Articles | Volume 24, issue 16
https://doi.org/10.5194/acp-24-9401-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-9401-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
The importance of an informed choice of CO2-equivalence metrics for contrail avoidance
Institut Pierre-Simon Laplace, Sorbonne Université/CNRS, Paris, France
Olivier Boucher
Institut Pierre-Simon Laplace, Sorbonne Université/CNRS, Paris, France
Keith P. Shine
Department of Meteorology, University of Reading, Reading, UK
Marc Stettler
Centre for Transport Studies, Department of Civil and Environmental Engineering, Imperial College London, London, UK
Katsumasa Tanaka
Laboratoire des Sciences du Climat et de l'Environnement (LSCE), IPSL, CEA/CNRS/UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
Earth System Division, National Institute for Environmental Studies (NIES), Tsukuba, Japan
Roger Teoh
Centre for Transport Studies, Department of Civil and Environmental Engineering, Imperial College London, London, UK
Nicolas Bellouin
Institut Pierre-Simon Laplace, Sorbonne Université/CNRS, Paris, France
Department of Meteorology, University of Reading, Reading, UK
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Cited
12 citations as recorded by crossref.
- Forecasting contrail climate forcing for flight planning and air traffic management applications: the CocipGrid model in pycontrails 0.51.0 Z. Engberg et al. https://doi.org/10.5194/gmd-18-253-2025
- The social costs of aviation CO2 and contrail cirrus D. Johansson et al. https://doi.org/10.1038/s41467-025-64355-5
- Pathways for including non-carbon dioxide aviation climate effects in the European Emission Trading System V. Grewe et al. https://doi.org/10.1038/s43247-026-03265-w
- Benchmarking and improving algorithms for attributing satellite-observed contrails to flights A. Sarna et al. https://doi.org/10.5194/amt-18-3495-2025
- Most long-lived contrails form within cirrus clouds with uncertain climate impact A. Petzold et al. https://doi.org/10.1038/s41467-025-65532-2
- Experiment on the jet/trailing vortex interaction during the wake roll-up phase L. Claus et al. https://doi.org/10.1103/7qyr-zf7w
- Bio jet fuel potentials in Europe from perennial grasses from abandoned cropland C. Iordan & M. Morales https://doi.org/10.1016/j.biombioe.2026.109073
- Airline sustainability reporting in Europe: Progress, compliance and challenges L. Martín-Domingo et al. https://doi.org/10.1016/j.indic.2025.101008
- Trade-offs in aviation impacts on climate favour non-CO2 mitigation M. Prather et al. https://doi.org/10.1038/s41586-025-09198-2
- Impact of forecast stability on navigational contrail avoidance T. Dean et al. https://doi.org/10.1088/2634-4505/ae1da5
- GVCCS: a dataset for contrail identification and tracking on visible whole sky camera sequences G. Jarry et al. https://doi.org/10.5194/essd-18-1037-2026
- Integrating realistic 3D aircraft trajectory optimization with climate impact metrics for sustainable aviation R. Chevallier et al. https://doi.org/10.1016/j.trip.2026.101983
12 citations as recorded by crossref.
- Forecasting contrail climate forcing for flight planning and air traffic management applications: the CocipGrid model in pycontrails 0.51.0 Z. Engberg et al. https://doi.org/10.5194/gmd-18-253-2025
- The social costs of aviation CO2 and contrail cirrus D. Johansson et al. https://doi.org/10.1038/s41467-025-64355-5
- Pathways for including non-carbon dioxide aviation climate effects in the European Emission Trading System V. Grewe et al. https://doi.org/10.1038/s43247-026-03265-w
- Benchmarking and improving algorithms for attributing satellite-observed contrails to flights A. Sarna et al. https://doi.org/10.5194/amt-18-3495-2025
- Most long-lived contrails form within cirrus clouds with uncertain climate impact A. Petzold et al. https://doi.org/10.1038/s41467-025-65532-2
- Experiment on the jet/trailing vortex interaction during the wake roll-up phase L. Claus et al. https://doi.org/10.1103/7qyr-zf7w
- Bio jet fuel potentials in Europe from perennial grasses from abandoned cropland C. Iordan & M. Morales https://doi.org/10.1016/j.biombioe.2026.109073
- Airline sustainability reporting in Europe: Progress, compliance and challenges L. Martín-Domingo et al. https://doi.org/10.1016/j.indic.2025.101008
- Trade-offs in aviation impacts on climate favour non-CO2 mitigation M. Prather et al. https://doi.org/10.1038/s41586-025-09198-2
- Impact of forecast stability on navigational contrail avoidance T. Dean et al. https://doi.org/10.1088/2634-4505/ae1da5
- GVCCS: a dataset for contrail identification and tracking on visible whole sky camera sequences G. Jarry et al. https://doi.org/10.5194/essd-18-1037-2026
- Integrating realistic 3D aircraft trajectory optimization with climate impact metrics for sustainable aviation R. Chevallier et al. https://doi.org/10.1016/j.trip.2026.101983
Saved (final revised paper)
Latest update: 13 Jun 2026
Short summary
This work studies how to compare the climate impact of the CO2 emitted and contrails formed by a flight. This is applied to contrail avoidance strategies that would decrease climate impact of flights by changing the trajectory of aircraft to avoid persistent contrail formation, at the risk of increasing CO2 emissions. We find that different comparison methods lead to different quantification of the total climate impact of a flight but lead to similar decisions of whether to reroute an aircraft.
This work studies how to compare the climate impact of the CO2 emitted and contrails formed by a...
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