CO₂-removal News

Peer-reviewed Publications

Manoussi, Vassiliki; Xepapadeas, Anastasios (2015): Cooperation and Competition in Climate Change Policies. Mitigation and Climate Engineering when Countries are Asymmetric

Manoussi, Vassiliki; Xepapadeas, Anastasios (2015): Cooperation and Competition in Climate Change Policies. Mitigation and Climate Engineering when Countries are Asymmetric. In Environ Resource Econ. DOI: 10.1007/s10640-015-9956-3

„We study a dynamic game of climate policy design in terms of emissions and solar radiation management (SRM) involving two heterogeneous countries or group of countries. Countries emit greenhouse gasses (GHGs), and can block incoming radiation by unilateral SRM activities, thus reducing global temperature. Heterogeneity is modelled in terms of the social cost of SRM, the environmental damages due to global warming, the productivity of emissions in terms of generating private benefits, the rate of impatience, and the private cost of geoengineering.“

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Media

BERC: Carbon Removal As a Mitigation Strategy

„Carbon removal techniques, while important for fighting climate change, have faced resistance from some in the environmental community due to their perception as a threat to the deployment of other climate change[nbsp]mitigation techniques. Recently, the view that carbon removal is a complement,[nbsp]not a substitute, for[nbsp]other mitigation approaches has gained mainstream acceptance — a positive development that will hopefully help carbon removal solutions emerge in sustainable and appropriate manner for fighting climate change.“

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Media

Harvard Political Review: Engineering The Climate

„In early July, in Germany’s historic Berlin-Brandenburg Academy of Sciences and Humanities, academics and analysts from a wide range of disciplines gathered to participate in a research symposium on climate engineering. The fledgling field—only some of those present at the conference even consider climate engineering to be their primary research interest—has steadily been picking up momentum over the past decade.“

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Peer-reviewed Publications

Mengis, N.; et al. (2015): Uncertainty in the response of transpiration to CO2 and implications for climate change

Mengis, Nadine; Keller, David P.; Eby, M.; Oschlies, Andreas (2015): Uncertainty in the response of transpiration to CO2 and implications for climate change. In Environ. Res. Lett. 10 (9), p. 94001–94001. DOI 10.1088/1748-9326/10/9/094001

Paper from PP 1689. „To assess the impact of this uncertainty on future climate, we perform experiments with an intermediate complexity Earth System Climate Model (UVic ESCM) for a range of model-imposed transpiration-sensitivities to CO2. Changing the sensitivity of transpiration to CO2 causes simulated terrestrial precipitation to change by −10% to +27% by 2100 under a high emission scenario. This study emphasises the importance of an improved assessment of the dynamics of environmental impact on vegetation to better predict future changes of the terrestrial hydrological and carbon cycles.“

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Peer-reviewed Publications

Bellamy, R.; Lezaun, J. (2015): Crafting a public for geoengineering

Bellamy, R.; Lezaun, J. (2015): Crafting a public for geoengineering. In Public Understanding of Science. DOI 10.1177/0963662515600965[nbsp]

„Here, we analyse this rapid trajectory of publicization and explore the particular manner in which the possibility of intentionally altering the Earth’s climate system to curb global warming has been incorporated into the field of ‘public engagement with science’. We describe the initial framing of geoengineering as a singular object of debate and subsequent attempts to ‘unframe’ the issue by placing it within broader discursive fields.“

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Peer-reviewed Publications

V. N. Aswathy; et al. (2015): Climate extremes in multi-model simulations of stratospheric aerosol and marine cloud brightening climate engineering

V. N. Aswathy; Boucher, O.; Quaas, M.; Niemeier, U.; Muri, H.; Mülmenstädt, J.; Quaas, J. (2015): Climate extremes in multi-model simulations of stratospheric aerosol and marine cloud brightening climate engineering. In Atmos. Chem. Phys. 15 (16), pp. 9593–9610. DOI 10.5194/acp-15-9593-2015 (final paper)

„Simulations from a multi-model ensemble for the RCP4.5 climate change scenario for the 21st century, and for two solar radiation management (SRM) schemes (stratospheric sulfate injection (G3), SULF and marine cloud brightening by sea salt emission SALT) have been analysed in terms of changes in the mean and extremes of surface air temperature and precipitation. The climate engineering and termination periods are investigated. During the climate engineering period, both schemes, as intended, offset temperature increases by about 60 % globally, but are more effective in the low latitudes and exhibit some residual warming in the Arctic (especially in the case of SALT which is only applied in the low latitudes).„

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Peer-reviewed Publications

Sánchez, Joan-Pau; McInnes, Colin R. (2015): Optimal Sunshade Configurations for Space-Based Geoengineering near the Sun-Earth L1 Point

Sánchez, Joan-Pau; McInnes, Colin R. (2015): Optimal Sunshade Configurations for Space-Based Geoengineering near the Sun-Earth L1 Point. In PloS one 10 (8), pp. e0136648. DOI 10.1371/journal.pone.0136648[nbsp][nbsp]

„In particular, the paper revisits the concept of deploying a large sunshade or occulting disk at a static position near the Sun-Earth L1 Lagrange equilibrium point. Among the solar radiation management methods that have been proposed thus far, space-based concepts are generally seen as the least timely, albeit also as one of the most efficient.“

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Projects

Project: Mechanism and Impacts of Geoengineering (China)

New project in China.

„In light of the difficulties in achieving emission control,[nbsp]serious consequences of „business as usual“[nbsp](Fig. 2) and urgency of approaching climatic ‘tipping point’, SRM seems to be the only feasible option mitigating global warming in a short time (Fig. 3), but the uncertainty of basic mechanism and potential impacts of SRM are so huge, that we absolutely can’t do any experiment on our real planet, instead we use computer modeling as our only way to improve our understanding of geoengineering.“

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