Long-term Analysis of PM_2.5 Monitoring Data and Pollution Event Interpretation in Taiwan's Urban Areas  In recent years, air pollution has become an increasing concern for the public. Therefore, understanding whether air quality has consistently improved, the causes of pollution events, and the major emission sources are crucial pieces of information. By analyzing long-term monitoring data and examining the regional pollution characteristics during pollution seasons, the main sources and causes of pollution can be identified. This information is essential for regulatory agencies to develop effective control strategies.

Aerosol Water Content  Certain highly hygroscopic aerosols tend to deliquesce in environments with high relative humidity. After deliquescence, the aerosol particle size increases, further affecting the optical properties of the aerosols, making them a significant factor in air pollution's impact on visibility. Additionally, the water content in deliquesced aerosols can serve as a reaction medium for the formation of secondary aerosols. Research on aerosol water content provides important foundational data for related model simulations and the investigation of atmospheric processes.