Investigating the wintertime evolution of the atmospheric boundary layer thermodynamic structure in southern Taiwan

Lin Hung; Chian-Yi Liu; Sheng-Chia Chang; Shen-Cha Hsu; Meng-Yue Lin

doi:10.1117/12.3046016

3 January 2025 Investigating the wintertime evolution of the atmospheric boundary layer thermodynamic structure in southern Taiwan

Lin Hung, Chian-Yi Liu, Sheng-Chia Chang, Shen-Cha Hsu, Meng-Yue Lin

Author Affiliations +

Proceedings Volume 13262, Remote Sensing of the Atmosphere, Clouds, and Precipitation VIII; 132620T (2025) https://doi.org/10.1117/12.3046016
Event: Asia-Pacific Remote Sensing, 2024, Kaohsiung, Taiwan

Conference Poster

Abstract

This study examines the atmospheric boundary layer (ABL) structure and temperature inversion characteristics in the Chiayi region of Taiwan during wintertime, using high vertical and temporal resolution data from a microwave radiometer (MWR). The results show that surface-based inversions (SBIs) exhibit a distinct diurnal pattern, with the frequency of SBIs being much higher at night, reaching nearly 100% between 05:00 and 08:00 LST, primarily due to surface longwave cooling. Temperature inversions are associated with surface conditions of higher relative humidity, lower temperatures, and weaker wind speeds, which contribute to the stability of the inversion layer and inhibit vertical mixing. Interestingly, the mixing ratio remains stable despite the presence of inversions, suggesting that the increase in relative humidity during inversion events is likely due to surface cooling or weak winds, rather than an increase in water vapor. Further flux analysis is needed to confirm the causes of the increase in relative humidity.

(2025) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lin Hung, Chian-Yi Liu, Sheng-Chia Chang, Shen-Cha Hsu, and Meng-Yue Lin "Investigating the wintertime evolution of the atmospheric boundary layer thermodynamic structure in southern Taiwan", Proc. SPIE 13262, Remote Sensing of the Atmosphere, Clouds, and Precipitation VIII, 132620T (3 January 2025); https://doi.org/10.1117/12.3046016

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