Evolution of planetary boundary layer under different weather conditions, and its impact on aerosol concentrations

► Planetary boundary layer (PBL) heights were determined by three remote sensing instruments from September 9-30, 2010 at Tianjin, China. ► The averaged PBL height was about 1000-1300 m during noon/afternoon-time, and 200-300 m during night-time. ► PBL height and aerosol concentration were anti-correlated during clear and haze conditions. Feedback between PBL height and aerosol loading may exist.