Schlagwort: ocean-based CDR

Nature-Gruber et al. (2023): Trends and variability in the ocean carbon sink

Nicolas Gruber, Dorothee C. E. Bakker, Tim DeVries, Luke Gregor, Judith Hauck, Peter Landschützer, Galen A. McKinley, Jens Daniel Müller IN: Nat Rev Earth Environ (2023). https://doi.org/10.1038/s43017-022-00381-x

In this Review, the authors discuss trends and variations in the ocean carbon sink. The sink stagnated during the 1990s with rates hovering around –2 Pg C year–1, but strengthened again after approximately 2000, taking up around –3 Pg C year–1 for 2010–2019. The most conspicuous changes in uptake occurred in the high latitudes, especially the Southern Ocean.

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Webinar on ocean-based CDR with CDRmare

Tuesday, February 7, 2023, 4 p.m. to 5 p.m.; hosted by Swiss Carbon Removal Platform

In this CDR Swiss webinar, Prof. Dr. Gregor Rehder and Prof. Dr. Achim Kopf from the German research mission „CDRmare“ will present marine Carbon Dioxide Removal (CDR) methods, including carbon storage in the oceanic crust (basalt formations) and in geological formations of the German North Sea (sand stone formations).

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A Solution to Excess CO2? New Study Proposes Fertilizing the Ocean

by Beth Mundy on scitechdaily.com, January 20, 2023

„An international team of researchers led by Michael Hochella of the Pacific Northwest National Laboratory suggests that utilizing tiny organisms could be a solution to addressing the pressing need to remove excess carbon dioxide from the Earth’s environment. The team conducted an analysis, published in the journal Nature Nanotechnology, on the possibility of seeding the oceans with iron-rich engineered fertilizer particles near ocean plankton, crucial microscopic plants in the ocean ecosystem, to boost the growth and carbon dioxide uptake of phytoplankton.“

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Ocean Visions Biennial Summit 2023 – Registration open

4th-6th of April 2023 at the Georgia Aquarium in Atlanta, Georgia & online

The conference is designed to be highly interactive with a mix of session types such as plenaries, lightning presentations, posters, an innovation showcase, and other networking interactions. The conference is structured around five core topical tracks, which will be addressed through concentrated, half-day sessions, in addition to other schedule session times.

  • Ocean-Based Contributions to Global Decarbonization
  • Ocean-Based Contributions to Carbon Dioxide Removal
  • Ocean Ecosystem Repair and Regeneration
  • Human Adaptation to a Changing Ocean
  • Building a Global Community of Solvers at the Ocean-Climate Nexus

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Zhuang et al. (2023): Potential capture and conversion of CO2 from oceanwater through mineral carbonation

Wen Zhuang, Xiaocheng Song, Min Liu, Qian Wang, Jinming Song, Liqin Duan, Xuegang Li, Huamao Yuan IN: Science of The Total Environment 867, 161589, https://doi.org/10.1016/j.scitotenv.2023.161589

This review explores two main mechanisms (i.e., enhanced weathering and ocean alkalinization) and materials (e.g., silicate rocks, metal oxides, and metal hydroxides) that regulate marine chemical carbon sink (MCCS). This work also compares MCCS with other terrestrial and marine carbon sinks and discusses the implementation of MCCS, including the following aspects: chemical reaction rate, cost, and possible ecological and environmental impacts.

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Berger et al. (2023): Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal

Manon Berger, Lester Kwiatkowski, David T. Ho, Laurent Bopp IN: Environmental Research Letters, DOI 10.1088/1748-9326/acb06e

The authors modify a high-resolution ocean biogeochemical model to simulate the consumption of dissolved inorganic carbon (DIC) and macronutrients by idealised macroalgal cultivation in Exclusive Economic Zones (EEZs). Under imposed macroalgal production of 0.5 PgC yr-1 with no nutrient feedbacks, physicochemical processes are found to limit the enhancement in the ocean carbon sink to 0.39 PgC yr-1 (1.43 GtCO2 yr-1), corresponding to CDR efficiency of 79%. Only 0.22 PgC yr-1 (56%) of this air-sea carbon flux occurs in the regions of macroalgae cultivation, posing potential issues for measurement, reporting and verification (MRV).

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Zhang et al. (2022): Eco-engineering approaches for ocean negative carbon emission

Chuanlun Zhang, Tuo Shi, Jihua Liu, Zhili He, Helmuth Thomas, Hailiang Dong, Buki Rinkevich, Yuze Wang, Jung-Ho Hyun, Markus Weinbauer, Celeste López-Abbate, Qichao Tu, Shucheng Xie, Youhei Yamashita, Pavel Tishchenko, Quanrui Chen, Rui Zhang, Nianzhi Jiao IN: Science Bulletin 67 (24), pp. 2564-2573, https://doi.org/10.1016/j.scib.2022.11.016

The authors advocate eco-engineering approaches for ocean negative carbon emission (ONCE), aiming to enhance carbon sinks in the marine environment. An international program is being established to promote coordinated efforts in developing ONCE-relevant strategies and methodologies, taking into consideration ecological/biogeochemical processes and mechanisms related to different forms of carbon (inorganic/organic, biotic/abiotic, particulate/dissolved) for sequestration.

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Rose & Hemery (2023): Methods for Measuring Carbon Dioxide Uptake and Permanence: Review and Implications for Macroalgae Aquaculture

Deborah J. Rose , Lenaïg G. Hemery IN: J. Mar. Sci. Eng. 11(1), 175; https://doi.org/10.3390/jmse11010175

This article reviews current methods for monitoring carbon to assess the potential for application in the context of macroalgae aquaculture as a CDR strategy. In total, 382 papers were included in the review and categorized by carbon uptake methods, carbon permanence methods, and comprehensive frameworks for assessing carbon capture.

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Plan Sea: Ocean Interventions to Address Climate Change

by Wil Burns & Anna Medlener

The Institute for Carbon Removal Law & Policy, American University, has launched a new podcast series focused on ocean-based carbon dioxide removal: Plan Sea: Ocean-Based Interventions to Combat Climate Change. Two episodes: „The Seascape Initiative“ and „Recommendations for permitting seaweed cultivation in California with Romany Webb“ are available.

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