Vertical structure of foggy haze over the Beijing–Tianjin–Hebei area in January 2013

In January 2013, frequent episodes of intense air pollution occurred in the Beijing–Tianjin–Hebei area (BTH), China. Besides the occurrence of region-wide dry haze pollution, foggy haze conditions also developed across the region on numerous days, lasting into the afternoon. Synergistic analysis, using multisatellite datasets, air sounding and surface meteorological observations, indicated that there was a vertical overlap of fog and aerosol...