March 2019

18.03.2019

# Media

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Reuters: Proposal for U.N. to study climate-cooling technologies rejected

"A push to launch a high-level study of potentially risky technological fixes to curb climate change was abandoned on Thursday at a U.N. environmental conference in Nairobi, as countries including the United States raised objections."

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18.03.2019

# Calls & events

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Call for Abstracts: The Achieving Net Zero Conference

Deadline: 8. April 2019

"Deadline for submitting abstracts is Monday 8th April. Applicants will be be notified by Thursday 18th April."

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18.03.2019

# New Publications

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Kaya, Y.; et al. (2019): Towards net zero CO2 emissions without relying on massive carbon dioxide removal

Kaya, Y.; Yamaguchi, M.; Geden, O. (2019): Towards net zero CO2 emissions without relying on massive carbon dioxide removal. In: Sustain Sci 354 (5), S. 182. DOI: 10.1007/s11625-019-00680-1.

"Current emission scenarios that allow keeping the global temperature increase below 2 °C or even 1.5 °C—as foreseen by the Paris Agreement—are based on very optimistic assumptions, including enormous volumes of carbon dioxide removal (CDR). A closer look at the globally most important emission sectors—power, transport and industry—shows manifold barriers for very ambitious mitigation."

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18.03.2019

# New Publications

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Erans, M.; et al. (2019): Pilot-scale calcination of limestone in steam-rich gas for direct air capture

Erans, M.; Nabavi, S.; Manović, V. (2019): Pilot-scale calcination of limestone in steam-rich gas for direct air capture. In: Energy Conversion and Management: X, S. 100007. DOI: 10.1016/j.ecmx.2019.100007.

"A novel polygeneration concept, which has been proposed recently, comprises a fuel-cell calciner integrated system in order to produce electricity and lime which can be used for direct air capture (DAC) to remove CO2 from the atmosphere. [...] Moreover, increasing steam concentration during calcination affected the material performance and DAC capacity at ambient conditions positively. Therefore, these findings demonstrate that limestone calcined under typical SOFC afterburner exhaust conditions is suitable as a DAC sorbent."

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18.03.2019

# Media

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The Conversation: Can we tweak marine chemistry to help stave off climate change?

"These foreboding trends have led to an increasing focus on ways to remove carbon dioxide from the atmosphere. Among the methods being explored is the use of the ocean to absorb and/or store carbon by adding crushed rocks or other sources of alkalinity to react with CO2 in seawater, ultimately consuming atmospheric CO2."

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18.03.2019

# Media

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Legal Planet: Governing Geoengineering at the United Nations? No, at Least Not Now

"The proposed geoengineering methods vary but for the most part would either remove carbon dioxide from the atmosphere or make the planet a bit more reflective. Some geoengineering methods have the potential to greatly reduce climate change but also pose physical risks and social challenges. Dedicated governance will eventually be warranted, and given the global stakes, some governance should be international."

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18.03.2019

# New Publications

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Belaia, M. (2019): Optimal Climate Strategy with Mitigation, Carbon Removal, and Solar Geoengineering

Belaia, M. (2019): Optimal Climate Strategy with Mitigation, Carbon Removal, and Solar Geoengineering. Online verfügbar unter http://arxiv.org/pdf/1903.02043v1.

"Until recently, analysis of optimal global climate policy has focused on mitigation. Exploration of policies to meet the 1.5°C target have brought carbon dioxide removal (CDR), a second instrument, into the climate policy mainstream. [...] Here, I extend the Dynamic Integrated model of Climate and Economy (DICE) to include both CDR and SG to explore the temporal ordering of the three instruments. Contrary to implicit assumptions that SG would be employed only after mitigation and CDR are exhausted, I find that SG is introduced parallel to mitigation temporary reducing climate risks during the era of peak CO2 concentrations."

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18.03.2019

# Media

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Harvard University Blog: FAQ on idealized solar geoengineering moderates key climate hazards

"This post provides some color commentary as an FAQ about “Halving warming with idealized solar geoengineering moderates key climate hazards”, published 11 March 2019 in Nature Climate Change. [...]This feels like the most important solar geoengineering (SG) study I have been lucky to be a part of. From my perspective, it’s more important and should get more attention than progress on our stratospheric experiment."

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17.03.2019

# New Publications

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GESAMP (2019): High level review of a wide range of proposed marine geoengineering techniques

GESAMP (2019): High level review of a wide range of proposed marine geoengineering techniques. GESAMP Working Group 41. (Boyd P. and Vivian C. eds.)(98).

"This report comprehensively examines a wide range o marine geoengineering techniques to remove carbon dioxide from the atmosphere or boost the reflection of incoming solar radiation to space (albedo modification) or in some cases both. Further, the report recommends a) that a coordinated framework for proposing marine geoengineering activities, submitting supporting evidence and integrating independent expert assessment must be developed and b) that a greater expertise on wider societal issues is sought with the aim to establish a knowledge base and provide a subsequent analysis of the major gaps in socio-economics and geopolitics."

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17.03.2019

# Media

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CarbonBrief: Halving global warming with solar geoengineering could ‘offset tropical storm risk’

"Engineering the climate to reflect away sunlight could halve global warming and offset the risk of increases in tropical storms, new research suggests."

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