Yugen Li

AS Atmospheric Sciences

The 2017 Outstanding Student Poster and PICO (OSPP) Award is awarded to Yugen Li for the poster/PICO entitled:

Quantifying the relationship between visibility degradation and PM2.5 constituents at a suburban site in Hong Kong: Differentiating contributions from hydrophilic and hydrophobic organic compounds (Li, Y.; Huang, H. X. H.; Griffith, S. M.; Wu, C.; Lau, A. K. H.; Yu, J. Z.)

Click here to download the poster/PICO file.

Yugen Li currently is a second year PhD student at Hong Kong University of Science and Technology. His research interests mainly focus on chemical analysis on ambient PM particles and its optical impact on visibility degradation. In this poster presentation, a series of localized empirical formula, estimating light extinction coefficient by the mass concentration of major inorganic and organic compounds, are modeled mathematically in comparison with original IMPROVE equation developed in the U.S.. These findings promote that quantifying organic matters by hydrophobicity is key to determine light extinction efficiency. In addition, it is promising to investigate more on localized equations which outperformed IMPROVE in reproducing Hong Kong visibility reduction issues.