21.12.2020

# New Publications

0 Comments

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."

LINK


Read more »

15.12.2020

# New Publications

0 Comments

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."

LINK


Read more »

19.10.2020

# New Publications

0 Comments

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."

LINK


Read more »

24.08.2020

# New Publications

0 Comments

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."

LINK


Read more »

06.07.2020

# Media

0 Comments

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."

LINK


Read more »

10.04.2020

# New Publications

0 Comments

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."

LINK


Read more »

10.02.2020

# Media

0 Comments

Irish Times: How to get the carbon dioxide we shoved into the atmosphere back out again

"Environmentalists get nervous when they hear people talking about reducing carbon-induced global warming through “geoengineering”, the use of technology to intervene directly in the Earth’s systems to reduce the impact of climate change."

LINK


Read more »

29.01.2020

# New Publications

0 Comments

Macias-Fauria, Marc; et al. (2020): Pleistocene Arctic megafaunal ecological engineering as a natural climate solution?

Macias-Fauria, Marc; Jepson, Paul; Zimov, Nikita; Malhi, Yadvinder (2020): Pleistocene Arctic megafaunal ecological engineering as a natural climate solution? In Philosophical transactions of the Royal Society of London. Series B, Biological sciences 375 (1794), p. 20190122. DOI: 10.1098/rstb.2019.0122.

"Here we review the environmental context of megafaunal ecological engineering in the Arctic; explore the mechanisms through which it can help mitigate climate change; and estimate its potential—based on bison and horse, with the aim of evaluating the feasibility of generating an ecosystem shift that is economically viable in terms of carbon benefits and of sufficient scale to play a significant role in global climate change mitigation."

LINK


Read more »

23.01.2020

# Media

0 Comments

BBC News: Space mission to reveal 'Truths' about climate change

"The UK is going to lead a space mission to get an absolute measurement of the light reflected off Earth's surface."

LINK


Read more »

09.12.2019

# New Publications

0 Comments

Zampieri, L.; et al. (2019): Sea Ice Targeted Geoengineering Can Delay Arctic Sea Ice Decline but not Global Warming

Zampieri, Lorenzo; Goessling, Helge F. (2019): Sea Ice Targeted Geoengineering Can Delay Arctic Sea Ice Decline but not Global Warming. In Earth's Future 7. DOI: 10.1029/2019EF001230.

"To counteract global warming, a geoengineering approach that aims at intervening in the Arctic ice‐albedo feedback has been proposed. A large number of wind‐driven pumps shall spread seawater on the surface in winter to enhance ice growth, allowing more ice to survive the summer melt. We test this idea with a coupled climate model by modifying the surface exchange processes such that the physical effect of the pumps is simulated."

LINK


Read more »