco-crisis subtheme. High-NEP respondents saw geoengineering as a looming climate crisis, distrusting policymakers and prioritizing urgency over research concerns. Future work should examine how climate urgency beliefs shape perceptions.
Subtropical Marine Cloud Brightening Suppresses the El Niño–Southern Oscillation
Authors: C. Xing, S. Stevenson, J. Fasullo, C. Harrison, C. Chen, J. Wan, J. Coupe, C. Pfleger
Synopsis: Climate model ensembles reveal starkly different ENSO impacts from two solar geoengineering methods. Marine cloud brightening in the subtropical eastern Pacific cuts ENSO amplitude by ~61% via cooling, drying, and intensified trade winds, weakening key air–sea feedbacks. Stratospheric aerosol injection shows negligible effect, highlighting that geoengineering choices carry major regional climate implications.
Solar Geoengineering Updates - Monthly Solar Geoengineering Updates (July'2025)
The Degrees Initiative - Second Southeast Asia workshop strengthens ties between regional SRM researchers
Daniel's Substack - Can stratospheric aerosol injection ever be democratic?
NOAA Research - High-altitude observations confirm stratospheric source of toxic groundwater contaminant
TCD - Officials pass bizarre law meant to protect citizens from nonexistent airborne threat: 'We're not playing that game'
Exploring Emergence - Decarbonization and Solar Radiation Management Revisited
The Irish Times - Could bouncing the sun’s heat back into space help solve the climate crisis?
The Skeptic - How concerned should we be about the UK’s geoengineering trials?
Policy Engagement Assistant at the Degrees Initiative | Remote within the United Kingdom | Deadline: 31 August 2025
"The Degrees Initiative is a UK-based NGO that builds the capacity of developing countries to evaluate solar radiation modification (SRM), a controversial proposal for reducing some impacts of climate change by reflecting sunlight away from the Earth."
Solar Geoengineering: Air Quality and Mortality Impacts | Remove and Reflect Podcast
This podcast discusses an academic paper that investigates the health impacts of stratospheric aerosol injection (SAI), a proposed climate intervention, specifically focusing on mortality related to fine particulate matter (PM2.5) and ozone (O3). Utilizing a fully coupled climate model (CESM2-WACCM6), the authors assess how SAI, aimed at reducing global warming to 1.0 or 1.5 degrees Celsius above pre-industrial levels, might alter air quality and subsequent health outcomes. The study highlights that SAI's effects on pollution-related mortality are modest and regionally varied, often overshadowed by natural climate variability and pre-existing air quality policies. It concludes that changes in PM2.5 mortality are primarily driven by shifts in non-sulfate aerosols due to precipitation and circulation changes, rather than direct sulfate deposition, while ozone mortality changes are influenced by hemispheric asymmetries in atmospheric chemistry and transport.
MEERtalk August 2025 - Dr. Atousa Pirvaram | MEER SRM
"This talk explores how radiative cooling (RC) materials—engineered to reflect sunlight and emit heat to outer space—compare to conventional construction materials such as concrete, asphalt, common roofing products and natural surfaces. Using metrics like net cooling power, global warming potential (GWP) and radiative forcing (RF), the research highlights how RC materials can significantly offset global radiative forcing when implemented at large scales. The findings point to a promising pathway for integrating RC surfaces into buildings and infrastructure as a practical climate mitigation tool."
The Ethics of Geoengineering: Should We Manipulate Earths Climate? | Climate Cosmos
"Exploring the boundaries of ethics in the face of climate challenges. Is geoengineering our path to salvation, or can it lead us down a dangerous road? Join the conversation and weigh the pros and cons!"
26 August | Online - Making sense of wildfires and solar geoengineering by SRM360 (NEW)
04-05 September | Washington DC - 2025 RFF and Harvard SRM Social Science Research Workshop: Governance in a Fractured World
30 September | Belgium - Grappling with accelerating climate risks - Is it time to explore research into Solar Radiation Modification? by Euractive
6 – 9 October | Online - Virtual workshop series on Stratospheric Aerosol Injection
17 October - Introducing SkyScroll by Planetary Sunshade Foundation
23 October | Helsinki - ATLAS25: Risk Management of Earth System Tipping Points by Operaatio Arktis
3-7 November | Pune, India - 11th WMO Scientific Conference on Weather Modification
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
Follow us on:
Twitter | Bluesky | YouTube | Substack | Google Group | Podcast 1 | Podcast 2
Support us here:
While all content on Solar Geoengineering Updates is free for everyone, I invite those who can to become paid subscribers. Your support empowers this important work and helps us spread the message far and wide.
Share Solar Geoengineering Updates
