09.08.2021

# New Publications

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Belaia, Mariia; et al. (2021): Optimal Climate Policy in 3D: Mitigation, Carbon Removal, and Solar Geoengineering

Belaia, Mariia; Moreno-Cruz, Juan B.; Keith, David W. (2021): Optimal Climate Policy in 3D: Mitigation, Carbon Removal, and Solar Geoengineering. In Clim. Change Econ., p. 2150008. DOI: 10.1142/S2010007821500081.

"We introduce solar geoengineering (SG) and carbon dioxide removal (CDR) into an integrated assessment model to analyze the trade-offs between mitigation, SG, and CDR."

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09.08.2021

# New Publications

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Hornigold, Thomas (2021): Tradeoffs inherent in solar geoengineering peak-shaving strategies

Hornigold, Thomas (2021): Tradeoffs inherent in solar geoengineering peak-shaving strategies. Available online at https://arxiv.org/pdf/2108.00096.

"In this study, we explore general features of such scenarios, using a combination of simple analytical relationships between emissions and temperatures and modelling to illustrate the strong trade-off between the duration of geoengineering deployment and the temperature overshoot that is suppressed by geoengineering, as well as the scale of negative emissions that are required."

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09.08.2021

# New Publications

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Huynh, Han N.; McNeill, V. Faye (2021): Heterogeneous Reactivity of HCl on CaCO 3 Aerosols at Stratospheric Temperature

Huynh, Han N.; McNeill, V. Faye (2021): Heterogeneous Reactivity of HCl on CaCO 3 Aerosols at Stratospheric Temperature. In ACS Earth Space Chem. DOI: 10.1021/acsearthspacechem.1c00151.

"We studied the kinetics of HCl uptake on airborne CaCO3 aerosols at stratospheric temperature, 207 ± 3 K, by performing experiments under dry conditions using an aerosol flow tube coupled with a custom-built quadrupole chemical ionization mass spectrometer (CIMS) for HCl detection."

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09.08.2021

# New Publications

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Hoffmann, Fabian; Feingold, Graham (2021): Cloud Microphysical Implications for Marine Cloud Brightening: The Importance of the Seeded Particle Size Distribution

Hoffmann, Fabian; Feingold, Graham (2021): Cloud Microphysical Implications for Marine Cloud Brightening: The Importance of the Seeded Particle Size Distribution. In Journal of the Atmospheric Sciences. DOI: 10.1175/JAS-D-21-0077.1.

"In this study, we apply a highly detailed Lagrangian cloud model, coupled to an idealized parcel model as well as a full three-dimensional large-eddy simulation model, to show that the choice of seeded particle size distribution is crucial to the success of MCB, and that its efficacy can be significantly reduced by undesirable microphysical processes."

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02.08.2021

# Media

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Grist: Science has a prescription for the ocean’s heartburn. Some side effects are worth it

"A project to de-acidify bay waters saved baby oysters in Oregon — and has the potential to save the oceans. We just need to get more comfortable with geoeingeering to do it."

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02.08.2021

# Media

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Podcast: Daniele Visioni and Gideon Futerman discuss the Event Solar Geoengineering: Warnings from Scientists, Indigenous Peoples, Youth, and Climate Activists

"His research is currently focused on studying Sulfate Geoengineering, a form of climate engineering that aims to partially, temporarily, offset the effects of climate change by means of injecting sulfate precursors in the stratosphere in order to reflect a small part of the incoming solar radiation and thus reduce global temperatures."

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26.07.2021

# New Publications

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Dove, Zachary; et al. (2021): The middle powers roar: Exploring a minilateral solar geoengineering deployment scenario

Dove, Zachary; Horton, Joshua; Ricke, Katharine (2021): The middle powers roar: Exploring a minilateral solar geoengineering deployment scenario. In Futures 132, p. 102816. DOI: 10.1016/j.futures.2021.102816.

"Here we reflect on our participation in a solar geoengineering governance scenario exercise conducted at the 2019 International Summer School on Geoengineering Governance."

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26.07.2021

# New Publications

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Weisenstein, Debra K.; et al. (2021): A Model Intercomparison of Stratospheric Solar Geoengineering by Accumulation-Mode Sulfate Aerosols

Weisenstein, Debra K.; Visioni, Daniele; Franke, Henning; Niemeier, Ulrike; Vattioni, Sandro; Chiodo, Gabriel et al. (2021): A Model Intercomparison of Stratospheric Solar Geoengineering by Accumulation-Mode Sulfate Aerosols. Preprint. In Atmospheric Chemistry and Physics. DOI: 10.5194/acp-2021-569.

"The intercomparison explores how the injection of new accumulation-mode particles changes the large-scale particle size distribution and thus the overall radiative and dynamical response to sulfate aerosol injection."

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26.07.2021

# New Publications

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Pasztor, Janos (2021): Solar geoengineering research needs formal global debate

Pasztor, Janos (2021): Solar geoengineering research needs formal global debate. In Nature 595 (7868), p. 494. DOI: 10.1038/d41586-021-01957-1.

"The longer we take to radically slash emissions, the greater the possibility that the world might need to consider SRM."

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26.07.2021

# Media

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Video: Centre for Climate Repair at Cambridge: Refreezing the Arctic: Marine Cloud Brightening and other techniques

"We will hear from experts on the potential of Marine Cloud Brightening - including its use to protect the Great Barrier Reef (Dr Daniel Harrison), atmospheric modelling (Dr Alan Gadian) and its potential to refreeze the Arctic (Dr Hugh Hunt) - as well as localized albedo modification for ice preservation and regeneration (Dr Leslie Field."

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