Articles | Volume 18, issue 20
https://doi.org/10.5194/amt-18-5321-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-5321-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
The AquaVIT-4 intercomparison of atmospheric hygrometers
Simone Brunamonti
Laboratory for Air Pollution/Environmental Technology, Empa, 8600 Dübendorf, Switzerland
Harald Saathoff
Institute of Meteorology and Climate Research – Atmospheric Aerosol Research, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Albert Hertzog
Laboratoire de Météorologie Dynamique, IPSL, Sorbonne Université, Ecole Polytechnique, 91 128 Palaiseau, France
Glenn Diskin
NASA Langley Research Center, Hampton, VA 23681, USA
Masatomo Fujiwara
Faculty of Environmental Earth Science, Hokkaido University, Sapporo, 060-0810, Japan
Karen Rosenlof
NOAA Chemical Sciences Laboratory, CSL-8, Boulder, CO 80305, USA
Ottmar Möhler
Institute of Meteorology and Climate Research – Atmospheric Aerosol Research, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Béla Tuzson
Laboratory for Air Pollution/Environmental Technology, Empa, 8600 Dübendorf, Switzerland
Lukas Emmenegger
Laboratory for Air Pollution/Environmental Technology, Empa, 8600 Dübendorf, Switzerland
Nadir Amarouche
INSU Division Technique, 1 avenue de la terrasse, 91190 Gif-sur-Yvette, France
Georges Durry
Laboratoire de Météorologie Dynamique, IPSL, Sorbonne Université, Ecole Polytechnique, 91 128 Palaiseau, France
Fabien Frérot
INSU Division Technique, 1 avenue de la terrasse, 91190 Gif-sur-Yvette, France
Jean-Christophe Samake
INSU Division Technique, 1 avenue de la terrasse, 91190 Gif-sur-Yvette, France
Claire Cenac
Laboratoire de Météorologie Dynamique, IPSL, Sorbonne Université, Ecole Polytechnique, 91 128 Palaiseau, France
Julio Lopez
Laboratoire de Météorologie Dynamique, IPSL, Sorbonne Université, Ecole Polytechnique, 91 128 Palaiseau, France
Paul Monnier
Laboratoire de Météorologie Dynamique, IPSL, Sorbonne Université, Ecole Polytechnique, 91 128 Palaiseau, France
Mélanie Ghysels
CORRESPONDING AUTHOR
Groupe de Spectrométrie Moléculaire et Atmosphérique, Université de Reims, CNRS, UFR Sciences Exactes et Naturelles, Moulin de la Housse B.P. 1039, 51687 Reims Cedex 2, France
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Latest update: 25 Nov 2025
Short summary
Water vapor is a strong greenhouse gas, and accurate measurements of its concentration in the upper atmosphere (~8–25 km altitude) are crucial for reliable climate predictions. We investigated the performance of four airborne hygrometers, deployed on aircraft or stratospheric balloon platforms and based on different techniques, in a climate simulation chamber. The results demonstrate the high accuracy and reliability of the involved sensors for atmospheric monitoring and research applications.
Water vapor is a strong greenhouse gas, and accurate measurements of its concentration in the...