25.08.2021

# New Publications

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Gernon, Thomas M.; et al. (2021): Global chemical weathering dominated by continental arcs since the mid-Palaeozoic

Gernon, Thomas M.; Hincks, Thea K.; Merdith, Andrew S.; Rohling, Eelco J.; Palmer, Martin R.; Foster, Gavin L. et al. (2021): Global chemical weathering dominated by continental arcs since the mid-Palaeozoic. In: Nat. Geosci. 28, S. 611. DOI: 10.1038/s41561-021-00806-0.

"Earth’s plate-tectonic activity regulates the carbon cycle and, hence, climate, via volcanic outgassing and silicate-rock weathering. Mountain building, arc–continent collisions and clustering of continents in the tropics have all been invoked as controlling the weathering flux, with arcs also acting as a major contributor of carbon dioxide to the atmosphere. However, these processes have largely been considered in isolation when in reality they are all tightly coupled. To properly account for interactions among these processes, and the inherent multi-million-year time lags at play in the Earth system, we need to characterize their complex interdependencies. Here we analyse these interdependencies over the past 400 million years using a Bayesian network to identify primary relationships, time lags and drivers of the global chemical weathering signal."

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20.08.2021

# New Publications

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Vakilifard, Negar; et al. (2021): The role of enhanced rock weathering deployment with agriculture in limiting future warming and protecting coral reefs

Vakilifard, Negar; Kantzas, Euripides P.; Neil R, Edwards; Holden, Philip B.; Beerling, David J. (2021): The role of enhanced rock weathering deployment with agriculture in limiting future warming and protecting coral reefs. In Environ. Res. Lett. 16 (9), p. 94005. DOI: 10.1088/1748-9326/ac1818.

"Meeting the net-zero carbon emissions commitments of major economies by mid-century requires large-scale deployment of negative emission technologies (NETs). Terrestrial enhanced rock weathering on croplands (ERW) is a NET with co-benefits for agriculture, soils and ocean acidification that creates opportunities for generating income unaffected by diminishing carbon taxes as emissions approach net-zero. Here we show that ERW deployment with croplands to deliver net 2 Gt CO2 yr−1 removal approximately doubles the probability of meeting the Paris 1.5 °C target at 2100 from 23% to 42% in a high mitigation Representative Concentration Pathway 2.6 baseline climate."

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12.08.2021

# New Publications

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Renforth, P.; Campbell, J. S. (2021): The role of soils in the regulation of ocean acidification

Renforth, P.; Campbell, J. S. (2021): The role of soils in the regulation of ocean acidification. In Philosophical transactions of the Royal Society of London. Series B, Biological sciences 376 (1834), p. 20200174. DOI: 10.1098/rstb.2020.0174.

"Increasing the alkalinity levels in the ocean through enhanced weathering could help to ameliorate the effects of ocean acidification in two ways. First, enhanced weathering would slightly elevate the pH of drainage waters, and the receiving coastal waters. The elevated pH would result in an increase in carbonate mineral saturation states, and a partial reversal in the effects of elevated CO2. Second, the increase in alkalinity would help to replenish the ocean's buffering capacity by maintaining the ‘Revelle Factor’, making the oceans more resilient to further CO2 emissions. However, there is limited research on the downstream and oceanic impacts of enhanced weathering on which to base deployment decisions."

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02.08.2021

# Media

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mdr: Stopping climate change? Researchers want to draw CO2 from the atmosphere using basalt rock dust (German)

German article on enhanced weathering.

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02.08.2021

# New Publications

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Goll, Daniel S.; et al. (2021): Potential CO2 removal from enhanced weathering by ecosystem responses to powdered rock

Goll, Daniel S.; Ciais, Philippe; Amann, Thorben; Buermann, Wolfgang; Chang, Jinfeng; Eker, Sibel et al. (2021): Potential CO2 removal from enhanced weathering by ecosystem responses to powdered rock. In Nat. Geosci., pp. 1–5. DOI: 10.1038/s41561-021-00798-x.

" Here we explore soil amendment with powdered basalt in natural ecosystems."

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28.07.2021

# New Publications

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Goll, Daniel S.; et al. (2021): Potential CO2 removal from enhanced weathering by ecosystem responses to powdered rock

Goll, Daniel S.; Ciais, Philippe; Amann, Thorben; Buermann, Wolfgang; Chang, Jinfeng; Eker, Sibel et al. (2021): Potential CO2 removal from enhanced weathering by ecosystem responses to powdered rock. In Nat. Geosci., pp. 1–5. DOI: 10.1038/s41561-021-00798-x.

"Here we explore soil amendment with powdered basalt in natural ecosystems."

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19.07.2021

# Calls & events

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Job: Postdoctoral Researcher Soil Geochemistry/Chemistry (University of California, Berkeley)

No Deadline

"The Pallud Lab is hiring a Postdoctoral Research Fellow to investigate a new verification scheme for enhanced rock weathering application in agricultural soils in soil column lab experiments."

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12.07.2021

# Calls & events

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PhD Opportunity: Doctoral scholarship holder Enhanced Weathering for Climate Change Mitigation

Deadline: 19. August 2021

"You will work actively on the preparation of a PhD thesis on the project ‘Experimental verification of the influence of biota on enhanced silicate weathering.’"

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07.07.2021

# New Publications

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Rinder, Thomas; Hagke, Christoph von (2021): The influence of particle size on the potential of enhanced basalt weathering for carbon dioxide removal - Insights from a regional assessment

Rinder, Thomas; Hagke, Christoph von (2021): The influence of particle size on the potential of enhanced basalt weathering for carbon dioxide removal - Insights from a regional assessment. In Journal of Cleaner Production 315, p. 128178. DOI: 10.1016/j.jclepro.2021.128178.

"It has been shown that enhanced weathering is principally feasible on a global scale, but there is still uncertainty with respect to the predicted drawdown in a given timeframe. This information is however vital to evaluate, if enhanced weathering should be further considered as a factor to alleviate the impact of the climate crisis. With this in mind, this article reviews of the current state of research and estimates the CO2 drawdown for scenarios using basalt powders of different particle size distribution (<100 μm, <10 μm and <1 μm)."

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07.07.2021

# New Publications

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Choi, Woo-Jung; et al. (2021): Environmental Risks in Atmospheric CO2 Removal Using Enhanced Rock Weathering Are Overlooked

Choi, Woo-Jung; Park, Hyun-Jin; Cai, Yanjiang; Chang, Scott X. (2021): Environmental Risks in Atmospheric CO2 Removal Using Enhanced Rock Weathering Are Overlooked. In Environmental science & technology. DOI: 10.1021/acs.est.1c02505.

"The risks and limitations of ERW should be clearly recognized and a strategy for the pragmatic use of ERW for CO2 removal needs to be developed for policy makers."

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