20.01.2020

# New Publications

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Krishnamohan, K. S.; et al. (2020): The Climatic Effects of Hygroscopic Growth of Sulfate Aerosols in the Stratosphere

Krishnamohan, K. S.; Bala, Govindasamy; Cao, Long; Duan, Lei; Caldeira, Ken (2020): The Climatic Effects of Hygroscopic Growth of Sulfate Aerosols in the Stratosphere. In Earth's Future. DOI: 10.1029/2019EF001326.

"We show that stratospheric sulfate aerosols, for a given mass of sulfates, cause more cooling when prescribed at the lower levels of the stratosphere because of hygroscopic growth. The larger relative humidity in the lower stratosphere causes an increase in the aerosol size through hygroscopic growth which leads to a larger scattering efficiency."

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20.01.2020

# Media

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Phys.org: Can solar geoengineering mitigate both climate change and income inequality?

"While de-carbonizing the world's emissions sources continues to pose a large challenge, solar geoengineering, which is process where incoming sunlight is intentionally reflected to cool rising temperatures, could help avoid the worst consequences of global warming. This analysis is the first to project the response of Gross Domestic Product (GDP) to the specific pattern of cooling solar geoengineering produces."

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20.01.2020

# New Publications

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Harding, Anthony R.; et al. (2020): Climate econometric models indicate solar geoengineering would reduce inter-country income inequality

Harding, Anthony R.; Ricke, Katharine; Heyen, Daniel; MacMartin, Douglas G.; Moreno-Cruz, Juan (2020): Climate econometric models indicate solar geoengineering would reduce inter-country income inequality. In Nat Commun 11 (1), pp. 1–9. DOI: 10.1038/s41467-019-13957-x.

"Combining historical evidence with climate simulations of mean annual temperature and precipitation, we project socio-economic outcomes under high anthropogenic emissions for stylized climate scenarios in which global temperatures are stabilized or over-cooled by blocking solar radiation. We find impacts of climate changes on global GDP-per-capita by the end of the century are temperature-driven, highly dispersed, and model dependent. "

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20.01.2020

# Media

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Mirage News: Reflecting sunlight away from earth could fight climate change and poverty

“We find hotter countries respond more to small changes in temperature,” said Moreno-Cruz, who is also Canada Research Chair in energy transitions. “Because poorer countries tend to be hotter, there is a disproportional impact of climate on those countries.

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09.01.2020

# Calls & events

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Call for Participation: Ecological Impacts of Solar Radiation Management (SRM) Geoengineering Workshops

Deadline: 17. January 2020

"We invite postdocs and graduate students to apply for spots in NSF-funded workshops titled, "Workshops on the ecological impacts of solar radiation management geoengineering." The workshops bring together climate scientists and ecologists to address how solar radiation management (SRM) geoengineering could affect ecology, including species distributions, biodiversity, and ecosystem functions and services."

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07.01.2020

# New Publications

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Moore, John C.; et al. (2019): Greenland Ice Sheet Response to Stratospheric Aerosol Injection Geoengineering

Moore, John C.; Yue, Chao; Zhao, Liyun; Guo, Xiaoran; Watanabe, Shingo; Ji, Duoying (2019): Greenland Ice Sheet Response to Stratospheric Aerosol Injection Geoengineering. In Earth’s Future 110, p. 25. DOI: 10.1029/2019EF001393.

"We simulated Greenland ice sheet climates using four Earth system models running the stratospheric sulfate aerosol injection experiment GeoMIP G4 and the CMIP RCP4.5 and RCP8.5 greenhouse gas scenarios that were then used to drive the surface energy and mass balance model, SEMIC. Simulated runoff is 20% lower under G4 than RCP4.5, while under RCP8.5 it is 17% higher."

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07.01.2020

# Media

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Mother Jones: We Need a Massive Climate War Effort—Now

"This is everybody’s least favorite idea: massive engineering projects to cool down the Earth if it turns out we can’t reduce carbon emissions."

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06.01.2020

# Media

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Podcast: Science Friday: Buying Time In The Climate Crisis

"UCLA researcher Holly Buck is the author of a new book that examines these complexities. She explains to Ira why geoengineering could still be a valid strategy for buying time while we reduce emissions, and why any serious deployment of geoengineering technology would require a re-imagining of society as well."

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06.01.2020

# Media

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Gizmodo: Geoengineering Wouldn't Be Enough to Stop Greenland From Melting

"The results show that the planet-cooling properties of the particles would extend to Greenland, lowering air temperatures there by about 1.1 degrees Celsius (2 degrees Fahrenheit) compared to the scenarios without geoengineering. Runoff from melt would drop anywhere from 20 to 32 percent, with the biggest difference coming under the high greenhouse gas emissions scenario. All that means sea level rise would slow."

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06.01.2020

# New Publications

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Sugiyama, Masahiro; et al. (2020): The North–South Divide on Public Perceptions of Stratospheric Aerosol Geoengineering?: A Survey in Six Asia-Pacific Countries

Sugiyama, Masahiro, Shinichiro Asayama, and Takanobu Kosugi (2020): The North–South Divide on Public Perceptions of Stratospheric Aerosol Geoengineering?: A Survey in Six Asia-Pacific Countries. Environmental Communication. January 3, 2020. https://www.tandfonline.com/doi/abs/10.1080/17524032.2019.1699137?journalCode=renc20&.

"The present study conducted an online survey of college students in six Asia-Pacific countries (Australia, China, India, Japan, the Philippines, and South Korea) about their attitudes toward stratospheric aerosol geoengineering, one of most discussed SRM proposals. Our results showed that students from the Global South (China, India, the Philippines) were more willing to accept geoengineering as a potential option than those from the Global North (Australia, Japan, and South Korea)."

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