15.09.2021

# Media

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Anthropocene: Tiny chemical “nanojars” could remove carbon dioxide from lakes and oceans

"In what could be an important tool to clean up our lakes and oceans, researchers have made ‘nanojars’ that can capture carbon dioxide and toxins from water."

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20.08.2021

# New Publications

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Burt, Daniel J.; et al. (2021): The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement

Burt, Daniel J.; Fröb, Friederike; Ilyina, Tatiana (2021): The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement. In Front. Clim. 3, p. 21. DOI: 10.3389/fclim.2021.624075.

"Ocean Alkalinity Enhancement (OAE) simultaneously mitigates atmospheric concentrations of CO2 and ocean acidification; however, no previous studies have investigated the response of the non-linear marine carbonate system sensitivity to alkalinity enhancement on regional scales. We hypothesise that regional implementations of OAE can sequester more atmospheric CO2 than a global implementation."

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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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Grist: Science has a prescription for the ocean’s heartburn. Some side effects are worth it

"A project to de-acidify bay waters saved baby oysters in Oregon — and has the potential to save the oceans. We just need to get more comfortable with geoeingeering to do it."

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10.06.2021

# New Publications

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Mongin, Mathieu; et al. (2021): Reversing ocean acidification along the Great Barrier Reef using alkalinity injection

Mongin, Mathieu; Baird, Mark E.; Lenton, Andrew; Neill, Craig; Akl, John (2021): Reversing ocean acidification along the Great Barrier Reef using alkalinity injection. In Environ. Res. Lett. 16 (6), p. 64068. DOI: 10.1088/1748-9326/ac002d.

"In this study, we use a coupled hydrodynamic-biogeochemical model of the GBR and surrounding ocean to simulate artificial ocean alkalinisation (AOA) as a means to reverse the impact of global ocean acidification on GBR reefs."

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06.05.2021

# New Publications

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Tyka, Michael; et al. (2021): CO2 capture by pumping surface acidity to the deep ocean

Tyka, Michael; Platt, John; van Arsdale, Christopher (2021): CO2 capture by pumping surface acidity to the deep ocean. Preprint. DOI: 10.31223/X5TK60.

"Here we present a method which relies purely on the redistribution and dilution of acidity from a thin layer of the surface ocean to a thicker layer of deep ocean, with the aim of reducing surface acidification and accelerating the former carbonate homeostasis."

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03.05.2021

# Media

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Ocean Visions: Ocean Visions’ Experts to Advise/Evaluate Innovation Tackling Ocean Acidification

"Pilot project will develop new electrochemical approach to mitigate ocean acidification and enhance ocean-based carbon sequestration."

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03.05.2021

# New Publications

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Terhaar, Jens, et al. (2021): Southern Ocean anthropogenic carbon sink constrained by sea surface salinity

Terhaar, Jens; Frölicher, Thomas L.; Joos, Fortunat (2021): Southern Ocean anthropogenic carbon sink constrained by sea surface salinity. In Science Advances 7 (18). DOI: 10.1126/sciadv.abd5964.

"We identify a tight relationship across two multimodel ensembles between present-day sea surface salinity in the subtropical-polar frontal zone and the anthropogenic carbon sink in the Southern Ocean."

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03.05.2021

# Media

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EurekAlert!: Uncertainty of future Southern Ocean CO2 uptake cut in half

"Together with Thomas Frölicher and Fortunat Joos, who are also researchers at the Oeschger Centre, Terhaar has just presented in the scientific journal "Sciences Advances" a new method for constraining the Southern Ocean's CO2 sink."

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03.05.2021

# New Publications

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Condie, Scott A.; et al. (2021): Large-scale interventions may delay decline of the Great Barrier Reef

Condie, Scott A.; Anthony, Kenneth R. N.; Babcock, Russ C.; Baird, Mark E.; Beeden, Roger; Fletcher, Cameron S. et al. (2021): Large-scale interventions may delay decline of the Great Barrier Reef. In R. Soc. open sci. 8 (4). DOI: 10.1098/rsos.201296.

"Evaluating the efficacy of alternative interventions in a complex system experiencing major cumulative impacts can only be achieved through a systems modelling approach. We have evaluated combinations of interventions using a coral reef meta-community model."

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