Figure 1
From: Decreasing concentrations of carbonaceous aerosols in China from 2003 to 2013
Comparisons of PM2.5 OC and EC between 2003 and 2013 indicated by bar height for: (a) summer OC, (b) winter OC, (c) summer EC, and (d) winter EC. The 2013 study includes ten cities in northern China (i.e., Changchun [CC], Urumqi [UR], Beijing [BJ], Tianjin [TJ], Jinchang [JC], Yulin [YL], Taiyuan [TY], Qingdao [QD], Xining [XN], and Xi’an [XA]) and nine cities in southern China (i.e., Nanjing [NJ], Shanghai [SH], Hangzhou [HZ], Wuhan [WH], Chengdu [CD], Chongqing [CQ], Xiamen [XM], Guangzhou [GZ], and Hong Kong [HK]).
