Articles | Volume 18, issue 17
https://doi.org/10.5194/amt-18-4347-2025
https://doi.org/10.5194/amt-18-4347-2025
Research article
 | 
10 Sep 2025
Research article |  | 10 Sep 2025

Temperature-constrained lidar retrieval of planetary boundary layer height over Chiang Mai, Thailand

Ronald Macatangay, Thiranan Sonkaew, Sherin Hassan Bran, Worapop Thongsame, Titaporn Supasri, Mana Panya, Jeerasak Longmali, Raman Solanki, Ben Svasti Thomson, and Achim Haug

Cited articles

Bran, S. H., Macatangay, R., Surapipith, V., Chotamonsak, C., Chantara, S., Han, Z., and Li, J.: Surface PM2.5 mass concentrations during the dry season over northern Thailand: Sensitivity to model aerosol chemical schemes and the effects on regional meteorology, Atmos. Res., 277, 106303, https://doi.org/10.1016/j.atmosres.2022.106303, 2022. 
Bran, S. H., Macatangay, R., Chotamonsak, C., Chantara, S., and Surapipith, V.: Understanding the seasonal dynamics of surface PM2.5 mass distribution and source contributions over Thailand, Atmos. Environ., 331, 120613, https://doi.org/10.1016/j.atmosenv.2024.120613, 2024. 
Brooks, I.: Finding boundary layer top: application of a wavelet covariance transform to lidar backscatter profiles, J. Atmos. Ocean. Tech., 20, 1092–1105, 2003. 
Campbell, J. R., Hlavka, D. L., Welton, E. J., Flynn, C. J., Turner, D. D., Spinhirne, J. D., Scott, V. S., and Hwang, I. H.: Full-time, Eye-Safe Cloud and Aerosol Lidar Observation at Atmospheric Radiation Measurement Program Sites: Instrument and Data Processing, J. Atmos. Ocean. Tech., 19, 431–442, 2002. 
Ceilo code: Ceilometer Layer Identification and Optimization, GitHub [code], https://eprccaunam.github.io/ceilo/master.html, last access: 5 September 2025. 
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Short summary
Air pollution affects climate and health, but accurately measuring how pollutants mix in the atmosphere remains challenging. In Chiang Mai, Thailand, we developed a new light detection and ranging (lidar)-based method to better distinguish key atmospheric layers by incorporating temperature-based adjustments. This improves accuracy, especially at night, compared to traditional techniques. Our findings help refine air quality models and provide better data for tackling pollution in Southeast Asia.
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