10.10.2017

# New Publications

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Xia, Lili; et al. (2017): Impacts of stratospheric sulfate geoengineering on tropospheric ozone

Xia, Lili; Nowack, Peer J.; Tilmes, Simone; Robock, Alan (2017): Impacts of stratospheric sulfate geoengineering on tropospheric ozone. In Atmos. Chem. Phys 17 (19), pp. 11913–11928. DOI: 10.5194/acp-17-11913-2017.

"Here, we examine the potential effects of stratospheric sulfate aerosols and solar insolation reduction on tropospheric ozone and ozone at Earth's surface. Ozone is a key air pollutant, which can produce respiratory diseases and crop damage. Using a version of the Community Earth System Model from the National Center for Atmospheric Research that includes comprehensive tropospheric and stratospheric chemistry, we model both stratospheric sulfur injection and solar irradiance reduction schemes, with the aim of achieving equal levels of surface cooling relative to the Representative Concentration Pathway 6.0 scenario."

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13.12.2016

# New Publications

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Keith, David W.; et al. (2016): Stratospheric solar geoengineering without ozone loss

Keith, David W.; Weisenstein, Debra K.; Dykema, John A.; Keutsch, Frank N. (2016): Stratospheric solar geoengineering without ozone loss. In Proc Natl Acad Sci USA, p. 201615572–201615572. DOI 10.1073/pnas.1615572113.

"The combination of emissions cuts and solar geoengineering could reduce climate risks in ways that cannot be achieved by emissions cuts alone: It could keep Earth under the 1.5-degree mark agreed at Paris, and it might stop sea level rise this century. However, this promise comes with many risks. Injection of sulfuric acid into the stratosphere, for example, would damage the ozone layer. Injection of calcite (or limestone) particles rather than sulfuric acid could counter ozone loss by neutralizing acids resulting from anthropogenic emissions, acids that contribute to the chemical cycles that destroy stratospheric ozone. Calcite aerosol geoengineering may cool the planet while simultaneously repairing the ozone layer."

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18.07.2016

# New Publications

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Nowack, Peer Johannes; et al. (2016): Stratospheric ozone changes under solar geoengineering. Implications for UV exposure and air quality. In Atmos. Chem. Phys. 16 (6), pp. 4191–4203. DOI 10.5194/acp-16-

Nowack, Peer Johannes; Abraham, Nathan Luke; Braesicke, Peter; Pyle, John Adrian (2016): Stratospheric ozone changes under solar geoengineering. Implications for UV exposure and air quality. In Atmos. Chem. Phys. 16 (6), pp. 4191–4203. DOI 10.5194/acp-16-4191-2016.

"Here, we present results of a standard SRM modelling experiment in which the incoming solar irradiance is reduced to offset the global mean warming induced by a quadrupling of atmospheric carbon dioxide. For the first time in an atmosphere–ocean coupled climate model, we include atmospheric composition feedbacks for this experiment. While the SRM scheme considered here could offset greenhouse gas induced global mean surface warming, it leads to important changes in atmospheric composition."

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12.04.2016

# New Publications

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Xia, Y.; Hu, Y.; Huang, Y. (2016): Strong modification of stratospheric ozone forcing by cloud and sea ice adjustments

Xia, Y.; Hu, Y.; Huang, Y. (2016): Strong modification of stratospheric ozone forcing by cloud and sea ice adjustments. In Atmos. Chem. Phys. Discuss., pp. 1–20. DOI 10.5194/acp-2016-175.

"We investigate the climatic impact of stratospheric ozone recovery (SOR) with a focus on the surface temperature change in atmosphere-slab-ocean coupled climate simulations. We find that although SOR would cause significant surface warming (global mean: 0.2 K) in a climate free of clouds and sea-ice, it may result in surface cooling (−0.06 K) in the real climate. The results here are especially interesting in that the stratosphere-adjusted radiative forcing is positive in both cases."

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15.05.2012

# Media

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SustainableBuisiness: Geoengineering Solutions Getting Closer, Gates, Branson Funding Them

Short article on promising CE-technologies for business adaption: Air capture, algae-coated buildings, reflective buildings.

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13.03.2012

# Media

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The Atlantic: How Engineering the Human Body Could Combat Climate Change

Human engineering could be less risky than climate engineering, sais S. Matthew Liao.

Links


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16.02.2012

# Projects

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Ministry of the Environment of Japan: Funding of Project “Multidisciplinary Research on Constructing Risk Management Plan for Global Climate Change” (Japanese Language)

Japanese research project with a duration of 5 years beginning this April. The annual budget is about US $3,850,000 (300,000,000 in Japanese yen), totaling more than US 19 million dollars at present exchange rate.

Link (Japanese Language)

General Link (Ministry of the Environment of Japan, English Language)

See here for a rough English-language translation


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03.02.2012

# Calls & events

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Game: Science Museum launches online games about the future of technology

The Science Museum hosts a game on future technologies including a technology scenario of cloud whitening.

Link for Guardian article

Direct Link to the game


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29.11.2011

# Media

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Zeit Online: Geoengineering could be a Plan B in Climate Policy

The article in a German news paper considders CE as a viable plan B.

Link


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