Articles | Volume 26, issue 18
https://doi.org/10.5194/acp-26-13139-2026
https://doi.org/10.5194/acp-26-13139-2026
Research article
 | 
17 Sep 2026
Research article |  | 17 Sep 2026

Ozone downward flux revealed by high-resolution differential absorption lidar over Tibet during stratosphere-troposphere exchange

Ruichun Dong, Xin Fang, Chengyun Yang, and Tao Li

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Cited articles

Ancellet, G., Pelon, J., Beekmann, M., Papayannis, A., and Mégie, G.: Ground-based lidar studies of ozone exchanges between the stratosphere and the troposphere, J. Geophys. Res.-Atmos., 96, 22401–22421, https://doi.org/10.1029/91jd02385, 1991. 
Bertin, F., Campistron, B., Caccia, J. L., and Wilson, R.: Mixing processes in a tropopause folding observed by a network of ST radar and lidar, Ann. Geophys., 19, 953–963, https://doi.org/10.5194/angeo-19-953-2001, 2001. 
Boggess, A. and Narcowich, F. J.: A first course in wavelets with Fourier analysis, 2nd edn., John Wiley and Sons, ISBN 978-0-470-43117-7, 2009. 
Browell, E. V., Ismail, S., and Shipley, S. T.: Ultraviolet DIAL measurements of O3 profiles in regions of spatially inhomogeneous aerosols, Appl. Optics, 24, 2827–2836, https://doi.org/10.1364/ao.24.002827, 1985. 
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High-resolution USTC (University of Science and Technology of China) Ozone Lidar observations at Yangbajing, Tibet capture short-lived rapid STE (stratosphere-to-troposphere exchange)-related ozone descent for the first time. Lidar temperature profiles link these events to tropopause thermal variability unresolved by conventional models. Wei’s flux diagnostic and PV (potential vorticity)-threshold sensitivity identify 3 PVU (potential vorticity units) as optimal. ERA5 shows gravity-wave modulation during tropopause folding, and lidar ozone profiles are used to quantify instantaneous cross-tropopause ozone flux.
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