Contrails cause significant atmospheric radiative effects.
the verdict
SUPPORTED
the evidence backs this
confidence 70/100
The overwhelming body of scientific literature demonstrates that aviation contrails and contrail cirrus exert substantial positive radiative forcing, representing a major component of anthropogenic climate change. While some observational studies suggest models may occasionally overestimate these effects, the consensus strongly supports the conclusion that contrails cause significant atmospheric radiative forcing.
Evidence for · 11
The contribution of global aviation to anthropogenic climate forcing for 2000 to 2018.
2021 · cited by 120
Contrail cirrus is identified as yielding the largest positive net effective radiative forcing term among aviation climate impacts.
Evidence against · 1
An Observational Constraint on Aviation-Induced Cirrus From the COVID-19-Induced Flight Disruption.
2021 · cited by 4
Satellite observations during pandemic flight reductions suggest that previous model-based estimates may overestimate aviation-induced cirrus warming.
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More for · 10
Formation and radiative forcing of contrail cirrus.
2018 · cited by 38
Aircraft-produced contrail cirrus clouds are recognized as contributing significantly to anthropogenic climate change.
How to make climate-neutral aviation fly.
2023 · cited by 19
Non-CO2 climate impacts, driven heavily by contrails, account for up to 80% of aviation's total climate footprint.
Contrail Cirrus Climate Impact: From Radiative Forcing to Surface Temperature Change
2025 · cited by 13
Global climate model simulations confirm that contrail cirrus exerts substantial radiative forcing, although efficacy parameters vary.
Liquid Hydrogen: A Mirage or Potent Solution for Aviation's Climate Woes?
2023 · cited by 4
Contrail cirrus makes up a large majority of combustion climate impacts for alternative fuels like liquid hydrogen.
Quantification of the radiative forcing of contrails embedded in cirrus clouds.
2025 · cited by 2
Embedded contrails are found to be a non-negligible contributor to aviation's overall radiative forcing impact on climate.
Most long-lived contrails form within cirrus clouds with uncertain climate impact.
2025 · cited by 2
Contrails within specific cloud cover regions are shown to cause significant additional warming.
Aviation Contrail Cirrus and Radiative Forcing Over Europe During 6 Months of COVID-19.
2021 · cited by 2
Modeled instantaneous radiative contrail forcing shows large regional drops when air traffic declines.
A comprehensive well-to-wake climate impact assessment of sustainable aviation fuel.
2025 · cited by 1
Inflight non-CO2 emissions and contrails are crucial factors that significantly increase the total global warming effects of aviation.
Strong simulated reductions in contrail cirrus effective radiative forcing from alternative fuels
2026 · cited by 0
Global assessments demonstrate that contrail cirrus produces substantial baseline effective radiative forcing that alternative fuels aim to mitigate.
Observation-Based Assessment of Contrail Climate Effects across the Euro-Atlantic Region in 2023
2026 · cited by 0
Observation-based frameworks confirm that aviation contrails drive a dominant and highly concentrated share of regional climate warming.