13.05.2018

# New Publications

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Werner, Constanze; et al. (2018): Biogeochemical potential of biomass pyrolysis systems for limiting global warming to 1.5 °C

Werner, Constanze; Schmidt, H-P; Gerten, Dieter; Lucht, Wolfgang; Kammann, C. (2018): Biogeochemical potential of biomass pyrolysis systems for limiting global warming to 1.5 °C. In Environ. Res. Lett. 13 (4), p. 44036. DOI: 10.1088/1748-9326/aabb0e.

"Negative emission (NE) technologies are recognized to play an increasingly relevant role in strategies limiting mean global warming to 1.5 °C as specified in the Paris Agreement. The potentially significant contribution of pyrogenic carbon capture and storage (PyCCS) is, however, highly underrepresented in the discussion. In this study, we conduct the first quantitative assessment of the global potential of PyCCS as a NE technology based on biomass plantations. Using a process-based biosphere model, we calculate the land use change required to reach specific climate mitigation goals while observing biodiversity protection guardrails. We consider NE targets of 100–300 GtC following socioeconomic pathways consistent with a mean global warming of 1.5 °C as well as the option of additional carbon balancing required in case of failure or delay of decarbonization measures."

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05.02.2018

# New Publications

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Tan, Raymond R.; et al. (2018): Graphical Pinch Analysis for Planning Biochar-Based Carbon Management Networks

Tan, Raymond R.; Bandyopadhyay, Santanu; Foo, Dominic C. Y. (2018): Graphical Pinch Analysis for Planning Biochar-Based Carbon Management Networks. In Process Integr Optim Sustain 18 (5), p. 1457. DOI: 10.1007/s41660-018-0033-6.

"Biochar is a potentially scalable negative emission technology (NET). The negative net flow of carbon is achieved sequentially via photosynthesis which fixes atmospheric carbon into biomass, followed by thermochemical processing of biomass into biochar which converts the bulk of the fixed carbon into stable or recalcitrant form, and finally by the application of the resulting biochar to soil. In addition, this process can result in additional carbon offsets through favorable modification of soil by reducing fertilizer requirement, as well as other secondary benefits. On the other hand, biochar is typically contaminated with traces of organic (e.g., dioxins) and inorganic impurities (e.g., salts) that are detrimental to soil quality."

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31.12.2017

# New Publications

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Li, Yongfu; et al. (2017): Effects of biochar application in forest ecosystems on soil properties and greenhouse gas emissions. A review

Li, Yongfu; Hu, Shuaidong; Chen, Junhui; Müller, Karin; Li, Yongchun; Fu, Weijun et al. (2017): Effects of biochar application in forest ecosystems on soil properties and greenhouse gas emissions. A review. In J Soils Sediments 202–203 (Part 2), p. 183. DOI: 10.1007/s11368-017-1906-y.

"Here, we review and summarize the available literature on the effects of biochar on soil properties and GHG emissions in forest soils."

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03.10.2017

# Political Papers

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New Carbon Economy Consortium (2017): Building Research Programs to Support 21st Century Economic Opportunity

New Carbon Economy Consortium (2017): Building Research Programs to Support 21st Century Economic Opportunity. Arizona State University. Tempe.

"Now is the time to map paths to the breakthrough research programs and forward-looking university-business partnerships that will serve as the hubs for this new carbon economy. This is an economy in which low-carbon industry and primary energy production are joined by industrial centers, agricultural regions and food-producing ecosystems that turn excess CO2 into consumer goods, fuels, building materials and fertile soil. With deliberate but ambitious planning, the United States and collaborators in other countries can develop the knowledge, technologies and human capital to catalyze the new carbon economy by 2040."

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09.05.2017

# New Publications

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Fidel, Rivka B.; et al. (2017): Impact of Biochar Organic and Inorganic Carbon on Soil CO2 and N2O Emissions

Fidel, Rivka B.; Laird, David A.; Parkin, Timothy B. (2017): Impact of Biochar Organic and Inorganic Carbon on Soil CO2 and N2O Emissions. In: Journal of environmental quality. DOI: 10.2134/jeq2016.09.0369.

"Here we therefore aim to assess biochar organic and inorganic C pool impacts on CO2 and N2O emissions from soil amended with two untreated biochars, inorganic carbon (as Na2CO3), acid (HCl) and bicarbonate (NaHCO3) extracts of the biochars, and acid and bicarbonate/acid-washed biochars during a 140-d soil incubation. We hypothesized that (i) both biochar labile organic carbon (LOC) and inorganic carbon (IC) pools contribute significantly to short-term (<1 mo) CO2 emissions from biochar-amended soil, (ii) biochars will influence the size of soil NH4+ and NO3 pools, and (iii) changes in soil inorganic N pools will affect soil N2O emissions."

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04.05.2017

# New Publications

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Boysen, Lena R.; et al. (2017): Trade-offs for food production, nature conservation and climate limit the terrestrial carbon dioxide removal potential

Boysen, Lena R.; Lucht, Wolfgang; Gerten, Dieter (2017): Trade-offs for food production, nature conservation and climate limit the terrestrial carbon dioxide removal potential. In Glob Chang Biol. DOI: 10.1111/gcb.13745.

"We integrate these factors in one spatially explicit biogeochemical simulation framework to explore the tCDR opportunity space on land available after these constraints are taken into account, starting either in 2020 or 2050, and lasting until 2100. We find that assumed future needs for nature protection and food production strongly limit tCDR potentials. BPs on abandoned crop and pasture areas (~1300 Mha in scenarios of either 8.0 billion people and yield gap reductions of 25% until 2020 or 9.5 billion people and yield gap reductions of 50% until 2050) could, theoretically, sequester ~100 GtC in land carbon stocks and biomass harvest by 2100."

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18.04.2017

# Media

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Drawdown: Solutions

Solutions from the Drawdown project include biochar and direct air capture.

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18.04.2017

# Media

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Desmog: Biochar Series

"In this series, DeSmog digs into the promise and peril of biochar as a solution to climate change. Authored by Steve Horn, this investigative report is the result of a years-long probe into biochar, geoengineering, and whether it can put a dent in climate change. Learn about the science — and lack thereof — supporting biochar's carbon sequestration potential, the major players and their connections to Big Oil, and the rush to deploy large-scale biochar projects as part of questionable carbon offsets programs. Read the whole series below."

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18.04.2017

# Media

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Desmog: Introducing Biochar: Climate Change Solution or Greenwash Nightmare?

"Momentum on biochar as a climate salvation, for now, has reached a relative standstill. But the industry has already written the playbook for pushing its product, and should that momentum turn around in the months and years ahead, the biggest question will be: Can research confirm biochar's potential as a climate change solution, or is it just another form of greenwashing?"

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27.10.2016

# New Publications

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Woolf, Dominic; et al. (2016): Optimal bioenergy power generation for climate change mitigation with or without carbon sequestration

Woolf, Dominic; Lehmann, Johannes; Lee, David R. (2016): Optimal bioenergy power generation for climate change mitigation with or without carbon sequestration. In nature communications 7. DOI 10.1038/ncomms13160.

"Although bioenergy-biochar systems (BEBCS) can also deliver CDR, they are not included in any IPCC scenario. Here we show that despite BECCS offering twice the carbon sequestration and bioenergy per unit biomass, BEBCS may allow earlier deployment of CDR at lower carbon prices when long-term improvements in soil fertility offset biochar production costs."

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