Articles | Volume 19, issue 3
https://doi.org/10.5194/amt-19-1023-2026
https://doi.org/10.5194/amt-19-1023-2026
Research article
 | 
12 Feb 2026
Research article |  | 12 Feb 2026

Accurate humidity probe for persistent aviation-contrail conditions

Christoph Dyroff, Michael D. Moore, Bruce C. Daube, and Scott C. Herndon

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Cited articles

Appleman, H.: The formation of exhaust condensation trails by jet aircraft, Bull. Amer. Meteor. Soc., 34, 14–20, https://doi.org/10.1175/1520-0477-34.1.14, 1953. 
Bock, L. and Burkhardt, U.: The temporal evolution of a long-lived contrail cirrus cluster: Simulations with a global climate model, J. Geophys. Res.-Atmos., 121, 3548–3565, https://doi.org/10.1002/2015JD024475, 2016. 
Buchholz, B. and Ebert, V.: Absolute, pressure-dependent validation of a calibration-free, airborne laser hygrometer transfer standard (SEALDH-II) from 5 to 1200 ppmv using a metrological humidity generator, Atmos. Meas. Tech., 11, 459–471, https://doi.org/10.5194/amt-11-459-2018, 2018. 
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Short summary
We describe a new humidity probe designed for flight to characterize the very dry air at 10–12 km where jet aircraft can form persistent contrail clouds. These clouds trap heat and contribute to warming the planet. The laser-based system precisely measures water molecules in air, enabling accurate predictions of contrail formation to help reduce aviation's climate impact.
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