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. 2014 Oct 24;123(2):135–143. doi: 10.1289/ehp.1408646

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PM_2.5 time series at the four sub-areas identified in Figure 4. Black dots and vertical lines denote monthly mean and 25th–75th percentile of satellite-derived values. Corresponding ground-level monitor (red x) and satellite-derived coincident with ground-level monitor (blue diamonds) PM_2.5 are also shown for Detroit in the same notation. Trend and 95% CIs based on these values are provided in the keys. Supplemental Material, Figures S4–S6, overlay satellite-derived PM_2.5 values with those collected from the literature for Beijing, New Delhi, and Kuwait City.

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