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  • 2020-2024  (8)
  • 2022  (8)
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  • 2020-2024  (8)
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  • 1
    Publication Date: 2024-01-05
    Description: In diesem Beitrag werden die verschiedenen Methoden der Kohlendioxid Entnahme (Carbon Dioxide Removal, CDR) beschrieben, deren technologische Bereitstellung überprüft und Potenzial, Kosten und Nebenwirkungen anhand der neuesten Literatur diskutiert. Die Methoden werden darin unterschieden, ob sie Kohlenstoff durch chemische oder biologische Prozesse aus der Atmosphäre entnehmen, und ob sie diesen dann an Land, im Ozean oder in Gesteinsformationen speichern. Summary In this chapter different Carbon Dioxide Removal (CDR) methods are described. Based on the most recent literature, their respective tech readiness, potential, cost and side effects are discussed. The methods are distinct by their carbon uptake methodology, either through chemical or biological processes, as well as by the choice of storage location, either on land, in the ocean or in geological storage facilities.
    Type: Article , NonPeerReviewed
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  • 2
    Publication Date: 2024-02-07
    Description: With increasing pressure for climate action, commitments to setting scientifically supported emissions targets have become more common among firms. The target-setting methods currently endorsed by the Science Based Targets Initiative (SBTi) use emission pathways that are aligned with 1.5°C and well-below 2°C long-term temperature goals to inform near-term corporate targets. However, most of these scenarios lead to a temperature overshoot, followed by a return to the temperature goal achieved via net-negative emissions in the second half of this century. When used to inform near-term (e.g., 2030) corporate targets, the result is a set of targets that are aligned with an overshoot of a temperature target, with no explicit long-term commitment to using negative emissions technologies to reverse this. To decrease the risk of this misalignment with the long-term temperature goal, we propose an alternative approach that derives corporate targets directly from the remaining global cumulative carbon budget. We illustrate this approach using global Scope 1 emissions disclosed by public firms in 2019 to estimate corporate carbon budgets and construct idealized emissions-reduction pathways that are consistent with the remaining global carbon budget for 1.5°C and well-below 2°C. While firms, or their sectors, may choose varying mitigation pathways aligned with either global temperature limit, consistency with remaining carbon budgets requires that any delayed mitigation action in the near term is followed by more rapid emissions reductions in subsequent years. This study emphasizes the need for a more precautionary and robust approach to corporate target setting.
    Type: Article , PeerReviewed
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  • 3
    Publication Date: 2024-02-07
    Description: The zero emissions commitment (ZEC) is the expected temperature change following the cessation of anthropogenic emissions of climate altering gases and aerosols. Recent model intercomparison work has suggested that global average ZEC for CO2 is close to zero. However there has thus far been no effort to explore how temperature is expected to change at spatial scales smaller than the global average. Here we analyze the output of nine full complexity Earth System Models which carried out standardized ZEC experiments to quantify the ZEC from CO2. The models suggest that substantial temperature change following cessation of emissions of CO2 can be expected at large and regional spatial scales. Large scale patterns of change closely follow long established patterns seen during modern climate change, with higher variability and more change as one approaches the polar regions, and with more change over land than ocean. The sign of temperature change (warming or cooling) varies by model and climatic zone. At the regional scale patterns of change are far more complex and show little consistency between different models. Analysis of model output suggest that for most models these changes far exceed pre-industrial internal variability, suggesting either higher climate variability, continuing changes to climate dynamics or both. Overall substantial regional changes in climate are expected following cessation of CO2 emissions but the pattern, magnitude and sign of these changes remains highly uncertain.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
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  • 4
    Publication Date: 2024-02-07
    Description: Germany 2050: For the first time Germany reached a balance between its sources of anthropogenic CO2 to the atmosphere and newly created anthropogenic sinks. This backcasting study presents a fictional future in which this goal was achieved by avoiding (∼645 Mt CO2), reducing (∼50 Mt CO2) and removing (∼60 Mt CO2) carbon emissions. This meant substantial transformation of the energy system, increasing energy efficiency, sector coupling, and electrification, energy storage solutions including synthetic energy carriers, sector-specific solutions for industry, transport, and agriculture, as well as natural-sink enhancement and technological carbon dioxide options. All of the above was necessary to achieve a net-zero CO2 system for Germany by 2050.
    Type: Article , PeerReviewed
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  • 5
    Publication Date: 2024-02-07
    Description: Removal of carbon dioxide from the atmosphere will be required over the next decades to achieve the Paris Agreement goal of limiting global warming to well below 2°C aiming at not exceeding 1.5°C. Technological and ecosystem-based options are considered for generating negative emissions through carbon dioxide removal (CDR) and several nations have already included these in their Long-Term Low Greenhouse Gas Emission Development Strategies. However, strategies for development, implementation, and upscaling of CDR options often remain vague. Considering the scale at which CDR deployment is envisioned in emission pathways for limiting global warming to 1.5°C, significant environmental, social, and institutional implications are to be expected and need to be included in national feasibility assessments of CDR options. Following a multi-disciplinary and comprehensive approach, we created a framework that considers the environmental, technological, economic, social, institutional, and systemic implications of upscaling CDR options. We propose the framework as a tool to help guide decision-relevant feasibility assessments of CDR options, as well as identify challenges and opportunities within the national context. As such, the framework can serve as a means to inform and support decision makers and stakeholders in the iterative science-policy process of determining the role of CDR options in national strategies of achieving net-zero carbon emissions.
    Type: Article , PeerReviewed
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  • 6
    Publication Date: 2023-06-29
    Description: Das Ergebnispapier ist das Resultat des IdeenLaufs im Wissenschaftsjahr 2022 – Nachgefragt!. Es ist das Ergebnis des Austauschs zwischen Wissenschaft und Gesellschaft sowie zwischen vielen verschiedenen wissenschaftlichen Disziplinen. Bürger*innen in ganz Deutschland waren beim IdeenLauf unter dem Motto #MeineFragefürdieWissenschaft eingeladen, Fragen für die Wissenschaft einzureichen. Über 14.000 Fragen haben die Menschen als Reaktion auf den Aufruf gestellt. Entstanden ist daraus dieses Ergebnispapier. In die 59 Cluster und 9 ZukunftsRäume sind eine Vielzahl von Fragen, individuellen Interessen und Lebensrealitäten von vielen Menschen eingeflossen. Das Papier soll als Ideenpool und Anregung für zukünftige Forschungsvorhaben und Forschungspolitik dienen
    Type: Report , NonPeerReviewed
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  • 7
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    Deutscher Wetterdienst (DWD)
    Publication Date: 2023-01-13
    Type: Article , NonPeerReviewed
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  • 8
    Publication Date: 2024-06-07
    Description: In its latest assessment report the IPCC stresses the need for carbon dioxide removal (CDR) to counterbalance residual emissions to achieve net zero carbon dioxide or greenhouse gas emissions. There are currently a wide variety of CDR measures available. Their potential and feasibility, however, depends on context specific conditions, as among others biophysical site characteristics, or availability of infrastructure and resources. In our study, we selected 13 CDR concepts which we present in the form of exemplary CDR units described in dedicated fact sheets. They cover technical CO2 removal (two concepts of direct air carbon capture), hybrid solutions (six bioenergy with carbon capture technologies) and five options for natural sink enhancement. Our estimates for their CO2 removal potentials in 2050 range from 0.06 to 30 million tons of CO2, depending on the option. Ten of the 13 CDR concepts provide technical removal potentials higher than 1 million tons of CO2 per year. To better understand the potential contribution of analyzed CDR options to reaching net-zero CO2 emissions, we compare our results with the current CO2 emissions and potential residual CO2 emissions in 2050 in Germany. To complement the necessary information on technology-based and hybrid options, we also provide an overview on possible solutions for CO2 storage for Germany. Taking biophysical conditions and infrastructure into account, northern Germany seems a preferable area for deployment of many concepts. However, for their successful implementation further socio-economic analysis, clear regulations, and policy incentives are necessary.
    Type: Article , PeerReviewed
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    Format: other
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