Research Article
Investigation of the Air Pollution Event in Beijing-Tianjin-Hebei Region in December 2016 Using WRF-Chem
Figure 7
(a) Vertical cross section of PM2.5 diffusion from CTL, and (b) differences of HGT400 and CTL simulations. (c) Differences of HGT300 and CTL simulations. (d) Differences of HGT200 and CTL simulations. Shading indicates PM2.5 concentrations (unit: µg/m3), contours show temperature (unit: °C), black arrows depict wind field, and green solid circles on the horizontal axis indicate locations of Hengshui and Beijing. Time is 22:00 on 18 December 2016.
| (a) |
| (b) |
| (c) |
| (d) |