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*Andrew Lockley* <https://substack.com/@solargeoengineeringupdates> *Apr 7* <https://substack.com/@solargeoengineeringupdates> <https://substack.com/app-link/post?publication_id=1945767&post_id=160813531&utm_source=substack&isFreemail=true&submitLike=true&token=eyJ1c2VyX2lkIjoxMTgwNDMzNTUsInBvc3RfaWQiOjE2MDgxMzUzMSwicmVhY3Rpb24iOiLinaQiLCJpYXQiOjE3NDQwNjQyODEsImV4cCI6MTc0NjY1NjI4MSwiaXNzIjoicHViLTE5NDU3NjciLCJzdWIiOiJyZWFjdGlvbiJ9.fEEdHYGz8GvzyUU_Z8nHdcFSAl9yxULD-gCHJXYM_Cs&utm_medium=email&utm_campaign=email-reaction&r=1ya2u3> <https://substack.com/app-link/post?publication_id=1945767&post_id=160813531&utm_source=substack&utm_medium=email&isFreemail=true&comments=true&token=eyJ1c2VyX2lkIjoxMTgwNDMzNTUsInBvc3RfaWQiOjE2MDgxMzUzMSwiaWF0IjoxNzQ0MDY0MjgxLCJleHAiOjE3NDY2NTYyODEsImlzcyI6InB1Yi0xOTQ1NzY3Iiwic3ViIjoicG9zdC1yZWFjdGlvbiJ9.5Iv9n3xcccK6GZfIygy_mAfZQfbvTEN7VvIjhY5K6do&r=1ya2u3&utm_campaign=email-half-magic-comments&action=post-comment&utm_source=substack&utm_medium=email> <https://substack.com/app-link/post?publication_id=1945767&post_id=160813531&utm_source=substack&utm_medium=email&utm_content=share&utm_campaign=email-share&action=share&triggerShare=true&isFreemail=true&r=1ya2u3&token=eyJ1c2VyX2lkIjoxMTgwNDMzNTUsInBvc3RfaWQiOjE2MDgxMzUzMSwiaWF0IjoxNzQ0MDY0MjgxLCJleHAiOjE3NDY2NTYyODEsImlzcyI6InB1Yi0xOTQ1NzY3Iiwic3ViIjoicG9zdC1yZWFjdGlvbiJ9.5Iv9n3xcccK6GZfIygy_mAfZQfbvTEN7VvIjhY5K6do> <https://substack.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.73hG_uTpk_YwF7pNzHAZqBfXaV-ihx5b2Skz_3UJgY4?&utm_source=substack&utm_medium=email> READ IN APP <https://open.substack.com/pub/solargeoengineeringupdates/p/weekly-solar-geoengineering-updates?utm_source=email&redirect=app-store&utm_campaign=email-read-in-app> <https://substack.com/redirect/fa508e42-4424-4fb8-8dd3-9b0879c23f4a?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *1. This Week’s Top SRM Highlights**2. Research Papers**3. Web Posts**4. Report*6. Podcasts*7. YouTube Videos**8. Upcoming Events* ------------------------------ <https://substack.com/redirect/990f9af8-b2cc-4747-8f61-48104ced69b4?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *RESEARCH PAPER:* The Global Warming Potential of Geoengineering via Radiative Cooling (Wiley Advanced) <https://substack.com/redirect/b5325433-6025-445a-9b2d-474ff32baf02?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *RESEARCH PAPER:* Competition response of cloud supersaturation explains diminished Twomey effect for smoky aerosol in the tropical Atlantic (PNAS) <https://substack.com/redirect/e3b7c30b-ebcc-470e-a949-1a907cd5d97f?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *SRM RESEARCH FUNDING:* UK’s NERC is funding £10M in 4 research projects to model solar radiation modification impacts (UKRI) <https://substack.com/redirect/58966dd4-539e-408c-b4ac-5836f178c4fd?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *OPINION:* We passed the 1.5C climate threshold. We must now explore extreme options—David King (The Guardian) <https://substack.com/redirect/7bcb0f2b-98a2-4c03-9870-4fcc9acab8aa?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *WEB POST:* Failure to Communicate—Geoengineering could be crucial in the fight against climate change. But first scientists need to learn how to talk to the public about it (Science) <https://substack.com/redirect/ec11d4af-24ae-47e1-9892-06fe62e60ff0?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *REPORT:* Solar Radiation Modification (SRM)—Concepts, Risks and Governance of intervention in the global climate system through solar geoengineering (German Environment Agency) <https://substack.com/redirect/fe982a02-a4e2-4daa-b6b3-6b0134005b0e?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *VIDEO: *“We shouldn’t even talk about geoengineering!” - Oliver Morton, appearing on Saving The World From Bad Ideas (WePlanet) <https://substack.com/redirect/cbbbe9e7-7562-4374-ae6b-32ac8d6088fb?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *Read on to unpack more updates:* <https://substack.com/redirect/bfc26451-a851-41fa-9264-46ce1740e30a?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *The Global Warming Potential of Geoengineering via Radiative Cooling <https://substack.com/redirect/b5325433-6025-445a-9b2d-474ff32baf02?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* Pirvaram, A., Leung, S. N., & O'Brien, P. G. (2025). The Global Warming Potential of Geoengineering via Radiative Cooling. *Advanced Sustainable Systems*, 2400948.Synopsis: This study evaluates large-scale radiative cooling (RC) surfaces as a climate mitigation strategy. It compares RC materials to conventional surfaces in terms of solar reflectance, infrared emissivity, and cooling power. Ideal materials can achieve 164.8 W·m⁻² cooling power; real-world ones reach 160.8 W·m⁻². Covering 1% of Earth's surface could reduce radiative forcing by 1.61 W·m⁻². RC materials show strong potential to lower global warming and environmental impacts. *The January 2022 Hunga eruption cooled the southern hemisphere in 2022 and 2023 <https://substack.com/redirect/afd1d99b-a888-409e-87e7-636d5b8fb811?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* Gupta, A. K., Mittal, T., Fauria, K. E., Bennartz, R., & Kok, J. F. (2025). The January 2022 Hunga eruption cooled the southern hemisphere in 2022 and 2023. *Communications Earth & Environment*, *6*(1), 240.Synopsis: This study assesses the climate impact of the 2022 Hunga eruption, which injected water vapor and limited sulfur dioxide into the stratosphere. Using satellite data and radiative simulations, the authors find that the eruption caused net radiative cooling in the Southern Hemisphere. Radiative forcing reached −0.55 W·m⁻² in 2022, decreasing in 2023, leading to an estimated cooling of −0.10 K. Contrary to initial concerns, the eruption temporarily cooled rather than warmed the region. *Competition response of cloud supersaturation explains diminished Twomey effect for smoky aerosol in the tropical Atlantic <https://substack.com/redirect/e3b7c30b-ebcc-470e-a949-1a907cd5d97f?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* Dedrick, J. L., Pelayo, C. N., Russell, L. M., Lubin, D., Mülmenstädt, J., & Miller, M. (2025). Competition response of cloud supersaturation explains diminished Twomey effect for smoky aerosol in the tropical Atlantic. *Proceedings of the National Academy of Sciences*, *122*(13), e2412247122.Synopsis: This study investigates how aerosol-induced competition for water vapor limits cloud droplet activation, weakening the Twomey effect. Using data from the LASIC campaign over Ascension Island, researchers found that at high aerosol concentrations—especially in smoky conditions—cloud albedo increases are reduced by 12–35%. This “competition response” dampens radiative cooling and highlights the need to better represent aerosol–cloud interactions in climate models for accurate indirect forcing estimates. *The Stratospheric Aerosol Injection (SAI) Simulator: An Open-Source Web Tool for Exploring Climate and SAI Deployment Scenarios—Preprint <https://substack.com/redirect/78f1ed78-398f-460b-b8b3-17a44d7282bd?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* Beall, C., Irvin, J. A., Dexheimer, J., Gruener, D., Ng, A. Y., Watson-Parris, D., ... & Visioni, D. The Stratospheric Aerosol Injection (SAI) Simulator: An Open-Source Web Tool for Exploring Climate and SAI Deployment Scenarios. *Available at SSRN 5200736*.Synopsis: Given growing doubts about meeting Paris climate goals, Solar Radiation Modification—especially Stratospheric Aerosol Injection—is gaining attention. Though SAI may offer global cooling, major gaps remain in science, equity, and governance. The new SAI Simulator v1.0, a browser-based tool, lets users explore modeled climate impacts of different SAI scenarios, aiming to support inclusive engagement and informed discussion. <https://substack.com/redirect/a68619dd-cbfd-41b9-8df9-c7f68441440e?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Source: The Global Warming Potential of Geoengineering via Radiative Cooling <https://substack.com/redirect/b5325433-6025-445a-9b2d-474ff32baf02?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *Solar Geoengineering Updates is a reader-supported publication. If you find my work valuable, consider supporting it with a paid subscription* Upgrade to paid <https://substack.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.DD58TDRNjBqM-gasU-l8LuhhvnYTQuaHK0n2gEaQsrU?&utm_medium=email&utm_source=subscribe-widget-preamble&utm_content=160813531> ------------------------------ <https://substack.com/redirect/b21a7656-f2d8-4748-ad7e-0a398060069a?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> The Solar Geoengineering Updates Monthly Newsletter (March'2025) (Substack) <https://substack.com/redirect/15765fd1-d4b4-47d4-99bc-0ff1d6c57f84?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Modelling the impact of solar radiation modification (UKRI) <https://substack.com/redirect/58966dd4-539e-408c-b4ac-5836f178c4fd?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> The UK's Natural Environment Research Council is investing £10 million in four projects to model the environmental impacts of solar radiation modification techniques, such as SAI & MCB. These five-year studies, starting in April 2025, will use computer modeling to assess SRM's potential effects, aiming to inform policymakers. The UK government has no plans to deploy SRM but seeks to understand its implications. We passed the 1.5C climate threshold. We must now explore extreme options—David King (The Guardian) <https://substack.com/redirect/7bcb0f2b-98a2-4c03-9870-4fcc9acab8aa?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> A Growing Number of US States Consider Bills to Ban Geoengineering (SRM360) <https://substack.com/redirect/cbfc0036-55e7-4491-992c-c0b43bef2ce3?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Why Aren't Clouds as Bright as We Thought? (UC San Diego) <https://substack.com/redirect/da42cb44-da5a-4195-b876-ef42ca964679?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Dramatic cuts in China’s air pollution drove surge in global warming (New Scientists) <https://substack.com/redirect/82c12391-25f2-4717-aa5b-899e92a476b4?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Climate Repair: Engineering hope for a sustainable tomorrow (Hellenic Shipping News) <https://substack.com/redirect/a1896a1e-fd55-44c1-a7ad-dd43405489b5?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Hunga volcano eruption cooled, rather than warmed, the Southern Hemisphere (UCLA Newsroom) <https://substack.com/redirect/de0087c5-6ad5-4292-a05c-ab405bbb9797?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> SRM Bans and Moratoria: Calls to Restrict Solar Geoengineering Activities (SRM360) <https://substack.com/redirect/66d3422d-add9-43ec-9b53-232c5116fca8?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Florida senate has passed SB 56 prohibiting geoengineering and weather modification, punishing violators with $100,000 fine and 5 years in prison (Florida Senate) <https://substack.com/redirect/873fa61c-7d7c-42c2-97d3-1a4bc30b2092?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Share Solar Geoengineering Updates <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zb2xhcmdlb2VuZ2luZWVyaW5ndXBkYXRlcy5zdWJzdGFjay5jb20vP3V0bV9zb3VyY2U9c3Vic3RhY2smdXRtX21lZGl1bT1lbWFpbCZ1dG1fY29udGVudD1zaGFyZSZhY3Rpb249c2hhcmUiLCJwIjoxNjA4MTM1MzEsInMiOjE5NDU3NjcsImYiOnRydWUsInUiOjExODA0MzM1NSwiaWF0IjoxNzQ0MDY0MjgxLCJleHAiOjE3NDY2NTYyODEsImlzcyI6InB1Yi0wIiwic3ViIjoibGluay1yZWRpcmVjdCJ9.1HiyosiOElcb0Q_okeNH-dnu6GgBt7GRGbl6-1wJ_co?> ------------------------------ <https://substack.com/redirect/96ac90dc-dbcd-4ab1-a78f-62c7b0e030cc?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Solar Radiation Modification (SRM)—Concepts, Risks and Governance of intervention in the global climate system through solar geoengineering (German Environment Agency) <https://substack.com/redirect/fe982a02-a4e2-4daa-b6b3-6b0134005b0e?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> ------------------------------ <https://substack.com/redirect/339c5570-2b70-4b67-b088-1f501e8930cb?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *The Rise of Conspiratorial Environmentalism with Dr. Holly Jean Buck | Energy VS Climate <https://substack.com/redirect/513dfcd7-1ae5-4bb6-9f84-d779985d98cd?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* "Conspiratorial-environmentalism’s connection to climate and geoengineering; the anti-vax movement; and what it tells us about mainstream environmentalism and climate politics. David and Ed chat with Dr. Holly Buck about this highly topical topic." *Air Pollution and SRM | Climate Reflections: The SRM360 Podcast <https://substack.com/redirect/37b9e301-1774-4ef1-8bc6-9512ef8b9f7d?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* Air Pollution and SRM Climate Reflections: The SRM360 Podcast 20:07 <https://substack.com/redirect/d01e2e6d-2179-4632-81dc-678ad5eaf0a9?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> “This episode explores the history and risks of the sunlight reflection method known as stratospheric aerosol injection (SAI), and its relationship to air pollution. We’re joined by Oliver Morton, Senior and Briefings Editor at The Economist, and Daniele Visioni, Assistant Professor of Earth and Atmospheric Science at Cornell University." *Talking about engineering the climate | Science <https://substack.com/redirect/2f3c260e-b7bf-41ca-8ebf-d3fa7900d9dd?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* “First up on the podcast, climate engineers face tough conversations with the public when proposing plans to test new technologies. Freelance science journalist Rebekah White <https://substack.com/redirect/7c4c090f-c82a-4606-8b53-c921fa7c5c35?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> joins host Sarah Crespi to discuss the questions people have about these experiments and how researchers can get collaboration and buy-in <https://substack.com/redirect/03759734-5c6c-49ee-ad7c-7f93ad3a30d9?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> for testing ideas such as changing the atmosphere to reflect more sunlight or altering the ocean to suck up more carbon dioxide.” Share <https://substack.com/app-link/post?publication_id=1945767&post_id=160813531&utm_source=substack&utm_medium=email&utm_content=share&utm_campaign=email-share&action=share&triggerShare=true&isFreemail=true&r=1ya2u3&token=eyJ1c2VyX2lkIjoxMTgwNDMzNTUsInBvc3RfaWQiOjE2MDgxMzUzMSwiaWF0IjoxNzQ0MDY0MjgxLCJleHAiOjE3NDY2NTYyODEsImlzcyI6InB1Yi0xOTQ1NzY3Iiwic3ViIjoicG9zdC1yZWFjdGlvbiJ9.5Iv9n3xcccK6GZfIygy_mAfZQfbvTEN7VvIjhY5K6do> ------------------------------ <https://substack.com/redirect/bf2afe9c-2409-4c13-8b12-6d0c74f00d08?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> *“We shouldn’t even talk about geoengineering!” - STWF Bad Ideas ep 3 | WePlanet <https://substack.com/redirect/cbbbe9e7-7562-4374-ae6b-32ac8d6088fb?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* <https://substack.com/redirect/db415b04-3d6b-40c0-a7dc-f26671d27c12?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> "In this thought-provoking episode, Mark Lynas is joined by science writer and The Planet Remade author Oliver Morton for a candid conversation about geoengineering — the controversial set of technologies that could help us cool the planet.Oliver argues that not talking about solar geoengineering might itself be a bad idea, especially as climate change accelerates and overshoot scenarios become more likely. They explore how stratospheric aerosols, inspired by volcanic eruptions, could reflect sunlight and reduce warming, and why such solutions are currently taboo in many environmental circles.The episode tackles moral hazard, global equity, the politics of climate action, and why global South leadership is essential for legitimate discussion. Mark even finds himself inching toward changing his own mind." *The Damocles World: Professor Raymond Pierrehumbert on the Dangers of Solar Geoengineering | Nick Breeze ClimateGenn <https://substack.com/redirect/47b92ba6-09cc-4952-b197-93741a2b4f59?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* <https://substack.com/redirect/4495ae21-6c61-423a-8b0f-8caa08a862e7?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> "In this ClimateGenn episode I am speaking with Professor Raymond Pierrehumbert, who is the Halley Professor of Physics at the University of Oxford about solar geoengineering. He and Professor Michael E. Mann from Pennsylvania University coauthored an article in The Guardian on the 12th March 2025. Here we delve deeper into Ray’s overt objections to the UK’s Advanced Research & Invention Agency (ARIA). ARIA is the UK’s version of the mysterious US Defence Advanced projects Agency (DARPA). ARIA has recently allocated £45mn British Pounds to fund solar geoengineering projects including outdoor experiments." *Can Blocking the Sun Save the Planet? Andrew Song on Building Make Sunsets | Out Of Office <https://substack.com/redirect/0f8b7778-cf3f-44e7-bc55-6b163c6e87b7?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* <https://substack.com/redirect/5f9c170d-df8b-467a-ae44-43ce27f50c50?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> "Join us for this eye-opening episode of Out of Office, where we sit down with Andrew Song, co-founder of Make Sunsets, to discuss a radical approach to climate change: solar geoengineering. Andrew explains how releasing reflective aerosols into the stratosphere—something volcanoes do naturally—may help cool the planet, buying time for other sustainability efforts to catch up. We also dive into regulatory roadblocks, the role of public perception, and what it’s like to scale a startup focused on reversing global warming. Is “sunscreen for Earth” really the next frontier? Tune in to find out!" ------------------------------ <https://substack.com/redirect/27818817-dcd2-44fb-ad26-1abc93359d6d?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> Making sense of calls for bans and moratoria for solar geoengineering by SRM360 <https://substack.com/redirect/5d90730e-8d8c-498d-b292-fba4b947e16f?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 09 April 2025 | OnlineGeoOnsdag: Can geoengineering preserve Arctic sea ice? by UiO Realfagsbiblioteket <https://substack.com/redirect/e5b00a00-7ae2-4e3b-afd2-2505ccf700f8?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 09 April 2025 | OnlineFrom less to very controversial geoengineering technologies: an informative session by University of Lisbon <https://substack.com/redirect/8b16f436-b94c-4e38-8e8c-19d41b372bdc?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 10 April 2025 | Lisbon, Portugal (In-person) and OnlineEarth System Intervention Roundtable by ClimateImpact Calendar <https://substack.com/redirect/a5e8574e-3019-45ab-aca4-1b78d2716609?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 22 April 2025 | California*2025 Solar Radiation Management Annual Meeting by Simons Foundation <https://substack.com/redirect/46624853-a202-4246-9dbe-acb446c2763b?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 24-25 April 2025 | New York**The 2025 Degrees Global Forum <https://substack.com/redirect/3ed2b48a-5d17-4d31-8901-c2e7a258e7d8?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 12-16 May 2025 | Cape Town, South Africa**Fifteenth GeoMIP Workshop by NSF and <https://substack.com/redirect/a17a5c2d-2535-4278-81dd-9a5a1eb34faf?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* Quadrature Climate Foundation <https://substack.com/redirect/a17a5c2d-2535-4278-81dd-9a5a1eb34faf?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* | 12-16 May, 2025 | *Cape Town, South Africa*Consultative Workshop and Science-Policy Dialogue on Solar Radiation Modification by UNEP <https://substack.com/redirect/c66e1a6b-3421-47c9-acb2-9d407de51fc2?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 19-20 May 2025 | Switzerland**Artic Repair Conference 2025 by University of Cambridge & Center for Climate Repair <https://substack.com/redirect/a1a60d36-bc2a-4851-b2b8-48d5a8259537?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 26-28 June 2025 | Cambridge UK*2025 RFF and Harvard SRM Social Science Research Workshop: Governance in a Fractured World <https://substack.com/redirect/6cf09d03-0ed7-4304-ba7b-7f5df98c8afb?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | 04-05 September 2025 | Washington DC11th WMO Scientific Conference on Weather Modificatio <https://substack.com/redirect/c939cc8e-a94e-4b41-b7e4-b16ed6a2b8a7?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>n | 3-7 November 2025 | Pune, India Solar Geoengineering Events Calendar <https://substack.com/redirect/8e78de9e-d09f-4726-a31e-9d569f4aeb60?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> ------------------------------ *Follow us on:* *Twitter <https://substack.com/redirect/48cef728-6637-4be0-9aa6-5b3c91eb96e3?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | Bluesky <https://substack.com/redirect/eacbc185-4c6e-4dcb-b0c4-f7c8a61e12dd?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | YouTube <https://substack.com/redirect/67611f74-fbca-4409-b8b0-e2c18fdfb0c0?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | Substack <https://substack.com/redirect/0edab283-948f-49e7-87c4-1ad0c532ed5a?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | Google Group <https://substack.com/redirect/2ec8b867-d500-4e93-aebd-0fc3ef130c9b?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | Podcast 1 <https://substack.com/redirect/a03d0567-610f-47b0-ab10-f485833183e0?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g> | Podcast 2 <https://substack.com/redirect/2bd09ce5-075e-4739-8665-7b379f9be754?j=eyJ1IjoiMXlhMnUzIn0.-xq-mvUw9sjSVZFRVf_xTVa_TZf2s9WaVlK1illEQ0g>* ------------------------------ *Support us here:* Upgrade to paid 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