13.07.2020

# Media

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Phys.org: Applying rock dust to croplands could absorb up to 2 billion tonnes of CO2 from the atmosphere

"In the first nation-by-nation assessment, published in Nature, scientists have demonstrated the method's potential for carbon drawdown by major economies, and identified the costs and engineering challenges of scaling up the approach to help meet ambitious global CO2 removal targets."

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09.07.2020

# New Publications

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Beerling, David J.; et al. (2020): Potential for large-scale CO2 removal via enhanced rock weathering with croplands

Beerling, David J.; Kantzas, Euripides P.; Lomas, Mark R.; Wade, Peter; Eufrasio, Rafael M.; Renforth, Phil et al. (2020): Potential for large-scale CO2 removal via enhanced rock weathering with croplands. In Nature 583 (7815), pp. 242–248. DOI: 10.1038/s41586-020-2448-9.

"Here we use an integrated performance modelling approach to make an initial techno-economic assessment for 2050, quantifying how CDR potential and costs vary among nations in relation to business-as-usual energy policies and policies consistent with limiting future warming to 2 degrees Celsius."

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09.07.2020

# New Publications

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Cox, Emily; et al. (2020): Public perceptions of carbon dioxide removal in the United States and the United Kingdom

Cox, Emily; Spence, Elspeth; Pidgeon, Nick (2020): Public perceptions of carbon dioxide removal in the United States and the United Kingdom. In Nat. Clim. Chang. DOI: 10.1038/s41558-020-0823-z.

"Here we report a mixed-methods study on public perceptions of CDR in the United States and the United Kingdom, focusing on bioenergy with carbon capture and storage, direct air capture and terrestrial enhanced rock weathering."

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06.07.2020

# New Publications

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Noah McQueen; et al. (2020): Ambient weathering of magnesium oxide for CO 2 removal from air

Noah McQueen; Peter Kelemen; Greg Dipple; Phil Renforth; Jennifer Wilcox (2020): Ambient weathering of magnesium oxide for CO 2 removal from air. In Nat Commun 11. DOI: 10.1038/s41467-020-16510-3.

"Here we detail a land-based enhanced weathering cycle utilizing magnesite (MgCO3) feedstock to repeatedly capture CO2 from the atmosphere. In this process, MgCO3 is calcined, producing caustic magnesia (MgO) and high-purity CO2."

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08.06.2020

# Media

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Abendblatt: How CO2 can be removed from the atmosphere

A German newspaper article about University of Hamburg research on enhanced weathering.

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18.05.2020

# New Publications

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Amann, Thorben; et al. 2020: “Enhanced Weathering and Related Element Fluxes – a Cropland Mesocosm Approach.”

Amann, Thorben, Jens Hartmann, Eric Struyf, Wagner de Oliveira Garcia, Elke K. Fischer, Ivan Janssens, Patrick Meire, and Jonas Schoelynck. 2020: “Enhanced Weathering and Related Element Fluxes – a Cropland Mesocosm Approach.” Biogeosciences 17 (1): 103–19. https://doi.org/10.5194/bg-17-103-2020.

‌"In order to evaluate the efficiency and side effects of Enhanced Weathering (EW), a mesocosm experiment was set up and agricultural soil from Belgium was amended with olivine-bearing dunite ground to two different grain sizes, while distinguishing setups with and without crops."

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24.04.2020

# New Publications

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Clark, Deirdre E.; et al. 2020: “CarbFix2: CO2 and H2S Mineralization during 3.5 years of Continuous Injection into Basaltic Rocks at More than 250 °C.”

Clark, Deirdre E., Eric H. Oelkers, Ingvi Gunnarsson, Bergur Sigfússon, Sandra Ó. Snæbjörnsdóttir, Edda S. Aradóttir, and Sigurður R. Gíslason. 2020: “CarbFix2: CO2 and H2S Mineralization during 3.5 years of Continuous Injection into Basaltic Rocks at More than 250 °C.” Geochimica et Cosmochimica Acta 279 (June): 45–66. https://doi.org/10.1016/j.gca.2020.03.039.

‌"The CarbFix method was upscaled at the Hellisheiði geothermal power plant to inject and mineralize the plant’s CO2 and H2S emissions in June 2014. This approach first captures the gases by their dissolution in water, and the resulting gas-charged water is injected into subsurface basalts. "

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22.04.2020

# New Publications

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Haque, Fatima; et al. 2020: “CO2 Sequestration by Wollastonite-Amended Agricultural Soils – An Ontario Field Study.”

Haque, Fatima, Rafael M. Santos, and Yi Wai Chiang. 2020: “CO2 Sequestration by Wollastonite-Amended Agricultural Soils – An Ontario Field Study.” International Journal of Greenhouse Gas Control 97 (June 2020): 103017. https://doi.org/10.1016/j.ijggc.2020.103017.

"In the present study, wollastonite-amended soils were collected from three commercial-scale fields located in Ontario: a leafy vegetables farm in the town of Paris (Field 1); a potato farm in the settlement of Alliston (Field 2); and a soybean farm in the city of Woodstock (Field 3). Chemical and mineralogical assessments of these soils were conducted to determine their carbonate content and the fate of the wollastonite."

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22.04.2020

# New Publications

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de Oliveira Garcia, Wagner; et al. 2020: “Impacts of Enhanced Weathering on Biomass Production for Negative Emission Technologies and Soil Hydrology.”

de Oliveira Garcia, Wagner, Thorben Amann, Jens Hartmann, Kristine Karstens, Alexander Popp, Lena R. Boysen, Pete Smith, and Daniel Goll. 2020: “Impacts of Enhanced Weathering on Biomass Production for Negative Emission Technologies and Soil Hydrology.” Biogeosciences 17 (7): 2107–33. https://doi.org/10.5194/bg-17-2107-2020.

‌"Here, we investigate the deployment of enhanced weathering (EW) to supply nutrients to areas of afforestation–reforestation and naturally growing forests (AR) and bioenergy grasses (BG) that are deficient in phosphorus (P), besides the impacts on soil hydrology. Using stoichiometric ratios and biomass estimates from two established vegetation models, we calculated the nutrient demand of AR and BG."

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23.03.2020

# New Publications

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Zeng, Sibo, et al. 2019: “Sensitivity of the Global Carbonate Weathering Carbon-Sink Flux to Climate and Land-Use Changes.”

Zeng, Sibo, Zaihua Liu, and Georg Kaufmann. 2019: “Sensitivity of the Global Carbonate Weathering Carbon-Sink Flux to Climate and Land-Use Changes.” Nature Communications 10 (1). https://doi.org/10.1038/s41467-019-13772-4.

‌"Here, we show that there is likely to be a widespread and consistent increase in the global CCSF (ranging from + 9.8% (RCP4.5) to + 17.1% (RCP8.5)) over the period 1950–2100."

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