SOLAR GEOENGINEERING WEEKLY SUMMARY (07 OCTOBER - 13 OCTOBER 2024 <https://substack.com/app-link/publications/1346479/drafts/802bec45-ff99-4aa3-b9a5-679a223fde8c?publication_id=1346479&post_id=149769470&utm_source=post-email-title&utm_campaign=email-post-title&isFreemail=false> ) *Subscribe to our newsletter to receive monthly updates on Solar Geoengineering:* Solar Geoengineering Updates <https://solargeoengineeringupdates.substack.com?utm_source=substack&utm_campaign=publication_embed&utm_medium=email> Monthly news summaries about solar geoengineering. Links to scientific papers, news articles, jobs, podcasts, and videos. <https://solargeoengineeringupdates.substack.com?utm_source=substack&utm_campaign=publication_embed&utm_medium=email> By Andrew Lockley <https://solargeoengineeringupdates.substack.com?utm_source=substack&utm_campaign=publication_embed&utm_medium=email> ------------------------------ RESEARCH PAPERSGlobal perspectives on solar geoengineering: A novel framework for analyzing research in pursuit of effective, inclusive, and just governance <https://www.sciencedirect.com/science/article/pii/S2214629624003700>
Dove, Z., Hernandez, A., Talati, S., & Jinnah, S. (2024). Global perspectives on solar geoengineering: A novel framework for analyzing research in pursuit of effective, inclusive, and just governance. *Energy Research & Social Science*, *118*, 103779. *Abstract* We present a novel analytical framework to evaluate the ethical, political, and justice implications of research on perceptions of emerging technologies. Using the literature on perspectives on solar geoengineering (SG) as an object of study, we develop a framework that interrogates the research process itself. Our framework interrogates whose perceptions are being studied, by whom, using what methods, following which lines of inquiry, and crucially, for what purposes. We do this through the case of SG, a controversial emerging climate intervention technology with potential global social and environmental impacts. We find that SG perspectives research raises important political and justice concerns related to whose perspectives are being studied and for what purposes. We show that SG perspectives research centers the perspectives from the Global North, underrepresents youth perspectives, and that some research aims to increase public support for SG. Ours is the first study to aggregate and quantify this rich empirical data to enable us to visualize these inequities. We also find that investigations of support for SG dominate the literature at the neglect of other important lines of inquiry, such as how cross-cultural perspectives on public engagement and capacity building can inform efforts to institutionalize the inclusion of youth and the Global South in SG discussions. We further find widespread motivation to inform decision-making but without clear direction about how best to do so. We chart a pathway for future perspectives research on SG and broader climate interventions, centered around four recommendations that seek to ameliorate some of these limitations and enhance the potential for perspectives research to enable more effective, inclusive, and just solar geoengineering governance. The Development of a Floating Mono-Particle “Sun Shield” to Protect Corals from High Irradiance during Bleaching Conditions <https://www.mdpi.com/2077-1312/12/10/1809> Scofield, J. M., Prime, E. L., Flores, F., Severati, A., Mongin, M., Bougeot, E., ... & Qiao, G. G. (2024). The Development of a Floating Mono-Particle “Sun Shield” to Protect Corals from High Irradiance during Bleaching Conditions. *Journal of Marine Science and Engineering*, *12*(10), 1809. *Abstract* Coral bleaching is occurring more frequently as the climate changes, with multiple mass mortality events recently recorded on the Great Barrier Reef. Thermal stress coupled with high irradiance have previously been shown to be primary causes for coral bleaching. Therefore, a reduction in either of these pressures could reduce coral stress and eventual bleaching. Herein, we report the early development of a novel technology capable of reducing the amount of light entering a water body by ~20% in open ocean conditions. This mono-particle “sun shield” consists of an ultra-thin monolayer material and reflective calcium carbonate particles. The monolayer enables spreading of the particles into a thin film across the water surface, with only small amounts of material needed: 7.1 g/m2. A numerical modelling case study of residence times and the build-up of reactive oxygen stress in corals showed that the successful application of a stable film over the Lizard Island reef flat could reduce the reactive oxygen stress to below bleaching levels across approximately 1.5 km2 of reef area. With further development, mono-particle films such as this have the potential to be deployed over at-risk coral reefs at relatively small scales during predicted heatwave conditions, potentially reducing the severity of bleaching on coral reefs. Microphysical Interactions Determine the Effectiveness of Solar Radiation Modification via Stratospheric Solid Particle Injection <https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL110575> Vattioni, S., Käslin, S. K., Dykema, J. A., Beiping, L., Sukhodolov, T., Sedlacek, J., ... & Chiodo, G. (2024). Microphysical interactions determine the effectiveness of solar radiation modification via stratospheric solid particle injection. *Geophysical Research Letters*, *51*(19), e2024GL110575. *Abstract* Recent studies have suggested that stratospheric aerosol injection (SAI) of solid particles for climate intervention could reduce stratospheric warming compared to injection of SO2. However, interactions of microphysical processes, such as settling and coagulation of solid particles, with stratospheric dynamics have not been considered. Using a global chemistry-climate model with interactive solid particle microphysics, we show that agglomeration significantly reduces the backscatter efficiency per unit of injected material compared to mono-disperse particles, partly due to faster settling of the agglomerates, but mainly due to increased forward- over backscattering with increasing agglomerate size. Despite these effects, some materials substantially reduce required injection rates as well as perturbation of stratospheric winds, age of air and stratospheric warming compared to injection of SO2 with the most promising results being shown by 150 nm diamond particles. Uncertainties remain as to whether stratospheric dispersion of solid particles is feasible without formation of agglomerates. New submodel for emissions from Explosive Volcanic ERuptions (EVER v1.1) within the Modular Earth Submodel System (MESSy, version 2.55.1) <https://egusphere.copernicus.org/preprints/2024/egusphere-2024-2200/> Kohl, M., Brühl, C., Schallock, J., Tost, H., Jöckel, P., Jost, A., ... & Pozzer, A. (2024). New submodel for emissions from Explosive Volcanic ERuptions (EVER v1. 1) within the Modular Earth Submodel System (MESSy, version 2.55. 1). *EGUsphere*, *2024*, 1-35. *Abstract* We present a methodological study to document the operation of a new submodel for tracer emissions from Explosive Volcanic ERuptions (EVER v1.1), developed within the Modular Earth Submodel System (MESSy, version 2.55.1). EVER calculates additional tendencies of gaseous and aerosol tracers based on volcanic emission source parameters, aligned to specific sequences of volcanic eruptions. It allows for the mapping of size-resolved volcanic ash to number and mass of different size modes, and the employment of various vertical emission profiles. The new submodel is evaluated in atmospheric simulations with the ECHAM/MESSy Atmospheric Model (EMAC) coupling the general circulation model ECHAM5 to EVER and other MESSy submodels, using satellite observations of SO2 column amounts and mixing ratios as well as aerosol optical properties following the explosive eruption of the Nabro volcano (Eritrea) in 2011. Sensitivity studies explore perturbations of the emission source parameters, such as plume location, emitted mass, plume altitude, vertical distribution, and timing of the emission. We integrate information from a volcanic SO2 emission inventory, additional satellite observations, and our findings from the sensitivity studies to establish a historical standard setup for volcanic eruptions impacting stratospheric SO2 from 1990 to 2023. We advocate for this to be a standardized setup in all simulations within the MESSy framework concentrating on the upper troposphere and stratosphere in this period. Additionally, *we demonstrate the applicability of the new submodel for the simulation of degassing volcanoes, with further potential applications in studies on volcanic ash, wildfires, solar geoengineering, and atmospheric transport processes.* A new method for diagnosing effective radiative forcing from aerosol-cloud interactions in climate models <https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3063/> Duran, B. M., Wall, C. J., Lutsko, N. J., Michibata, T., Ma, P. L., Qin, Y., ... & Debolskiy, M. (2024). A new method for diagnosing effective radiative forcing from aerosol-cloud interactions in climate models. *EGUsphere*, *2024*, 1-41. *Abstract* Aerosol-cloud interactions (ACI) are a leading source of uncertainty in estimates of the historical effective radiative forcing (ERF). One reason for this uncertainty is the difficulty of estimating the ERF from aerosol-cloud interactions (ERFaci) in climate models, which typically requires multiple calls to the radiation code and cannot disentangle the contributions from different process to ERFaci. Here, we develop a new, computationally efficient method for estimating the shortwave (SW) ERFaci from liquid clouds using histograms of monthly-averaged cloud fraction partitioned by cloud droplet effective radius (re) and liquid water path (LWP). Multiplying the histograms with SW cloud radiative kernels gives the total SW ERFaci from liquid clouds, which can be decomposed into contributions from the Twomey effect, LWP adjustments, and cloud-fraction (CF) adjustments. We test the method with data from five CMIP6-era models, using the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite instrument simulator to generate the histograms. Our method gives similar total SW ERFaci estimates to other established methods in regions of prevalent liquid cloud, and indicates that the Twomey effect, LWP adjustments, and CF adjustments have contributed −0.34 ± 0.23, −0.22 ± 0.13, and −0.09 ± 0.11 Wm−2, respectively, to the effective radiative forcing of the climate since 1850 in the ensemble mean (95 % confidence). These results demonstrate that widespread adoption of a MODIS re– LWP joint histogram diagnostic would allow the SW ERFaci and its components to be quickly and accurately diagnosed from climate model outputs, a crucial step for reducing uncertainty in the historical ERF. <https://substackcdn.com/image/fetch/f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F281a519c-cd35-40e5-bb78-a5a36bd3585f_550x402.jpeg> The Development of a Floating Mono-Particle “Sun Shield” to Protect Corals from High Irradiance during Bleaching Conditions <https://www.mdpi.com/2077-1312/12/10/1809> ------------------------------ WEB POSTSStratospheric Plan <https://www.dawnaerospace.com/spacelaunch> (Dawn Aerospace)Solar geoengineering research could get funding injection <https://pubs.acs.org/doi/full/10.1021/cen-09912-polcon3> (Global Enterprise)Non-intrusive geoengineering and other emerging energy applications enabled by ultralight 4G planar optics <https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0/PC131210/Non-intrusive-geoengineering-and-other-emerging-energy-applications-enabled-by/10.1117/12.3028697.full> (SPIE)Geoengineering Can Save the Planet — If We Demystify It <https://www.bloomberg.com/opinion/articles/2024-10-09/geoengineering-s-success-at-removing-carbon-depends-on-building-trust?embedded-checkout=true> (Bloomberg)Scientists have said that we can cool the planet back down. Now they’re not sure it will be so easy <https://www.washingtonpost.com/climate-environment/2024/10/09/overshoot-climate-targets-one-point-five/?pwapi_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJyZWFzb24iOiJnaWZ0IiwibmJmIjoxNzI4NDQ2NDAwLCJpc3MiOiJzdWJzY3JpcHRpb25zIiwiZXhwIjoxNzI5ODI4Nzk5LCJpYXQiOjE3Mjg0NDY0MDAsImp0aSI6ImUwOTZiZDg1LTBkN2QtNDFkNi1iYzQ4LWVmMWRkMzFhMjc4MyIsInVybCI6Imh0dHBzOi8vd3d3Lndhc2hpbmd0b25wb3N0LmNvbS9jbGltYXRlLWVudmlyb25tZW50LzIwMjQvMTAvMDkvb3ZlcnNob290LWNsaW1hdGUtdGFyZ2V0cy1vbmUtcG9pbnQtZml2ZS8ifQ.wuREwXE3kBSNdKU5nJ68nyn62JgmXGTZsnnggf0uOEs> (The Washington Post)Breaking Down Barriers at Climate Week NYC <https://sgdeliberation.org/breaking-down-barriers-at-climate-week-nyc/> (DSG)Arctic Futures: White Shield or Blue Economy—Multiplying proposals for ice restoration face geopolitical obstacles <https://legal-planet.org/2024/10/09/arctic-futures-white-shield-or-blue-economy/> (Legal Planet)Scoping Note on Applicable Legal Frameworks for SRM <https://co-create-project.eu/publication/scoping-note-on-applicable-legal-frameworks/> (Co-Create Project)So You Want to Geo-Engineer the Earth (Jacob Rintamaki) Jacob Rintamaki So You Want to Geo-Engineer the Earth <https://jacobrintamakiblog.substack.com/p/so-you-want-to-geo-engineer-the-earth?utm_source=substack&utm_campaign=post_embed&utm_medium=email> My Background… Read more <https://jacobrintamakiblog.substack.com/p/so-you-want-to-geo-engineer-the-earth?utm_source=substack&utm_campaign=post_embed&utm_medium=email> 2 days ago · 1 like · Jacob Rintamaki ------------------------------ REPORTAccelerating Climate Intervention Research to Improve Climate Security <https://www.silverlining.ngo/reports/ac-issue-brief> (SilverLining) ------------------------------ JOB OPPORTUNITYPost-Doc Reserchers Position—The Climate Sytems Engineering Initiative at University of Chicago | Deadline to apply: 15 November 2024 <https://climateengineering.uchicago.edu/csei-postdoctoral-researchers-position/> "The University of Chicago is building a substantial research cluster (including an anticipated ten new faculty lines) on the science, technology, and public policy of Climate Systems Engineering. Our goal is to advance understanding of the benefits, risks, and governance of technologies that might reduce the impacts of accumulated greenhouse gases, and to educate students who will face the challenges of managing industrial civilization on a fragile planet. CSEi’s topical scope includes open-system carbon removal such as enhanced weathering, solar geoengineering, and interventions to limit loss of glacial ice. CSEi welcomes research from across fields including the sciences, humanities, social sciences, public policy, and law. The CSEi Postdoctoral Researchers program aims to develop the next generation of research leaders who will shape the future of climate systems engineering for the benefit of people and the planet. CSEi Postdoctoral Researchers will work closely with UChicago faculty mentors, but their research and funding are independent, and the program will help them develop strong research networks by facilitating collaboration among the postdoctoral cohort and by ensuring that they have ample opportunities to interact with the full community of CSEi-affiliated faculty and research leaders. Securing a faculty mentor in advance is strongly preferred, and applicants are encouraged to reach out early to engage a mentor. UChicago faculty members from any discipline may potentially serve as a mentor, regardless of whether they have prior experience with climate systems engineering." ------------------------------ UPCOMING EVENTS*Modifying Solar Radiation <https://sosvclimatetech.com/agenda/> | 14 October 2024 | Online* *Discovery workshop focussing on atmospheric science (SRM) | 18 October 2024 | Online**Integrative synthesis workshop focusing on identifying gaps in current governance & ethics | 18 November 2024 | Online* *Climate Repair Seminar Series - Autumn 2024 <https://www.tickettailor.com/events/centreforclimaterepair1/1253490>* *1: On the bright side: new developments in Marine Cloud Brightening technology | 16 October 2024**2: Field trials for a cooler planet: sea, sky and ice | 23 October 2024**3: Ethics and Governance (title TBA) | 06 November 2024**4: Good COP, Bad COP: a post-COP29 assessment | 27 November 2024* *2025 Solar Radiation Management Annual Meeting by Simons Foundation <https://www.simonsfoundation.org/event/solar-radiation-management-annual-meeting-2025/> | 24-25 April 2025 | New York **The 2025 Degrees Global Forum <https://substack.com/redirect/8521c00b-652a-4d78-822f-7ae393c57068?j=eyJ1IjoiMjJrMHl3In0.wQQsFypG52typ8FI2nhnJ8eUoUIIkdCkuhmzxNYKtgE> | 12-16 May 2025 | Cape Town, South Africa**Artic Repair Conference 2025 by University of Cambridge & Center for Climate Repair <https://substack.com/redirect/90f81f14-d09c-4418-8d97-c6621d753433?j=eyJ1IjoiMjJrMHl3In0.wQQsFypG52typ8FI2nhnJ8eUoUIIkdCkuhmzxNYKtgE> | 26-28 June 2025 | Cambridge UK* Solar Geoengineering Events Calendar <https://teamup.com/ks64mmvtit583eitxx> ------------------------------ YOUTUBE VIDEOSDIY Geoengineering @ Hope XV | Luke Iseman <https://www.youtube.com/watch?v=1MbZl8g6NKM>DSG's intervention at the UN High-Level Plenary Meeting on Sea Level Rise | DSG <https://www.youtube.com/watch?v=LJo8kC9ydB0> “DSG's Director of International Policy Alia Hassan spoke at the UN General Assembly High-level plenary meeting on addressing existential threats posed by sea level rise." -- You received this message because you are subscribed to the Google Groups "geoengineering" group. 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