Mengis, N.; Keller, D.; Rickels, W.; Quaas, M.; Oschlies, A. (2019): Climate engineering–induced changes in correlations between Earth system variables—implications for appropriate indicator selection. In: Climatic Change 104 (C7), S. 669. DOI: 10.1007/s10584-019-02389-7.

"Climate engineering (CE) deployment would alter prevailing relationships between Earth system variables, making indicators and metrics used so far in the climate change assessment context less appropriate to assess CE measures. Achieving a comprehensive CE assessment requires a systematic and transparent reevaluation of the indicator selection process from Earth system variables. Here, we provide a first step towards such a systematic assessment of changes in correlations between Earth system variables following simulated deployment of different CE methods."

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MacMartin, D.; Wang, W.; Kravitz, B.; Tilmes, S.; Richter, J.; Mills, M. (2019): Timescale for Detecting the Climate Response to Stratospheric Aerosol Geoengineering. In: J. Geophys. Res. Atmos. 41 (3), S. 1738. DOI: 10.1029/2018JD028906.

"Stratospheric aerosol geoengineering could be used to maintain global mean temperature despite increased atmospheric greenhouse gas (GHG) concentrations, for example, to meet a 1.5 or 2 °C target. While this might reduce many climate change impacts, the resulting climate would not be the same as one with the same global mean temperature due to lower GHG concentrations. The primary question we consider is how long it would take to detect these differences in a hypothetical deployment. We use a 20‐member ensemble of stratospheric sulfate aerosol geoengineering simulations in which SO₂ is injected at four different latitudes to maintain not just the global mean temperature, but also the interhemispheric and equator‐to‐pole gradients."

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Dagon, K.; Schrag, D. (2019): Quantifying the effects of solar geoengineering on vegetation. In: Climatic Change 13 (5), S. 776. DOI: 10.1007/s10584-019-02387-9.

"Solar geoengineering has potential to reduce the climate effects of greenhouse gas emissions through albedo modification, yet more research is needed to better understand how these techniques might impact terrestrial ecosystems. Here, we utilize the fully coupled version of the Community Earth System Model to run transient solar geoengineering simulations designed to stabilize radiative forcing starting mid-century, relative to the Representative Concentration Pathway 6 (RCP6) scenario."

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Williams, N.; Seipp, C.; Brethomé, F.; Ma, Y.; Ivanov, A.; Bryantsev, V. et al. (2019): CO2 Capture via Crystalline Hydrogen-Bonded Bicarbonate Dimers. In: Chem. DOI: 10.1016/j.chempr.2018.12.025.

"Human activities in the last one and a half centuries have perturbed the natural carbon cycle, shifting massive amounts of carbon from the geosphere into the atmosphere and leading to climate change at an unprecedented pace. [...] Here, we demonstrate a promising approach to CO₂ capture based on crystallization of bicarbonate-water clusters with a simple guanidine compound. The CO₂ separation cycle involves a unique proton-transfer mechanism via the formation of a carbonic acid dimer, leading to efficient CO₂ release and quantitative regeneration of the guanidine compound and requiring significantly less energy than state-of-the-art carbon-capture technologies."

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