Research Article
Investigation of the Air Pollution Event in Beijing-Tianjin-Hebei Region in December 2016 Using WRF-Chem
Figure 8
(a)–(c) Vertically integrated concentration of PM2.5 from CTL. (d)–(f) Differences of HGT400 and CTL. (g)–(i) Differences of HGT300 and CTL. (j)–(l) Differences of HGT200 and CTL(unit: mm). Black dotted line indicates location of hypothetical terrain. Times are 22:00 on 18 December 2016, 07:00 on 19 December, and 13:00 on 19 December.