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. Author manuscript; available in PMC: 2020 Jul 14.
Published in final edited form as: Atmos Environ (1994). 2019 Oct 1;214:10.1016/j.atmosenv.2019.116883. doi: 10.1016/j.atmosenv.2019.116883

Figure 2:

Figure 2:

Spatial correlations of annual median concentrations between trace metals and PM2.5 along with its major components over continental North America by observations and the standard simulation. Trace metals from bottom to top are in the order of their correlations with PM2.5 in the observation. The left panel shows the correlations across measurements sites while the right panel shows the correlation for the simulation domain of North America.