19.11.2017

# New Publications

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Zomer, Robert J.; et al. (2017): Global Sequestration Potential of Increased Organic Carbon in Cropland Soils

Zomer, Robert J.; Bossio, Deborah A.; Sommer, Rolf; Verchot, Louis V. (2017): Global Sequestration Potential of Increased Organic Carbon in Cropland Soils. In Scientific reports 7 (1), p. 15554. DOI: 10.1038/s41598-017-15794-8.

"The importance of intensively cultivated regions such as North America, Europe, India and intensively cultivated areas in Africa, such as Ethiopia, is highlighted. Soil carbon sequestration and the conservation of existing soil carbon stocks, given its multiple benefits including improved food production, is an important mitigation pathway to achieve the less than 2 °C global target of the Paris Climate Agreement."

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16.11.2017

# New Publications

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Jones, Anthony C.; et al. (2017): Impacts of hemispheric solar geoengineering on tropical cyclone frequency

Jones, Anthony C.; Haywood, James M.; Dunstone, Nick; Emanuel, Kerry; Hawcroft, Matthew K.; Hodges, Kevin I.; Jones, Andy (2017): Impacts of hemispheric solar geoengineering on tropical cyclone frequency. In Nat Comms 8 (1), p. 1382. DOI: 10.1038/s41467-017-01606-0.

"Observations following major volcanic eruptions indicate that aerosol enhancements confined to a single hemisphere effectively modulate North Atlantic tropical cyclone (TC) activity in the following years. Here we investigate the effects of both single-hemisphere and global SAI scenarios on North Atlantic TC activity using the HadGEM2-ES general circulation model and various TC identification methods."

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16.11.2017

# New Publications

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Carr, Wylie; Preston, Christopher J. (2017): Skewed Vulnerabilities and Moral Corruption in Global Perspectives on Climate Engineering

Carr, Wylie; Preston, Christopher J. (2017): Skewed Vulnerabilities and Moral Corruption in Global Perspectives on Climate Engineering. In environ values 26 (6), pp. 757–777. DOI: 10.3197/096327117X15046905490371.

"The research presented in this paper was designed to build knowledge about how vulnerable populations think about climate engineering. The goal of this manuscript is to bring the ethics literature on climate engineering into dialogue with emerging social science data documenting the perspectives of vulnerable populations. The results indicate some concerns among vulnerable populations may resemble those outlined by ethicists."

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14.11.2017

# New Publications

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Heutel, Garth; et al. (2017): Solar Geoengineering, Uncertainty, and the Price of Carbon

Heutel, Garth; Moreno-Cruz, Juan; Shayegh, Soheil (2017): Solar Geoengineering, Uncertainty, and the Price of Carbon. In Journal of Environmental Economics and Management. DOI: 10.1016/j.jeem.2017.11.002.

"We consider the socially optimal use of solar geoengineering to manage climate change and its implications for carbon emissions abatement policy. We show that solar geoengineering is a substitute for emissions abatement; optimal policy includes less abatement, by up to eight percentage points, and has a lower carbon price, by up to fifteen percent, than recommended by models that ignore solar geoengineering. However, it is an imperfect substitute, since it reduces temperature without reducing atmospheric or ocean carbon concentrations."

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12.11.2017

# New Publications

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Herrera-Gomez, Sergio S.; et al. (2017): The role of green roofs in climate change mitigation. A case study in Seville (Spain)

Herrera-Gomez, Sergio S.; Quevedo-Nolasco, Abel; Pérez-Urrestarazu, Luis (2017): The role of green roofs in climate change mitigation. A case study in Seville (Spain). In Building and Environment 123, pp. 575–584. DOI: 10.1016/j.buildenv.2017.07.036.

"Estimating the green roof area required to buffer negative effects of climate change. Inverse relationship between land surface temperature and abundance of vegetation."

 

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12.11.2017

# New Publications

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McGee, Jeffrey; et al. (2017): Geoengineering the oceans. An emerging frontier in international climate change governance

McGee, Jeffrey; Brent, Kerryn; Burns, Wil (2017): Geoengineering the oceans. An emerging frontier in international climate change governance. In Australian Journal of Maritime & Ocean Affairs 8 (2), pp. 1–14. DOI: 10.1080/18366503.2017.1400899.

"The world's oceans could play an important role in meeting international climate change targets. ‘Marine geoengineering’ is being proposed to enhance the oceans capacity to sequester emissions and enhance the Earth's albedo. This article draws on discussions at a recent Marine Geoengineering Symposium held at the University of Tasmania to highlight prominent marine geoengineering proposals and raise questions about the readiness of the international law system to govern further research and implementation of these ideas."

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08.11.2017

# New Publications

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Mills, Michael J.; et al. (2017): Radiative and chemical response to interactive stratospheric sulfate aerosols in fully coupled CESM1(WACCM)

Mills, Michael J.; Richter, Jadwiga H.; Tilmes, Simone; Kravitz, Ben; MacMartin, Douglas G.; Glanville, Anne A. et al. (2017): Radiative and chemical response to interactive stratospheric sulfate aerosols in fully coupled CESM1(WACCM). In J. Geophys. Res. Atmos. DOI: 10.1002/2017JD027006.

"We present new insights into the evolution and interactions of stratospheric aerosol using an updated version of the Whole Atmosphere Community Climate Model (WACCM). Improved horizontal resolution, dynamics, and chemistry now produce an internally generated quasi-biennial oscillation, and significant improvements to stratospheric temperatures and ozone compared to observations. We present a validation of WACCM column ozone and climate calculations against observations. "

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08.11.2017

# New Publications

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Tilmes, Simone; et al. (2017): Sensitivity of aerosol distribution and climate response to stratospheric SO2 injection locations

Tilmes, Simone; Richter, Jadwiga H.; Mills, Michael J.; Kravitz, Ben; MacMartin, Douglas G.; Vitt, Francis et al. (2017): Sensitivity of aerosol distribution and climate response to stratospheric SO2 injection locations. In J. Geophys. Res. Atmos. DOI: 10.1002/2017JD026888.

"Here, we use CESM1(WACCM) to explore the impact of continuous single grid point SO2 injections at 7 different latitudes and 2 altitudes in the stratosphere on aerosol distribution and climate. For each of the 14 locations, 3 different constant SO2 emission rates were tested to identify linearity in aerosol burden, aerosol optical depth, and climate effects. We found that injections at 15° N and 15° S and at 25 km altitude have equal or greater effect on radiation and surface temperature than injections at the equator."

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08.11.2017

# New Publications

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Richter, Jadwiga H.; et al. (2017): Stratospheric Dynamical Response and Ozone Feedbacks in the Presence of SO2 Injections

Richter, Jadwiga H.; Tilmes, Simone; Mills, Michael J.; Tribbia, Joseph J.; Kravitz, Ben; MacMartin, Douglas G. et al. (2017): Stratospheric Dynamical Response and Ozone Feedbacks in the Presence of SO2 Injections. In J. Geophys. Res. Atmos. DOI: 10.1002/2017JD026912.

"We explore here the stratospheric dynamical response to sulfur dioxide injections ∼ 5 km above the tropopause at multiple latitudes (equator, 15° S, 15° N, 30° S and 30° N) using a fully coupled Earth system model, Community Earth System Model, version 1, with the Whole Atmosphere Community Climate Model as its atmospheric component (CESM1(WACCM)). We find that in all simulations, the tropical lower stratosphere warms primarily between 30° S and 30° N, regardless of injection latitude."

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08.11.2017

# New Publications

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Kravitz, Ben; et al. (2017): First simulations of designing stratospheric sulfate aerosol geoengineering to meet multiple simultaneous climate objective

Kravitz, Ben; MacMartin, Douglas G.; Mills, Michael J.; Richter, Jadwiga H.; Tilmes, Simone; Lamarque, Jean-Francois et al. (2017): First simulations of designing stratospheric sulfate aerosol geoengineering to meet multiple simultaneous climate objectives. In J. Geophys. Res. Atmos. DOI: 10.1002/2017JD026874.

"We describe the first simulations of stratospheric sulfate aerosol geoengineering using multiple injection locations to meet multiple simultaneous surface temperature objectives. Simulations were performed using CESM1(WACCM), a coupled atmosphere-ocean general circulation model with fully interactive stratospheric chemistry, dynamics (including an internally generated quasi-biennial oscillation), and a sophisticated treatment of sulfate aerosol formation, microphysical growth, and deposition."

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