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RESEARCH PAPER: Impacts of Solar Radiation Modification on Temperature Extremes and Heatwaves in Southeast Asia (ScienceDirect)
RESIDENCY PROGRAM: Advancing Regional and Interdisciplinary Leadership in Solar Geoengineering Governance (DSG)
ANALYSIS: Fear, trust and other human factors are vital yet overlooked piece of solar geoengineering research (University of Michigan)
NEWS: Marjorie Taylor Greene Announces Bill To Tackle 'Weather Modification' (Newsweek)
NEWS REACTION: Lawmaker sparks controversy after proposing law based on conspiracy theories: 'False claims' (TCD)
BOOK REVIEW: Reflections on the book “Dimming the Sun - the urgent case for geoengineering” by Thomas Ramge (Janos Pasztor)
JOB OPPORTUNITY: Senior Climate Scientist (Environmental Defense Fund)
VIDEO: Solar Climate Intervention Virtual Symposium 19 | Dr Haozhe He & Dr Kwesi Quagraine) (Solar Climate Intervention Talks)
Read on to unpack more updates:
Cloud Susceptibility and Climate Sensitivity to Midlatitude Marine Cloud Brightening
Authors: Haruki Hirasawa, Matthew Henry, Alex M Mason, Philip J Rasch, Sarah J Doherty, Robert Wood, James Haywood, Knut Von Salzen
Synopsis: Marine Cloud Brightening aims to cool the climate by injecting sea salt aerosol (iSSA) to boost cloud reflectivity. Using three Earth System Models, this study tests MCB in 14 ocean regions. It finds midlatitude oceans yield stronger cloud forcing, higher cooling efficiency, and more uniform effects. Midlatitude iSSA patterns produce temperature and precipitation responses that mirror GHG warming but in reverse, suggesting they could better maintain near-present climate conditions.
Impacts of Solar Radiation Modification on Temperature Extremes and Heatwaves in Southeast Asia
Authors: Zeqian Feng, Mou Leong Tan, Mohd Amirul Mahamud, Joon Chuah, Fei Zhang
Synopsis: This study assesses SRM effects on heatwaves in Southeast Asia using G6Solar and G6Sulfur scenarios vs. SSP pathways. By 2099, SSP585 shows severe heatwave increases; SRM moderates these extremes, with G6Sulfur slightly more effective. Results highlight spatial differences and provide insights for policymakers considering SRM in a vulnerable region.
Comparing future projections of warm spells and their characteristics under climate change and stratospheric aerosol injection in CESM2 and UKESM1
Authors: Ivy Glade, James W. Hurrell, Danica L. Lombardozzi
Synopsis: Extreme heat events are worsening due to climate change, affecting health, crops, ecosystems, and water. This study uses CESM2 and UKESM1 to assess how SAI might reduce warm spells under a moderate emissions scenario (SSP2-4.5). Both models show warm spells will intensify without SAI, but SAI could mitigate many impacts. Model differences, however, stress the need for inter-model comparisons to understand future extreme heat under climate intervention.
Superhydrophobic photonic-phononic FEP composites for daytime radiative cooling
Authors: Wenlong Zhou, Sujing Lin, Ningyuan Xie, Shengxing Wang, Xiaohan Ma, Mai Liu, et al.
Synopsis: This study develops Passive Daytime Radiative Cooling (PDRC) coatings by embedding TiO₂ and Al₂O₃ particles in FEP using a spray-phase separation method. The coatings achieve high solar reflectance (0.984) and strong mid-IR emissivity (0.981), with excellent hydrophobicity (WCA 162.8°). They lower surface temperature by 10.9 °C under sunlight and show good durability under UV and varying pH, offering a simple, large-area solution for energy-free cooling.
Using Large Eddy Simulations to Study How Climate Change Influences Aerosol-Cloud Interactions - Preprint
Authors: Hongwei Sun, Peter Blossey, Robert Wood, Ehsan Erfani, Sarah Doherty, Je-Yun Chun
Synopsis: Aerosol-cloud interactions are highly uncertain climate forcings. Using large eddy simulations of marine clouds in the Northeast Pacific, this study shows that in a double-CO₂ climate, aerosol effects like cloud fraction and liquid water path adjustments weaken. The Twomey effect is less sensitive than LWP changes. Overall, aerosol cooling is reduced, which affects the future potential of marine cloud brightening for climate mitigation.
Aerosol-Cloud Interactions in Marine Low-Clouds in a Warmer Climate - Preprint
Authors: Prasanth Prabhakaran, Timothy A. Myers, Fabian Hoffmann, and Graham Feingold
Synopsis: This study uses large-eddy simulations to assess how aerosols and warming affect the stratocumulus-to-cumulus transition (SCT) in the NE Pacific. Results show cloud radiative effects are more sensitive to climate change than aerosols in stratocumulus, but aerosol effects dominate after cloud breakup. Marine cloud brightening loses efficacy as warming reduces cloud fraction. Climate change alters SCT timing differently under moist vs. dry conditions, while aerosols delay breakup by suppressing rain.
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Minimizing Mass of Diffractive Space Sunshades in Non-Keplerian Orbits at Artificial Equilibrium Points Using Electric Propulsion
Authors: Harun Gürhan, Signe Svensson, Emre Kizilirmak
Synopsis: Space sunshades can help mitigate warming by blocking solar radiation. This thesis explores reducing the mass of diffractive sunshades by moving them from natural sub-Lagrangian points to orbits around artificial points using electric propulsion. Results show that with high-efficiency systems like VASIMR (argon), dry mass could drop by up to 60%, making long-term shading feasible. These findings, though based on simplified assumptions, highlight new design paths for sunshade deployment.
Quantification of the Presence and Production of Giant Sea Salt Aerosol in the Global Marine Atmosphere
Authors: Katherine L Ackerman
Synopsis: Giant sea salt aerosols (GSSA) affect climate but are poorly understood due to observational limits. This study combines models and in-situ data to show that air mass history strongly influences GSSA levels. A new source function, based on global field data and historical conditions, better estimates GSSA production. Coastal processes like wave breaking and uplift greatly boost GSSA concentrations, highlighting the role of local environments and improved modeling for global climate impacts.
Solar Geoengineering Updates - Monthly Solar Geoengineering Updates (June'2025)
MSN - Solar Geoengineering Debate Reignites After Stratospheric Particle Test Shows 0.5°C Regional Cooling
DSG - Advancing Regional and Interdisciplinary Leadership in Solar Geoengineering Governance
Janos Pasztor - Reflections on the book “Dimming the Sun - the urgent case for geoengineering” by Thomas Ramge
MI - Climate geoengineering between innovation and geopolitical risks
University of Michigan - Fear, trust and other human factors are vital yet overlooked piece of solar geoengineering research
The Hill - Earth is absorbing too much sunlight: It’s a waking climate giant
The Narwhal - The weather edit: 2 big ideas for the climate
TCD - Lawmaker sparks controversy after proposing law based on conspiracy theories: 'False claims'
Daily Beast - MTG Wants to Make ‘Deadly’ Weather Manipulation a Felony
Newsweek - Marjorie Taylor Greene Announces Bill To Tackle 'Weather Modification'
The Japan Times - Geoengineering’s risks need to be studied more
The Narwhal - What an effort to save Arctic sea ice means to the people who depend on it
Senior Climate Scientist at Environmental Defense Fund | Remote - US Home
"Science and Innovation at EDF seeks candidates with proven analytical and research skills to lead EDF’s Solar Radiation Modification (SRM) research initiative. EDF’s SRM research initiative is focusing on characterizing the potential impacts of SRM on systems such as agriculture, water supply, and ecosystem health. Initially, we are focused on leveraging empirical data (e.g., SRM analogs like volcanoes, available experimental data) to inform knowledge about impacts and characterize uncertainties through a variety of analysis methodologies."
Call for Abstract for AGU25 - Session: Exploring Inadvertent and Deliberate Aerosol Perturbations on Clouds and the Climate | Submission deadline: 30 July 2025
On thin ice: The race to save Antarctica | Naked Scientists Podcast
"In this edition of The Naked Scientists, we speak to the Cambridge scientists who have made it their mission to understand climate change in one of the world’s most inhospitable regions."
Solar Geoengineering: Bridging Political Divides in US Climate Views | Remove and Reflect Podcast
"This episode covers an open-access research article, published in PLOS Climate, that investigates the relationship between political ideology and public attitudes towards solar geoengineering (SG) in the United States. Authored by a team primarily from the California Institute of Technology, with contributions from the University of Cambridge and Harvard University, the study utilizes a nationally representative survey of 2,109 American voters to assess opinions on SG's effectiveness, associated risks, and preferred climate strategies. The authors find that greater familiarity with SG is associated with reduced political polarization regarding these aspects, suggesting that increased public awareness could foster bipartisan engagement on climate policy. This study highlights that while the American public remains largely unfamiliar with SG, informed opinions tend to bridge ideological divides, offering a potential pathway for more unified climate action."
Quico Toro on How to Save the Climate | Persuasion
"Quico Toro is Director of Climate Repair at the Anthropocene Institute, a contributing editor at Persuasion, and writes the Substack One Percent Brighter."
Can We Really Fix Climate Change? | StarTalk Plus
"The conversation debates the practicality and ethics of geoengineering versus natural carbon removal methods, highlighting how urgent, complex, and uneven the global response to climate change remains. The speakers stress that although many solutions are possible, none are simple—and public awareness and engagement are critically lacking."
Arctic Repair–3 views on climate risk, climate engineering + imagining a future despite the risks. | Nick Breeze ClimateGenn
"In this ClimateGenn episode we are looking at 3 interviews recorded at the Arctic Repair Conference in Cambridge hosted by the Centre for Climate Repair at the University of Cambridge. In the 1st interview with Centre for Climate Repair director, Dr Shaun Fitzgerald, we touch on some of the theme emerging from the conference but also from the news cycle during London Climate Week that was running concurrently."
Can Pollution Help Fight Climate Change? | StarTalk Plus
"Aerosols, while harmful to human health at ground level, can also reflect sunlight and cool the planet—raising the controversial question: can we deliberately inject them into the stratosphere to fight climate change? This interview explores the science and ethical implications of that possibility."
HCI's Cooling Plan for India | Dr. Soumitra Das | Healthy Climate Initiative
Solar Climate Intervention Virtual Symposium 19 (Dr Haozhe He & Dr Kwesi Quagraine) | Solar Climate Intervention Talks
Dr Haozhe He (Princeton University, USA): "Stratospheric aerosol injection can weaken the carbon dioxide greenhouse effect."
Dr Kwesi Quagraine (University of Cape Town, South Africa): "How do atmospheric rivers change under a warmer climate versus a geoengineering climate?"
Sustainable Global Cooling | Ye Tao MEER Presentation – LCAW 2025 | MEER SRM
"In this compelling talk, Ye Tao, founder of the MEER initiative (Mirrors for Earth's Energy Rebalancing), presents the principles of sustainable global cooling—a strategy rooted in science, constrained by real-world limits of energy and material availability."
11 Climate Hardware Companies Saving Our Planet in 2025 | Synapse
"As we move through 2025, climate hardware is no longer a promise for the future; it’s happening now. In this special episode of Hardware to Save a Planet, host Dylan Garrett revisits 11 trailblazing guests who are turning bold ideas into real-world impact. From ocean carbon measurement to truck electrification, next-gen cement, and even cooling the planet with balloons, these founders share a pragmatic drive to solve today’s toughest climate challenges, proving the future of sustainability is being built right now."
29 July 2025 | Online - Making sense of extreme heat 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
6 – 9 October | Online - Virtual workshop series on Stratospheric Aerosol Injection
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)
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