Skip to main content
. Author manuscript; available in PMC: 2016 Jul 25.
Published in final edited form as: Atmos Environ (1994). 2014 Feb;84:65–77. doi: 10.1016/j.atmosenv.2013.11.031

Figure 5.

Figure 5

PMF-derived features identified as fertilized soil (a–d) and road salt (e). The black bars represent the average species contributions for the unconstrained models and the white bars represent the models with prior source profile constraints (see Table 1 and text). The bootstrapped 95% confidence limits are also shown. The circles refer to the percent of the total predicted concentration for a given species associated with that feature for the unconstrained (closed circles) and constrained (open circles) models.