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CLAIM Hosts International Workshop on Climate Metrics and Impact Assessment of Aviation

The CLAIM consortium is pleased to announce the successful completion of its International Workshop on Climate Metrics and Impact Assessment of Aviation, which took place on June 17-18, 2024, and was hosted by DLR institute of Systems Architectures in Aeronautics.

The goal of the workshop was to bring together international experts in aviation climate impact assessment from academia, research and industry to discuss on tangible and suitable climate metrics, the potential new technologies that could impact climate metrics and the challenges of impact assessment.

claim International Workshop on Climate Metrics and Impact Assessment of Aviation

The two-day hybrid workshop started with an overview of the goals and challenges of collaborative aviation climate projects such as CLAIM by the Project Coordinator, Prajwal Shiva Prakasha. Clean Aviations Head of Technology Office, Jean-Francois Brouckaert, and Project Officer Sonell Shroff set out the goals and expectations for a common understanding of climate metrics and risks not only for the EU, but at a global level. Michael Kyriakopoulos on behalf of the European Commission DG-RTD highlighted the need for synergy between different initiatives for non-CO2 consideration at EU-level. The European Commission is funding collaborative projects by CINEA and other initiatives worth tens of millions of euros to research aviation’s climate impact. Steven Arrowsmith from EASA (European Union Aviation Sagety Agency) reported on the non-CO2 project initiated recently and welcomed the upcoming cooperation with the CLAIM consortium.

Starting the workshop, workshop leads Volker Grewe, Sigrun Matthes and Katrin Dahlmann from DLR Institute of Atmospheric Physics provided the first brief on the candidate metrics and informed about the state of the art.

Liam Megill from DLR Institute of Atmospheric Physics presented the key requirements for tangible aviation climate metrics and emphasized the need for scoping and caution before finalizing a single metric for assessing climate impact by CO2 and non-CO2 emissions. There is no silver bullet. Details can be found in this article.

Nicolas Bellouin from IPSL-Institut Pierre-Simon Laplace presented on near-term climate impact mitigation through contrail avoidance. The study by Audran Borella et al. illustrates the dependence of non-CO2 effects on flight route and weather, whereas the choice of climate metric did not change the overall conclusions. A highlight was the trade-off between purely fuel burn optimized flight routes focused on CO2 emissions and climate optimized flight routes considering also non-CO2 emissions.

Feija Yin from Delft University of Technology and Malte Niklaß from DLR Institute of Air Transport presented on climate metrics in technology assessment in two case studies, one on sustainable aviation fuels and the other on future aircraft technologies. Both studies show that a system-wide approach is necessary to consider all effects and that the appropriate time horizon of climate metrics depends on the application case.

The second day of the workshop started with the invited talk by Sébastien Dubois, Clean Aviations Head of Unit, on the need for climate assessment for Clean Aviation, followed by a first interactive session in which four working groups discussed and prioritized the requirements for climate metrics. It was found that neutrality was weighted as the most important criterion to avoid any bias from the metric itself.

Further, lively discussion continued with experts in three parallel and alternating streams:

  1. Evaluation of Climate Metrics moderated by Kathrin Dahlmann and Liam Megill

  2. Gap Analysis of Climate Metrics moderated by Helen Szöke-Erös and Patrick Ratei

  3. Climate Metrics and Technology Impact moderated by Lukas Söffing and Malte Niklaß

The CLAIM consortium and Clean Aviation JU would like to thank the workshop organizers Volker Grewe, Helen Szöke-Erös, and Patrick Ratei for making the workshop a success and a great starting point for discussion among the climate and aviation experts. Later this year, the CLAIM consortium will publish white paper on the detailed outcomes and recommendations.

For more details and updates on results from the CLAIM project, stay engaged with our website and follow us on LinkedIn.

Read the respective Press Release:

CLAIM - Climate Metrics Workshop - Press release
Download PDF • 809KB

Workshop participants:

Our team:

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