Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 44, issue 1
Articles | Volume 44, issue 1
https://doi.org/10.5194/angeo-44-331-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-44-331-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 44, issue 1
Regular paper
 | 
18 May 2026
Regular paper |  | 18 May 2026

Studies of noctilucent clouds from the stratosphere during the 2024 TRANSAT balloon flight

Peter Dalin, Hidehiko Suzuki, Nikolay Pertsev, Vladimir Perminov, Linda Megner, Johan Kero, Peter Voelger, Jonas Hedin, Gerd Baumgarten, Anne Réchou, and Denis Efremov

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Short summary
A transatlantic scientific balloon flight (TRANSAT) was conducted in June 2024. The TRANSAT balloon floated in the stratosphere at approximately 40 km altitude between Sweden and Canada for about 4 days. An optical imager was installed on the TRANSAT balloon to study noctilucent cloud (NLC). Nearly continuous observations of NLC were obtained during the entire flight. A complex NLC structures exhibiting different motions were found to result from wind rotation with altitude between 80 and 94 km.
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