March 2017

27.03.2017

# Media

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the guardian: Trump presidency 'opens door' to planet-hacking geoengineer experiments

"As geoengineer advocates enter Trump administration, plans advance to spray sun-reflecting chemicals into atmosphere"

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27.03.2017

# New Publications

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Montserrat, Francesc; et al. (2017): Olivine Dissolution in Seawater: Implications for CO2 Sequestration through Enhanced Weathering in Coastal Environments

Montserrat, Francesc; Renforth, Phil; Hartmann, Jens; Leermakers, Martine; Knops, Pol; Meysman, Filip J. R. (2017): Olivine Dissolution in Seawater: Implications for CO2 Sequestration through Enhanced Weathering in Coastal Environments. In Environ. Sci. Technol. DOI: 10.1021/acs.est.6b05942.

"Here, we present results from batch reaction experiments, in which forsteritic olivine was subjected to rotational agitation in different seawater media for periods of days to months. Olivine dissolution caused a significant increase in alkalinity of the seawater with a consequent DIC increase due to CO2 invasion, thus confirming viability of the basic concept of enhanced silicate weathering."

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27.03.2017

# Projects

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New Blog: OLIVOA (Enhanced Olivine Weathering)

"OLIvOA is a research initiative investigating the use of enhanced weathering of the silicate mineral olivine against Ocean Acidification. Olivine weathering causes the seawater to become less acidic and increases its capacity to take up (more) carbon dioxide (CO2). OLIvOA 'headquarters' is currently located in Brazil, but collaborates with researchers from all over the world. The epicenter of OLIvOA research is (still) in Europe."

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24.03.2017

# Media

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Cicero: Former UN climate advisor leads initiative to regulate geo-engineering

"Geo-engineering can be a cheap way of instantly lowering the Earth’s temperature - with potentially devastating side effects. The technology is here but international regulation is lacking."

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24.03.2017

# New Publications

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Rockström, Johan; et al. (2017): A roadmap for rapid decarbonization

Rockström, Johan; Gaffney, Owen; Rogelj, Joeri; Meinshausen, Malte; Nakicenovic, Nebojsa; Schellnhuber, Hans Joachim (2017): A roadmap for rapid decarbonization. In Science 355 (6331), pp. 1269–1271. DOI: 10.1126/science.aah3443.

Including negative emissions/BECCS. "Complemented by immediately instigated, scalable carbon removal and efforts to ramp down land-use CO2 emissions, this can lead to net-zero emissions around mid-century, a path necessary to limit warming to well below 2°C."

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24.03.2017

# New Publications

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Lenton, Andrew; et al. (2017): How Will Earth Respond to Plans for Carbon Dioxide Removal?

Lenton, Andrew; Keller, David; Pfister, Patrik (2017): How Will Earth Respond to Plans for Carbon Dioxide Removal? In Eos. DOI: 10.1029/2017EO068385.

Meeting Report. "First Workshop of the Carbon Dioxide Removal Model Intercomparison Project; Potsdam, Germany, 20–22 September 2016"

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24.03.2017

# Media

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MIT Technology Review: Harvard Scientists Moving Ahead on Plans for Atmospheric Geoengineering Experiments

"The climate researchers intend to launch a high-altitude balloon that would spray a small quantity of reflective particles into the stratosphere."

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24.03.2017

# Media

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the guardian: US scientists launch world's biggest solar geoengineering study

"Research programme will send aerosol injections into the earth’s upper atmosphere to study the risks and benefits of a future solar tech-fix for climate change"

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23.03.2017

# Media

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Wall St Daily: “Earth Hackers” Adopt Radical Methods to Stop Climate Change

"The field of geoengineering aims to alter the Earth’s environment on purpose to reverse global warming."

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22.03.2017

# New Publications

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Visioni, Daniele; et al. (2017): Sulfate geoengineering. A review of the factors controlling the needed injection of sulfur dioxide

Visioni, Daniele; Pitari, Giovanni; Aquila, Valentina (2017): Sulfate geoengineering. A review of the factors controlling the needed injection of sulfur dioxide. In Atmos. Chem. Phys 17 (6), pp. 3879–3889. DOI: 10.5194/acp-17-3879-2017.

"A review of previous studies on these effects is presented here, with an outline of the important factors that control the amount of sulfur dioxide to be injected in an eventual realization of the experiment. However, we need to take into account that atmospheric models used for these studies have shown a wide range of climate sensitivity and differences in the response to stratospheric volcanic aerosols. In addition, large uncertainties exist in the estimate of some of these aerosol effects."

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