19.04.2021

# Media

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Phys.org: Geotextiles could slow glacial melt, but at what cost?

"In the Swiss Alps, some ski resorts and glacial tourist attractions are using reflective blankets known as geotextiles to protect parts of glaciers from accelerated summer melt caused by global warming."

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19.04.2021

# Media

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The Guardian: Whitest-ever paint could help cool heating Earth, study shows

"New paint reflects 98% of sunlight as well as radiating infrared heat into space, reducing need for air conditioning."

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22.03.2021

# Political Papers

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C2G Policy Brief (2021): Climate-Altering Approaches and the Arctic

C2G Policy Brief (2021): Climate-Altering Approaches  and the Arctic. 17th March 2021 - 2nd Edition.

"The Arctic plays a key role in the global climate system. Current commitments made under the 2015 Paris Agreement on climate change are insufficient to keep global warming to ‘well below’ 2°C, and according to the Intergovernmental Panel on Climate Change (IPCC), much greater ambition is necessary."

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11.03.2021

# Projects

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Project: Arctic Ice Project

"The most studied ice restoration effort in the world. We’re developing a safe, localized technique to enhance the Arctic’s natural ability to reflect solar radiation out of the atmosphere, increase the Earth’s planetary albedo, and slow the rate of global warming."

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21.12.2020

# New Publications

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Zhao, Mengying; et al. (2020): Climate more responsive to marine cloud brightening than ocean albedo modification: A model study

Zhao, Mengying; Cao, Long; Duan, Lei; Bala, Govindasamy; Caldeira, Ken (2020): Climate more responsive to marine cloud brightening than ocean albedo modification: A model study. In Journal of Geophysical Research: Atmospheres. DOI: 10.1029/2020JD033256.

"Marine cloud brightening (MCB) and ocean albedo modification (OAM) are two proposed approaches to intentionally reflect sunlight back to space over oceanic regions. Using the NCAR Community Earth System Model, we compare climate response to MCB and OAM under the framework of fast adjustment and slow feedback."

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15.12.2020

# New Publications

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Moore, John C.; et al. (2020): Targeted Geoengineering: Local Interventions with Global Implications

Moore, John C.; Mettiäinen, Ilona; Wolovick, Michael; Zhao, Liyun; Gladstone, Rupert; Chen, Ying et al. (2020): Targeted Geoengineering: Local Interventions with Global Implications. In Glob Policy. DOI: 10.1111/1758-5899.12867.

"Targeted geoengineering aims to tackle a global scale impact of climate warming by addressing local or regional systemic interventions. We consider three examples: conserving the West Antarctic ice sheet by limiting rates of ice discharge or increasing snow accumulation, thereby reducing global sea level rise; transforming the Arctic permafrost zone into steppe grassland; raising the albedo of Arctic sea ice."

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19.10.2020

# New Publications

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Wolf, Martin J.; et al. (2020): A biogenic secondary organic aerosol source of cirrus ice nucleating particles

Wolf, Martin J.; Zhang, Yue; Zawadowicz, Maria A.; Goodell, Megan; Froyd, Karl; Freney, Evelyn et al. (2020): A biogenic secondary organic aerosol source of cirrus ice nucleating particles. In Nat Comms 11 (1), p. 4834. DOI: 10.1038/s41467-020-18424-6.

"Atmospheric ice nucleating particles (INPs) influence global climate by altering cloud formation, lifetime, and precipitation efficiency. The role of secondary organic aerosol (SOA) material as a source of INPs in the ambient atmosphere has not been well defined. Here, we demonstrate the potential for biogenic SOA to activate as depositional INPs in the upper troposphere by combining field measurements with laboratory experiments."

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24.08.2020

# New Publications

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Daniel Bodansky; Hugh Hunt (2020): Arctic Climate Interventions

Daniel Bodansky; Hugh Hunt (2020): Arctic Climate Interventions. In The International Journal of Marine and Coastal Law 35 (3), pp. 596–617. DOI: 10.1163/15718085-BJA10035.

"Even if one believes that global climate interventions, such as injecting aerosols into the stratosphere to scatter sunlight, pose unacceptable risks and should be disqualified from consideration, Arctic interventions differ in important respects. They are closer in kind to conventional mitigation and adaptation and should be evaluated in similar terms. It is unclear whether they are feasible and would be effective in saving the Arctic. But given the importance of the Arctic, they should be investigated fully."

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06.07.2020

# Media

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Video: Clive Elsworth: Iron Salt Aerosol Presentation

"The presentation will briefly:

  • make the urgent case for Negative Emission Technologies,
  • explain how methane removal is the low hanging fruit,
  • explain how a very diffuse ISA application over a wide area of iron-poor ocean would additionally safely induce a continuous, climate-relevant absorption of CO2."

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10.04.2020

# New Publications

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Diamond, Michael S.; et al. 2020: Substantial Cloud Brightening From Shipping in Subtropical Low Clouds.”

Diamond, Michael S., Hannah M. Director, Ryan Eastman, Anna Possner, and Robert Wood. 2020: “Substantial Cloud Brightening From Shipping in Subtropical Low Clouds.” AGU Advances 1 (1). https://doi.org/10.1029/2019av000111.

"We attribute a significant increase in cloud reflectivity to enhanced cloud droplet number concentrations within a major shipping corridor in the southeast Atlantic."

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