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-26-2007-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/acp-26-2007-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 3
Research article
 | 
09 Feb 2026
Research article |  | 09 Feb 2026

Impact of small-scale orography on deep boundary layer evolution and structure over the Tibetan Plateau

Ivan Basic, Harshwardhan Jadhav, Jaydeep Singh, and Juerg Schmidli

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Cited articles

Bašić, I. and Jadhav, H.: Raw LES output from CM1, Zenodo [data set], https://doi.org/10.5281/zenodo.17093768, 2025. a
Borges, R., Carmona, M., Costa, B., and Don, W. S.: An improved weighted essentially non-oscillatory scheme for hyperbolic conservation laws, Journal of Computational Physics, 227, 3191–3211, https://doi.org/10.1016/j.jcp.2007.11.038, 2008. a
Bryan, G. H. and Fritsch, J. M.: A Benchmark Simulation for Moist Nonhydrostatic Numerical Models, Monthly Weather Review, 130, 2917–2928, https://doi.org/10.1175/1520-0493(2002)130<2917:ABSFMN>2.0.CO;2, 2002 (data available at: https://www2.mmm.ucar.edu/people/bryan/cm1/, last access: 17 September 2025). a, b
Che, J. and Zhao, P.: Characteristics of the summer atmospheric boundary layer height over the Tibetan Plateau and influential factors, Atmos. Chem. Phys., 21, 5253–5268, https://doi.org/10.5194/acp-21-5253-2021, 2021. a, b, c, d
Chen, X. and Ma, Y.: The unique atmospheric boundary layer over the Tibetan Plateau, Chinese Science Bulletin, 70, 4180–4187, https://doi.org/10.1360/TB-2024-1294, 2025. a
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We studied how small mountains shape the daily growth of the lower atmosphere over the Tibetan Plateau, one of the highest regions on Earth. Using computer simulations, we compared flat terrain with realistic terrain and with added winds. We found that even modest hills make the air mix more quickly and rise higher, and winds further strengthen this effect. Our results show that overlooking small terrain features can lead to underestimating how strongly the atmosphere mixes over high plateaus.
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