Characteristics of Gaseous Pollutants at a Regional Background Station in Southern China |
Figure 3 The results of the cluster analysis of backward trajectories, and the proportions of different clusters shown in the bottom-right of the figure. The background color represents the emissions of a NO x , b SO 2 , and c CO from the Intercontinental Chemical Transport Experiment-Phase B INTEX-B inventory units: t yr -1 . |