Kategorie: Science-Policy Documents

Peer-reviewed Publications

Noh et al. (2025): Revisiting the Additionality and Durability of Carbon Uptake in Large-Scale Ocean Iron Fertilization

Kyung-Min Noh, Xiao Liu, Charles Stock, Dennis McGillicuddy Jr. et al., IN: Research Square, https://doi.org/10.21203/rs.3.rs-7717531/v1

Climate stabilization pathways limiting global warming to 1.5–2 °C targets require emission reductions with additional carbon dioxide removal (CDR) of ~2–3 Pg C year⁻¹. Here, the authors assess the long-term additionality and durability of carbon uptake from large-scale ocean iron fertilization (OIF) using an Earth System Model under emissions-driven scenarios.

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Science-Policy Documents

Galanti et al. (2025): Purity-Constrained TVSA Modeling of Lewatit VPOC 1065 for Direct Air Capture: Bridging Cured Thermodynamics, Process Design and Geometrical Analysis

Mattia Galanti, Kiia Kaaresvirta, Ivo Roghair and Martin van Sint Annaland, IN: ChemRxiv Preprint, https://doi.org/10.26434/chemrxiv-2025-8ms1s

This work develops a comprehensive temperature–vacuum swing adsorption modeling framework that unifies detailed adsorption thermodynamics for both dry and humid conditions, refined heat-transfer descriptions accounting for wall-driven regeneration, realistic treatment of auxiliary equipment, and explicit oxygen-purity constraints.

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Science-Policy Documents

Du et al. (2025): Multiphase carbonation engineering of RCA via CO₂-enriched cement slurry treatment: Mechanistic insights into carbonation efficiency and asphalt pavement performance enhancement

Xiaotong Du, Kui Hu, Jiahao Zhang, Jia Li, Giuseppe Carlo Marano and Tingyi Zhang, IN: Construction and Building Materials, https://doi.org/10.1016/j.conbuildmat.2025.143722

The growing demand for sustainable pavement materials necessitates innovative approaches to enhance recycled concrete aggregates (RCA), whose surface defects critically undermine asphalt bonding performance. Given its high porosity and loosely bound structure, calcium silicate hydrate (C-S-H) is identified as the primary factor undermining RCA performance and thus the key target of modification. This study proposes a CO₂-enriched cement slurry treatment under ambient conditions to engineer the RCA microstructure through controlled carbonation of C-S-H. The treatment integrates three mechanistic pathways: hydration-induced hardening of unhydrated cement phases, carbonation curing of setting slurry, and targeted carbonation of residual microstructural pores on the RCA surface.

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Science-Policy Documents

Marx et al. (2025): Development of the ecological activity index as an integrative ecosystem assessment and monitoring asset for ocean alkalinity enhancement

Lukas Marx, Jennie Rheuban, Daniel McCorkle, Christopher Murray, and 6 more, IN: ResearchSquare, https://doi.org/10.21203/rs.3.rs-6371725/v1

Ocean alkalinity enhancement (OAE) is an mCDR approach that sequesters carbon dioxide by adding alkaline materials into the marine environment. Currently, no environmental impact assessment framework exists for OAE. Here, the authors describe an assessment approach using public datasets of multiple trophic levels and fishing activity. They develop the ecological activity index (EAI), a quantitative tool to identify locations and times of year that minimize impacts on critical ecosystem metrics.

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Science-Policy Documents

Burke & Schenuit (2024): Conditional fungibility: sequencing permanent removals into emissions trading systems

Josh Burke, Felix Schenuit IN: Environmental Research Letters, DOI 10.1088/1748-9326/ad796b

First, the authors present the policy context and a mapping and conceptual distinction of five groups of measures applicable to address varying levels of permanence in CDR policy. Second, they make the case for limiting the fungibility of different CDR methods with each other and with fossil CO2 emissions. Third, and building on the identified measures and conditional fungibility, the authors present a sequencing strategy for integrating permanent removals into existing compliance carbon markets.

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Science-Policy Documents

Johnson et al: (2024): Can coastal and marine carbon dioxide removal help to close the emissions gap? Scientific, legal, economic, and governance considerations 

Martin Johnson, Erik van Doorn, Nathalie Hilmi, Christa Marandino, Natasha McDonald, Helmuth Thomas, Denis Allemand, L. Delvasto Algarin, Lara Lebleu, David T. Ho, Mary Oloyede, Alain Safa, Peter Swarzenski IN: Elementa: Science of the Anthropocene, https://doi.org/10.1525/elementa.2023.00071

In this Policy Bridge, the authors present the key issues regarding the safety, efficacy, funding, and governance of coastal and marine systems in support of climate change mitigation. Novel insights into the likely potential of these systems for use in mitigating excess carbon dioxide emissions are presented. There may be potential for coastal blue carbon and marine carbon dioxide removal (mCDR) actions to impact climate change mitigation significantly over the rest of the 21st century, particularly post 2050. However, governance frameworks are needed urgently to ensure that the potential contribution from coastal and ocean systems to climate change mitigation can be evaluated properly and implemented safely. Ongoing research and monitoring efforts are essential to ensure that unforeseen side effects are identified and corrective action is taken. The co-creation of governance frameworks between academia, the private sector, and policymakers will be fundamental to the safe implementation of mCDR in the future.

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Science-Policy Documents

Salman et al. (2024): G20 roadmap for carbon neutrality: The role of Paris agreement, artificial intelligence, and energy transition in changing geopolitical landscape

Muhammad Salman, Guimei Wang, Lin Qin, Xing He IN: Journal of Environmental Management, 367, 122080, https://doi.org/10.1016/j.jenvman.2024.122080

Here, the authors look at the linear effects of AI and the Paris Agreement (AI), as well as their potential interaction on carbon neutrality. They also investigate whether geopolitical risk (GPR) can hinder or enhance efforts to attain carbon neutrality through energy transition (ET). To measure carbon neutrality of G20 countries, the authors employed a robust parametric Malmquist index combined with the fixed-effect panel stochastic frontier model to account for heterogeneity.

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Science-Policy Documents

Policy Brief: Eckpunktepapier für ein integriertes Carbon Management

Aysel Aliyeva, Lukas Daubner, Ralf Fücks und Julia Hönnecke, Zentrum Liberale Moderne, Mai 2024

Carbon Management ist eine notwendige Säule des Klimaschutzes. Ein integriertes Carbon Management muss dabei komplexe klima-, industrie- und umweltpolitische Fragen zusammendenken. Das Eckpunktepapier erklärt Methoden, diskutiert Lösungen, aber auch Herausforderungen und zeigt konkrete Handlungsempfehlungen auf, wie ein integriertes Carbon Management rasch etabliert werden kann.

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Science-Policy Documents

Policy Brief: Build Carbon Removal Reserve to Secure Future of EU Emissions Trading

by Wilfried Rickels, Mathias Fridahl, Roland Rothenstein, Felix Schenuit, Kiel Institute for the World Economy, May 2024

Transforming an existing ETS that covers gross emissions into a net-emissions system that covers both emissions and removals and introducing a net-zero cap followed by a net-negative cap, poses the challenges of ensuring that the market remains operational and that the policy objectives underlying the ETS are maintained during the transition period. The EU faces this dual challenge. Delpla and Gollier (2019), Rickels, Proelß, et al. (2021), Rickels, Rothenstein, et al. (2022), and Edenhofer et al. (2024) propose introducing a Carbon Central Bank (CCB) to manage the inclusion of CRC trading and the transformation of the existing EU ETS into a net-zero and then net-negative ETS.

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Science-Policy Documents

Report: Charting a Course for Marine Carbon Dioxide Removal (mCDR): Policy Sequencing in mCDR Development

by Jasmine Yu, Savita Bowman, clearpath, March 2024

This report (1) identifies policies to support each innovation stage of mCDR technologies: early-stage R&D, widescale deployment and commercialization, (2) highlights the growing U.S. federal engagement and resources for mCDR and (3) describes policies that could create the conditions for successful wide-scale mCDR deployment,
dependent on the findings from R&D field trials.

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