ANES 2021 Aviation Emissions Voigt Slides Revised Redacted Version

Reducing emissions, contrails and climate impact from aviation – Highlights from recent aircraft campaigns Global Effective Radiative Forcing from Aviation DLR.de • Chart 2 CO2 34.3 mW m-2 Contrail cirrus 57.4 mW m-2 NOx 17.5 mW m-2 Lee et al., Atmos. Env., 2021 Christiane.Voigt@dlr.de Reducing the climate impact from aviation → Aviation climate impact mitigation by alternative fuels – the fast chain → Lean combustion → Reduced emissions during COVID lockdown 2020, Contrail avoidance DLR.de • Chart 3 Christiane.Voigt@dlr.de ECLIF2/NDMAX 2018 Lead: Bruce Anderson, NASA P. LeClercq, H. Schlager, C. Voigt DLR DLR.de • Folie 5 Reduced soot emissions by biofuel blends 50% HEFA Biofuel JET A1 Moore et al., Nature, 2017 Christiane.Voigt@dlr.de Climate impact and way forward DLR.de • Chart 6 Burkhardt et al., 2018 Previous campaigns → no 100% alternative fuel → No aromatic composition < 8.5% → No large engines → Novel observations needed Reduction in contrail cirrus RF by 80% reduction in EIice Efficient mitigation by alternative fuels →80% reduction in ice particle concentrations leads to 50 % reduction in radiative forcing →more pronounced in air traffic corridors →Fast implementation in fueling system possible Christiane.Voigt@dlr.de Lean Combustion DLR.de • Chart 7 What about soot and contrails at cruise? → Soot and contrail characteristics to be confirmed → Novel observations needed → Reduced NOx and soot emissions of staged lean combustors during LTO cycle → Flight tests show 35% reduction in EI NOx of new GEnx-2B PIP at cruise altitudes wrt CF6-50E. E I( N x )…

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Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]