Seasonal Formation, Sources, and Long-Term Evolution of PM2.5-Bound Water-Soluble Inorganic Ions in Nanchang, China: The Increasing Importance of Wintertime Nitrate
Water-soluble inorganic ions (WSIIs) are major components of PM2.5, yet their seasonal characteristics, formation, sources, and long-term evolution in Nanchang remain poorly resolved. Daytime and nighttime PM2.5 samples collected in summer and winter were analyzed for nine WSIIs using statistical, source-apportionment,...