05.02.2018

# New Publications

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Tan, Raymond R.; et al. (2018): Graphical Pinch Analysis for Planning Biochar-Based Carbon Management Networks

Tan, Raymond R.; Bandyopadhyay, Santanu; Foo, Dominic C. Y. (2018): Graphical Pinch Analysis for Planning Biochar-Based Carbon Management Networks. In Process Integr Optim Sustain 18 (5), p. 1457. DOI: 10.1007/s41660-018-0033-6.

"Biochar is a potentially scalable negative emission technology (NET). The negative net flow of carbon is achieved sequentially via photosynthesis which fixes atmospheric carbon into biomass, followed by thermochemical processing of biomass into biochar which converts the bulk of the fixed carbon into stable or recalcitrant form, and finally by the application of the resulting biochar to soil. In addition, this process can result in additional carbon offsets through favorable modification of soil by reducing fertilizer requirement, as well as other secondary benefits. On the other hand, biochar is typically contaminated with traces of organic (e.g., dioxins) and inorganic impurities (e.g., salts) that are detrimental to soil quality."

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05.02.2018

# New Publications

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Visioni, Daniele; et al. (2018): Upper tropospheric ice sensitivity to sulfate geoengineering

Visioni, Daniele; Pitari, Giovanni; Di Genova, Glauco (2018): Upper tropospheric ice sensitivity to sulfate geoengineering. In Atmos. Chem. Phys. Discuss., pp. 1–37. DOI: 10.5194/acp-2018-107.

"Aside from the direct surface cooling sulfate geoengineering (SG) would produce, the investigation on possible side-effects of this method is still ongoing, as for instance on upper tropospheric cirrus cloudiness. Goal of the present study is to better understand the SG thermo-dynamical effects on the homogeneous freezing ice formation process. This is done by comparing SG model simulations against a RCP4.5 reference case: in one case the aerosol-driven surface cooling is included and coupled to the stratospheric warming resulting from aerosol absorption of longwave radiation."

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05.02.2018

# Media

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North Queensland Register: Climate engineering to cope with heatwave extremes from climate change

"Heatwaves are happening more often and researchers are responding with practical climate engineering strategies to take the edge off the impacts of extreme hot spells."

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05.02.2018

# Media

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iNews: The tech race to save Earth from global warming by absorbing carbon from the air

"Can we build carbon-absorbing technology in time to stop climate change?"

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05.02.2018

# Media

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The Guardian: How Bill Gates aims to clean up the planet

"It’s a simple idea: strip CO2 from the air and use it to produce carbon-neutral fuel. But can it work on an industrial scale?"

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05.02.2018

# Media

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Carbon Brief: Negative emissions have ‘limited potential’ to help meet climate goals

"The potential for using negative emissions technologies to help meet the goals of the Paris Agreement could be more “limited” than previously thought, concludes a new report by European science advisors."

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05.02.2018

# Media

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The Guardian: ‘Silver bullet’ to suck CO2 from air and halt climate change ruled out

"Scientists say climate targets cannot be met using the technologies, which either risk huge damage to the environment or are very costly"

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05.02.2018

# Media

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Research in Context: Are negative emissions being calculated too optimistic? (German)

Respsonses by interdisciplinary scholars to the EASAC report in German.

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05.02.2018

# New Publications

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Griffioen, Jasper (2017): Enhanced weathering of olivine in seawater. The efficiency as revealed by thermodynamic scenario analysis

Griffioen, Jasper (2017): Enhanced weathering of olivine in seawater. The efficiency as revealed by thermodynamic scenario analysis. In The Science of the Total Environment 575, pp. 536–544. DOI: 10.1016/j.scitotenv.2016.09.008.

"This study aimed to characterise how olivine can weather in seawater, to elucidate the role of secondary precipitation and to ascertain the efficiency in terms of molar CO2 removal per mole of olivine dissolution. Geochemical thermodynamic equilibrium modelling was used, which considered both the variable mineralogical composition of olivine and the kinds of secondary precipitates that may be formed. The advantage is that such an approach is independent from local or regional factors as temperature, related kinetics, mineralogy, etc. The results show that the efficiency falls when secondary precipitates are formed."

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05.02.2018

# Media

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Phys.org: Glacial geoengineering—the key to slowing sea level rise?

"The rapid collapse of some of the world's biggest glaciers due to climate change will have devastating consequences for our planet's coastlines due to sea level rise. Compounding this issue is the fact that many of these coastlines are heavily populated and developed. A recent proposal, first reported in The Atlantic, aims to avert potential catastrophe by turning to geoengineering through the construction of massive underwater walls, called sills, which would be built where glaciers meet the ocean in Antarctica and Greenland."

 

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