Characterization of secondary formation of wintertime PM2.5 in eastern China: The role of relative humidity

Puntos clave

• The study reveals a strong correlation between relative humidity and secondary PM2.5 formation in winter months.
• Relative humidity levels above 70% contribute to increased PM2.5, impacting air quality significantly.
• Observational analysis across multiple eastern Chinese cities identifies patterns in secondary formation due to humidity.
• These findings suggest further investigations are needed to evaluate long-term trends and mitigation strategies.