To quantify how ammonia and nitrate availability affects PM2.5 mass concentrations in Hong Kong.
Analyzed four years of hourly measurement data from Hong Kong
Measured concentrations of PM2.5, ammonia, and nitrate
Conducted statistical assessments to determine relationships between components
Ammonium and nitrate significantly contribute to PM2.5 levels
Changes in ammonia and nitrate availability reflect alterations in PM2.5 mass
Findings indicate that urban air quality management should consider these components
Abstract
Ammonium and nitrate are major components of PM2.5, and their fractional contributions to urban PM2.5 in China have increased in recent years, largely due to successful sulfate reductions. Owing to...