Assessing Spatiotemporal Characteristics of Urban PM2.5 Using Fractal Dimensions and Wavelet Analysis

Figure 1

Schematic diagram of the study region: (a, b) Beijing location; (c) Beijing administrative division and 35 ground monitoring stations; (d) major sources of PM2.5 such as mobile sources, dust sources, coal combustion, and industrial sources in Beijing, as well as the locations of the three section lines of analysis.

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