04.11.2018

# New Publications

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Duan, L.; et al. (2018): Comparison of the Fast and Slow Climate Response to Three Radiation Management Geoengineering Schemes

Duan, L.; Cao, L.; Bala, G.; Caldeira, K. (2018): Comparison of the Fast and Slow Climate Response to Three Radiation Management Geoengineering Schemes. In: J. Geophys. Res. Atmos. DOI: 10.1029/2018JD029034.

"Geoengineering has been proposed as a backup approach to rapidly cool the Earth and avoid damages associated with anthropogenic climate change. In this study, we use the NCAR Community Earth System Model (CESM) to conduct a series of slab‐ocean and prescribed sea‐surface‐temperature simulations to investigate the climate response to three proposed radiation management geoengineering schemes: stratospheric aerosol increase (SAI), marine cloud brightening (MCB), and cirrus cloud thinning (CCT)."

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17.10.2018

# Media

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TechCrunch: At what point do we admit that geoengineering is an option?

"We already know how to cool the planet without reducing carbon. The solution is so simple it’s almost laughable: just make our clouds a little more reflective, so they reflect more of the sun’s light, and thus reduce our heat."

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27.08.2018

# Media

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NextBigFuture: Geoengineering and Coral Farming are now being tested to save World’s Coral

"The Commonwealth and Queensland governments have announced funding for feasibility projects aimed at manipulating surface water temperatures using three different techniques."

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01.08.2018

# Media

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The Conversation: Geoengineering the Great Barrier Reef needs strong rules

"A recent conference showcased new possibilities for enhancing Reef resilience, including boosting coral abundance and geoengineering techniques that would manipulate local conditions to reduce ocean temperatures."

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18.07.2018

# Media

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The Sydney Morning Herald: 'Truly scary': researcher wants to brighten clouds to rescue the Great Barrier Reef

"Dr Harrison is developing a technology known as “cloud brightening” – encouraging clouds over the reef to deflect more of the sun’s rays back into space, which would hopefully curb rising sea temperatures that cause coral bleaching."

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05.02.2018

# New Publications

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Keller, David P. (2018): Marine Climate Engineering

Keller, David P. (2018): Marine Climate Engineering. In Markus Salomon, Till Markus (Eds.): Handbook on Marine Environment Protection. Science, Impacts and Sustainable Management. 1st edition 2018. Cham: Springer International Publishing, pp. 261–276.

"In this chapter an overview is given of the proposed climate engineering methods that involve the direct manipulation of marine systems. This includes methods that enhance the ocean’s natural physical, chemical, and biological CO2 sequestration pathways, as well as purely technical ones that either use the ocean as a carbon storage reservoir or alter it’s properties to affect the Earth’s radiation budget."

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20.12.2017

# Media

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TEDx: We can control climate, but should we? The ethics of geoengineering

"More specifically, the talk focuses on Marine Cloud Brightening, an idea that explores the possibility of "brightening" clouds over the ocean to make them reflect more sunlight away from the Earth. David then encourages the audience to consider the implications of such a drastic and far-reaching solution to global warming, and whether we, as humans, have the right to intentionally perturb our Earth's natural climate systems."

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09.11.2017

# Media

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McClatchy: We can brighten clouds to reflect heat and reduce global warming. But should we?

"“We think SRN could buy time for other (carbon-reduction) measures to be put in place,” said Philip J. Rasch, chief climate scientist for the Pacific Northwest National Laboratory in Richland, Washington."

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08.11.2017

# New Publications

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Ahlm, Lars; et al. (2017): Marine cloud brightening – as effective without clouds

Ahlm, Lars; Jones, Andy; Stjern, Camilla W.; Muri, Helene; Kravitz, Ben; Kristjánsson, Jón Egill (2017): Marine cloud brightening – as effective without clouds. In Atmos. Chem. Phys 17 (21), pp. 13071–13087. DOI: 10.5194/acp-17-13071-2017.

"Here we present results from coordinated simulations with three Earth system models (ESMs) participating in the Geoengineering Model Intercomparison Project (GeoMIP) G4sea-salt experiment. Injection rates of accumulation-mode sea spray aerosol particles over ocean between 30° N and 30° S are set in each model to generate a global-mean effective radiative forcing (ERF) of −2.0 W m−2 at the top of the atmosphere. We find that the injection increases the cloud droplet number concentration in lower layers, reduces the cloud-top effective droplet radius, and increases the cloud optical depth over the injection area."

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17.10.2017

# New Publications

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Clingerman, Forrest; et al. (2017): Character and Religion in Climate Engineering

Clingerman, Forrest; O'Brien, Kevin J.; Ackerman, Thomas P. (2017): Character and Religion in Climate Engineering. In Issues in Science & Technology 34 (1).

"Here we seek to point out a useful but often-neglected conversation partner that can aid these discussions: religion. Religious traditions offer concepts and vocabularies for addressing ethics and policy. Religion is formatively influential for a majority of the world’s population, but is too often ignored in discussions of the social dimensions of climate engineering. Though we are not suggesting that all ethics and policy must “be religious,” we do argue that everyone (believers and nonbelievers alike) can profit from analyzing the distinctive moral and political ideas emerging from religious traditions and worldviews. In particular, we hold that religion is important to broaden the conversation to include the moral issue of character."

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