04.05.2018

# New Publications

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Hippel, Ted von (2018): Thermal removal of carbon dioxide from the atmosphere. Energy requirements and scaling issues

Hippel, Ted von (2018): Thermal removal of carbon dioxide from the atmosphere. Energy requirements and scaling issues. In Climatic Change 55 (D12), p. 1763. DOI: 10.1007/s10584-018-2208-0.

"I conduct a system-level study of direct air capture of CO2 using techniques from thermal physics. This system relies on a combination of an efficient heat exchanger, radiative cooling, and refrigeration, all at industrial scale and operated in environments at low ambient temperatures. While technological developments will be required for such a system to operate efficiently, those developments rest on a long history of refrigeration expertise and technology, and they can be developed and tested at modest scale. I estimate that the energy required to remove CO2 via this approach is comparable to direct air capture by other techniques. The most challenging aspect of building a system that could remove 1 billion tonnes of CO2 from the atmosphere per year is the power demand of 112 to 420 GW during the wintertime operational period."

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04.05.2018

# New Publications

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Geden, Oliver; et al. (2018): Integrating carbon dioxide removal into EU climate policy. Prospects for a paradigm shift

Geden, Oliver; Scott, Vivian; Palmer, James (2018): Integrating carbon dioxide removal into EU climate policy. Prospects for a paradigm shift. In WIREs Clim Change 354 (1), e521. DOI: 10.1002/wcc.521.

"Here we explore the political dimensions and policy implications of expectations for “negative emissions” in the European Union (EU), considering its largely successful leadership role in mitigation action and corresponding low‐carbon technology development and deployment. Carbon dioxide removal and especially Bio‐Energy with Carbon Capture and Storage present significant challenges to the EU's dominant climate policy paradigm and low‐carbon policy experience. Considering this challenge, we assess expectations for widespread implementation of carbon dioxide removal in the EU to be unrealistic, and explore possible pathways for its more limited introduction."

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02.05.2018

# Media

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Huffington Post: The Dangerous Belief That Extreme Technology Will Fix Climate Change

"Scientists have proposed solar radiation management, as it’s called, for decades as a form of global-scale geoengineering that could combat global warming. But few have done what Smith, a partner at a private equity firm and former airline executive, has done ― turned pie-in-the-sky, back-of-the-envelope calculations into a full-fledged feasibility study, complete with a development and operating budget for his fleet of planes."

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30.04.2018

# Calls & events

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Newsletter of Week 18 of 2018

The newsletter of calendar week 18 in 2018 is now available here.


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30.04.2018

# Media

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ecoRI News: Time to Start Using the Climate Tools We Have

"Too much carbon dioxide in the atmosphere is the primary cause of climate change. To stop climate change, we need to stop adding CO2 to the atmosphere and start taking it out. With renewable energy and direct-air CO2 capture, we can do both, and we can do them in ways that save money."

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30.04.2018

# Media

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New York Times: How Oman’s Rocks Could Help Save the Planet

"Scientists say that if this natural process, called carbon mineralization, could be harnessed, accelerated and applied inexpensively on a huge scale — admittedly some very big “ifs” — it could help fight climate change. Rocks could remove some of the billions of tons of heat-trapping carbon dioxide that humans have pumped into the air since the beginning of the Industrial Age."

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30.04.2018

# Media

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Nature (Correspondence): Geoengineering might speed glacier melt

Moon, Twila A. (2018): Geoengineering might speed glacier melt. In Nature 556 (7702), p. 436. DOI: 10.1038/d41586-018-04897-5.

"We disagree with John Moore and colleagues that geoengineering could counter rising sea levels from the melting of the Greenland and Antarctic ice sheets (Nature 555, 303–305; 2018). As environmental researchers in these regions, we contend that the consequences of the technology could be even more serious than in its absence."

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27.04.2018

# New Publications

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Rickels, W.; et al. (2018): Integrated Assessment of Carbon Dioxide Removal

Rickels, W.; Reith, F.; Keller, D.; Oschlies, A.; Quaas, M. F. (2018): Integrated Assessment of Carbon Dioxide Removal. In Earth's Future 6 (3), pp. 565–582. DOI: 10.1002/2017EF000724.

"We analyze optimal and cost-effective climate policies in the dynamic integrated assessment model (IAM) of climate and the economy (DICE2016R) and investigate (1) the utilization of (ocean) CDR under different climate objectives, (2) the sensitivity of policies with respect to carbon cycle feedbacks, and (3) how well carbon cycle feedbacks are captured in the carbon cycle models used in state-of-the-art IAMs."

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27.04.2018

# New Publications

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Fajardy, Mathilde; Mac Dowell, Niall (2018): The energy return on investment of BECCS. Is BECCS a threat to energy security?

Fajardy, Mathilde; Mac Dowell, Niall (2018): The energy return on investment of BECCS. Is BECCS a threat to energy security? In Energy Environ. Sci. 40, p. 401. DOI: 10.1039/C7EE03610H.

"In this contribution, we evaluate the energy return on investment (EROI) of an archetypal BECCS facility. In order to highlight the importance of biomass sourcing, two feedstock scenarios are considered: use of domestic biomass pellets (UK) and import of biomass pellets from Louisiana, USA. We use the Modelling and Optimisation of Negative Emissions Technologies (MONET) framework to explicitly account for growing, pre-treating, transporting and converting the feedstock in a 500 MW BECCS facility. As an example, we illustrate how the net electricity balance (NElB) of a UK-based BECCS facility can be either positive or negative, as a function of supply chain decisions."

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27.04.2018

# Media

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ARD: Geoengineering (German)

German report on climate engineering, featuring interviews with Ulrike Niemeier (Max Planck Institute for Meteorology) and Andreas Oschlies (GEOMAR Helmholtz Centre for Ocean Research). 

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