Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 3
Articles | Volume 26, issue 3
https://doi.org/10.5194/acp-26-1665-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-1665-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 3
Research article
 | 
02 Feb 2026
Research article |  | 02 Feb 2026

Strateole 2 balloons reveal persistent errors in reanalyzed winds and trajectory calculations in the tropical lower stratosphere

Pierre Cadiou, Riwal Plougonven, Aurélien Podglajen, Albert Hertzog, and Alexandra Mac Farlane

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Short summary
Winds in the Equatorial region remain difficult to model. We take advantage of long-duration balloon campaigns from 2019 and 2021 to assess errors in winds between 18 and 20 km in a weather forecast model. Large errors persist: one third of the time, the error is larger than 3.5 m per second. This has implications for research studies that calculate air mass trajectories in this transition region between the troposphere and the stratosphere.
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