Research Article
Investigation of the Air Pollution Event in Beijing-Tianjin-Hebei Region in December 2016 Using WRF-Chem
Figure 6
(a)–(c) PM2.5 concentration horizontal distribution from CTL and difference between three sensitivity experiments and CTL; (d)–(f) HGT400-CTL; (g)–(i) HGT300-CTL; (j)–(l) HGT200-CTL (unit: µg/m3). Black arrows show wind field, and black dotted line indicates location of the hypothetical terrain. Times are 22:00 on 18 December 2016, 07:00 on 19 December, and 13:00 on 19 December.