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. 2022 Jan 11;10(1):33. doi: 10.3390/toxics10010033

Table 4.

Comprehensive correlations between PE to each pollutant (BC, NO2, and PM2.5) and background stations (Paris XIIIe for BC; Paris VIIe, Paris XIIe, and Paris XIIIe for NO2; and Paris IVe for PM2.5) for each campaign (spring, autumn, and winter), for each time averaging (1-h and 1-day), for the correlations of Spearman and Pearson, and for each campaign as a whole (rs and rp) and in-between the volunteers (In-vol rs and In-vol rP). This last metric refers to the correlation between each volunteer (taken separately) and the monitoring station. The value range is given here (as min, max).

Campaign Station Pollutant 1-h Average 1-Day Average
rS rP In-vol. rS In-vol. rP rS rP In-vol. rS In-vol. rP
Spring Paris XIIIe BC 0.58 0.34 0.45, 0.74 0.23, 0.52 0.52 0.57 0.30, 0.90 0.29, 0.97
Paris VIIe NO2 0.27 0.26 0.21, 0.47 0.14, 0.38 0.17 0.26 −0.70, 0.60 −0.49, 0.86
Paris XIIe NO2 0.13 0.14 0.07, 0.47 0.05, 0.40 0.25 0.28 −0.30, 1.00 −0.24, 0.99
Paris XIIIe NO2 0.19 0.24 0.07, 0.50 0.10, 0.51 0.25 0.30 −0.40, 1.00 −0.49, 1.00
Paris IVe PM2.5 0.51 0.12 0.15, 0.69 −0.14, 0.68 0.64 0.41 −0.20, 1.00 −0.51, 0.97
Autumn Paris XIIIe BC 0.71 0.54 0.67, 0.79 0.51, 0.66 0.74 0.68 0.48, 0.95 0.49, 0.96
Paris VIIe NO2 0.20 0.07 0.02, 0.52 −0.15, 0.49 0.07 0.02 −0.38, 0.90 −0.33, 0.93
Paris XIIe NO2 0.13 0.10 −0.16, 0.55 −0.13, 0.64 0.10 0.17 −0.94, 0.67 −0.77, 0.74
Paris XIIIe NO2 0.15 0.06 −0.07, 0.38 −0.18, 0.45 0.10 0.04 −0.83, 0.62 −0.83, 0.60
Paris IVe PM2.5 0.58 0.30 0.15, 0.88 0.00, 0.76 0.56 0.36 0.48, 0.90 −0.36, 0.94
Winter Paris XIIIe BC 0.59 0.35 0.28, 0.77 0.07, 0.56 0.70 0.68 0.29, 0.93 0.07, 0.92
Paris VIIe NO2 0.16 0.23 −0.08, 0.48 −0.01, 0.53 0.35 0.40 0.10, 0.80 0.18, 0.67
Paris XIIe NO2 0.07 0.15 −0.17, 0.43 −0.15, 0.42 0.30 0.40 −0.40, 0.71 −0.05, 0.69
Paris XIIIe NO2 0.10 0.19 −0.07, 0.38 −0.04, 0.43 0.35 0.41 −0.40, 0.79 −0.20, 0.65
Paris IVe PM2.5 0.66 0.23 0.39, 0.84 −0.01, 0.79 0.55 0.38 −1.00, 0.97 −1.00, 0.95