Tag: ocean-based CDR

Peer-reviewed Publications

Verma & Gautam (2025): Mitigating atmospheric carbon dioxide through ocean-based carbon capture technologies: a delay mathematical model

Maitri Verma and Cherie Gautam, IN: The European Physical Journal Plus, https://doi.org/10.1140/epjp/s13360-025-06881-1

In this study, the authors develop a nonlinear mathematical model to examine how budget allocation for ocean-based carbon removal technologies and shellfish farming, along with delays between investment and impact, influences atmospheric CO₂ dynamics. The model considers that a portion of total budget is allocated for the implementation of ocean-based carbon removal technologies, while the remainder is invested in shellfish farming. The formulated model is qualitatively analyzed to determine the system’s behavior in the long run.

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Peer-reviewed Publications

Delval et al. (2025): Life cycle assessment of ocean-based carbon dioxide removal approaches: A systematic literature review

Mona H. Delval, Nils Thonemann, Patrik J.G. Henriksson, Samantha E. Tanzer, Paul Behrens, IN: Renewable and Sustainable Energy Reviews, https://doi.org/10.1016/j.rser.2025.116091

As climate impacts worsen, novel technologies to draw down atmospheric carbon are gaining attention. One such approach is ocean-based carbon dioxide removal (OCDR). However, the potential environmental side-effects of large-scale OCDR deployment remain understudied. Here, the authors present a systematic literature review of the life cycle assessments (LCAs) of OCDR approaches.

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Peer-reviewed Publications

Delval et al. (2025): Life cycle assessment of ocean-based carbon dioxide removal approaches: A systematic literature review

Mona H. Delval, Nils Thonemann, Patrik J.G. Henriksson, Samantha E. Tanzer and Paul Behrens, IN: Renewable and Sustainable Energy Reviews, https://doi.org/10.1016/j.rser.2025.116091

As climate impacts worsen, novel technologies to draw down atmospheric carbon are gaining attention. One such approach is ocean-based carbon dioxide removal (OCDR). However, the potential environmental side-effects of large-scale OCDR deployment remain understudied. Here, the authors present a systematic literature review of the life cycle assessments (LCAs) of OCDR approaches.

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Reports

Report: Report on a sustainable development goals framework for ocean-based NET evaluation

David P. Keller and Wilfried Rickels, GEOMAR, January 2024

This report describes a CDR SDG assessment framework that was developed for future use in evaluating the sustainability of different ocean-based CDR options or portfolios. The assessment methodology describes how the user should first collect relevant information about the CDR approach(es) and then match it to the corresponding SDG indicators or sub-indicators. After that the user must transform (normalize) the derived indicator data for comparability. Then, the user must follow several steps of weighting, aggregation, and evaluation that follow an SDG structured nesting approach. In the end the methodology allows the user to quantify CDR impacts on progress towards attaining overall “sustainability”. No application of the framework was done as part of this task, but should be done in future research endeavors.

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Events

Webinar: MRV for Ocean-Based CDR: Spotlight on CDR Suppliers

Thursday, November 30, 7 – 8pm CET

Join Ocean Visions for the second webinar in their series on current innovations in measurement, reporting, and verification (MRV) for ocean-based carbon dioxide removal (CDR). They will spotlight leading startups doing electrochemical CDR to get a deeper understanding of the current state of MRV science, how it’s being applied, and the challenges and solutions advancing this important field. Talks by CDR scientists Erika La Plante, PhD (Equatic) and Sophie Chu, PhD (Captura) will be followed by a moderated audience Q&A.

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German News

Klimaretter Ozean? Wie das Meer (noch) mehr Kohlendioxid aufnehmen soll

Heute ist der achte World Ocean Review (WOR Nr. 8) „Klimaretter Ozean? Wie das Meer (noch) mehr Kohlendioxid aufnehmen soll“ erschienen! Der WOR erläutert die Rolle des Ozeans im Kohlenstoffkreislauf der Erde und stellt Vorteile, Risiken und Wissenslücken zu den wichtigsten meeresbasierten Verfahren zur Kohlendioxid-Entnahme (mCDR) vor.

Dieser WOR sowie andere vorherige Ausgaben können kostenlos bestellt und heruntergeladen werden. Er erscheint alle zwei Jahre in deutscher und englischer Sprache und wird weltweit von Interessierten aus Politik, Wirtschaft und Zivilgesellschaft gelesen. Er liefert aktuelles Hintergrundwissen zu relevanten Meeresthemen und richtet sich an alle, die in Sachen Meeresschutz und -nutzung mitreden wollen. Herausgeber ist die maribus gGmbH.

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Science-Policy Documents

Policy Brief: Blue Carbon: Challenges and opportunities to mitigate the climate and biodiversity crises

European Marine Board, marineboard.eu, November 2023

Blue Carbon ecosystems are a Nature-based Solution that can help mitigate the climate and biodiversity crises, while stabilising livelihoods, protecting coasts, and supporting other societal needs such as food security from the Ocean. EMB Policy Brief No. 11 describes different types and benefits of Blue Carbon ecosystems, and discusses uncertainties and challenges for the conservation and restoration of Blue Carbon ecosystems as a climate change solution. The document also highlights the wider role of the Ocean in mitigating climate change through the carbon cycle, and closes with key research and management recommendations.

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Events

Science Communication Training on Ocean Carbon Dioxide Removal

Session 1: February 1-2, 2024, 1-4 pm ET; Session 2: February 18, 9 am-5 pm CT

Session 1: Virtual; Session 2: New Orleans, LA (in conjunction with the 2024 Ocean Sciences Meeting)

COMPASS announced a two-part workshop series in conjunction with the 2024 Ocean Sciences Meeting, held in New Orleans in February 2024. Designed for physical and social scientists and technical experts working in the ocean carbon dioxide removal (oCDR) space, these workshops will help participants share their work and insights on ocean carbon dioxide removal in clear, relevant terms. Grounded in the latest research on science communication, COMPASS workshops are designed to help participants find the relevance of their science for the audiences they most want to reach—journalists, policymakers, the public, and even other scientists. In this two-part workshop series, participants will have the opportunity to engage with top-notch science journalists who will share insights on how scientists can become excellent communicators and provide 1:1 feedback on participants’ communication messages.

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Peer-reviewed Publications

Kwiatkowski et al. (2023): Contrasting carbon dioxide removal potential and nutrient feedbacks of simulated ocean alkalinity enhancement and macroalgae afforestation

Lester Kwiatkowski, Manon Berger, Laurent Bopp, Stephane. Doleac, David T. Ho IN: Environmental Research Letters, DOI10.1088/1748-9326/ad08f9

Ocean alkalinity enhancement (OAE) and macroalgae afforestation have received considerable attention within the portfolio of potential CDR options, but their efficacy and constraints remain uncertain. Here the authors compare the CDR potential and biogeochemical impacts of OAE and macroalgae afforestation in exclusive economic zones (EEZs) using a global high-resolution ocean biogeochemical model.

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