23.01.2018

# Media

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Science Newsline: Climate Engineering, Once Started, Would Have Severe Impacts If Stopped

"The study was published online today in Nature Ecology & Evolution. The paper was co-authored by Rutgers Distinguished Professor Alan Robock, research associate Lili Xia and postdoc Brian Zambri, all from the Department of Environmental Sciences at Rutgers University-New Brunswick. Other co-authors were from the University of Maryland, Yale University and Stony Brook University."

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23.01.2018

# New Publications

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Trisos, Christopher H.; et al. (2018): Potentially dangerous consequences for biodiversity of solar geoengineering implementation and termination

Trisos, Christopher H.; Amatulli, Giuseppe; Gurevitch, Jessica; Robock, Alan; Xia, Lili; Zambri, Brian (2018): Potentially dangerous consequences for biodiversity of solar geoengineering implementation and termination. In Nat Ecol Evol 355. DOI: 10.1038/s41559-017-0431-0.

"Here, we assess the effects of the rapid implementation, continuation and sudden termination of geoengineering on climate velocities—the speeds and directions that species would need to move to track changes in climate. Compared to a moderate climate change scenario (RCP4.5), rapid geoengineering implementation reduces temperature velocities towards zero in terrestrial biodiversity hotspots. [...] Rapid geoengineering termination would significantly increase the threats to biodiversity from climate change."

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22.01.2018

# New Publications

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Pfrommer, Tobias (2018): A Model of Solar Radiation Management Liability

Pfrommer, Tobias (2018): A Model of Solar Radiation Management Liability. University of Heidelberg (Discussion Paper Series, 644).

"In this paper I examine the incentives structure and welfare consequences of SRM liability regimes. Characteristics specific to SRM impact on the incentives that liability regimes provide via the definition of harm and the liability standard. Consequently, a liability regime is defined as a combination of a definition of harm and a liability standard in the model."

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20.01.2018

# New Publications

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Gunderson, Ryan; et al. (2018): A Critical Examination of Geoengineering. Economic and Technological Rationality in Social Context

Gunderson, Ryan; Petersen, Brian; Stuart, Diana (2018): A Critical Examination of Geoengineering. Economic and Technological Rationality in Social Context (Sustainability, 10).

"Substantial emissions reductions, unlike geoengineering, are costly, rely more on social-structural than technical changes, and are at odds with the current social order. Because of this, geoengineering will increasingly be considered a core response to climate change. In light of Herbert Marcuse’s critical theory, the promotion of geoengineering as a market-friendly and high-tech strategy is shown to reflect a society that cannot set substantive aims through reason and transforms what should be considered means (technology and economic production) into ends themselves. Such a condition echoes the first-generation Frankfurt School’s central thesis: instrumental rationality remains irrational."

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09.01.2018

# New Publications

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Dai, Z.; et al. (2018): Tailoring meridional and seasonal radiative forcing by sulfate aerosol solar geoengineering

Dai, Z.; Weisenstein, Debra K.; Keith, David W. (2018): Tailoring meridional and seasonal radiative forcing by sulfate aerosol solar geoengineering. In Geophysical Research Letters, n/a‐n/a. DOI: 10.1002/2017GL076472.

(accepted manuscript) "We study the possibility of designing solar radiation management schemes to achieve a desired meridional radiative forcing (RF) profile using a two-dimensional chemistry-transport-aerosol model. Varying SO2 or H2SO4 injection latitude, altitude, and season, we compute RF response functions for a broad range of possible injection schemes, finding that linear combinations of these injection cases can roughly achieve RF profiles that have been proposed to accomplish various climate objectives."

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27.12.2017

# New Publications

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Kravitz, Ben; Robock, Alan (2017): Vetting New Models of Climate Responses to Geoengineering

Kravitz, Ben; Robock, Alan (2017): Vetting New Models of Climate Responses to Geoengineering. In Eos. DOI: 10.1029/2017EO089383.

"The Seventh Meeting of the Geoengineering Model Intercomparison Project; Newry, Maine, 26 July 2017"

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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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18.12.2017

# New Publications

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Niemeier, Ulrike; Schmidt, Hauke (2017): Changing transport processes in the stratosphere by radiative heating of sulfate aerosols

Niemeier, Ulrike; Schmidt, Hauke (2017): Changing transport processes in the stratosphere by radiative heating of sulfate aerosols. In Atmos. Chem. Phys 17 (24), pp. 14871–14886. DOI: 10.5194/acp-17-14871-2017.

"The injection of sulfur dioxide (SO2) into the stratosphere to form an artificial stratospheric aerosol layer is discussed as an option for solar radiation management. Sulfate aerosol scatters solar radiation and absorbs infrared radiation, which warms the stratospheric sulfur layer. Simulations with the general circulation model ECHAM5-HAM, including aerosol microphysics, show consequences of this warming, including changes of the quasi-biennial oscillation (QBO) in the tropics. The QBO slows down after an injection of 4 Tg(S) yr−1 and completely shuts down after an injection of 8 Tg(S) yr−1."

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17.12.2017

# New Publications

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Cao, Long; Jiang, Jiu (2017): Simulated effect of carbon cycle feedback on climate response to solar geoengineering

Cao, Long; Jiang, Jiu (2017): Simulated effect of carbon cycle feedback on climate response to solar geoengineering. In Geophys. Res. Lett. DOI: 10.1002/2017GL076546.

"Here we use an Earth system model to investigate interactive feedbacks between solar geoengineering, global carbon cycle, and climate change. We design idealized sunshade geoengineering simulations to prevent global warming from exceeding 2°C above pre-industrial under a CO2 emission scenario with emission mitigation starting from mid-of-century."

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13.12.2017

# Media

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Mongabay: Climate scientists see silver lining in Bali volcano’s ash cloud

"Scientists are monitoring the emission of sulfur dioxide from the ongoing eruption of Indonesia’s Mount Agung to better understand the climate-cooling effects of the particulate’s dispersal in the stratosphere. They hope that by artificially recreating the phenomenon, they can block the amount of sunlight reaching the Earth’s surface, and thereby “geoengineer” a cooler climate."

 

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