Table 3.
Combined-Cities Model with Profile Constraints: Pairwise Correlations between Predicted and Observed species by Feature, City and Season
| Feature | Pairwise Correlationsa (Summer / Winter) | ||||
|---|---|---|---|---|---|
| Cu | Zn | P | Si | ||
| Chicago | Brake Wear | 0.71 (0.68 / 0.76) | 0.15 (0.09 / 0.22) | 0.23 (0.20 / 0.24) | 0.23 (0.17 / 0.45) |
| Tire Wear | 0.67 (0.70 / 0.67) | 0.94 (0.93 / 0.97) | 0.51 (0.44 / 0.61) | 0.53 (0.59 / 0.78) | |
| Soil | 0.63 (0.60 / 0.75) | 0.62 (0.61 / 0.80) | 0.29 (0.56 / 0.51) | 0.97 (0.98 / 0.97) | |
| Fertilized Soil | −0.48 (−0.58 / −0.35) | −0.52 (−0.78 / −0.24) | 0.31 (−0.01 / 0.43) | −0.31 (−0.3 / −0.12) | |
| Pb-Rich | 0.57 (0.63 / 0.52) | 0.89 (0.93 / 0.84) | 0.59 (0.55 / 0.66) | 0.50 (0.58 / 0.68) | |
| St. Paul | Brake Wear | 0.33 (0.90 / 0.39) | 0.43 (0.55 / −0.08) | 0.54 (0.26 / −0.21) | 0.70 (0.44 / −0.04) |
| Tire Wear | 0.57 (0.75 / 0.41) | 1.00 (1.00 / 0.99) | 0.43 (0.54 / 0.50) | 0.41 (0.64 / 0.57) | |
| Soil | −0.10 (0.71 / −0.30) | 0.37 (0.70 / −0.24) | 0.79 (0.60 / −0.56) | 0.98 (0.97 / −0.14) | |
| Fertilized Soil | −0.21 (0.15 / −0.10) | 0.29 (0.24 / 0.52) | 0.90 (0.78 / 0.87) | 0.76 (0.50 / 0.28) | |
| Road Salt | 0.49 (0.65 / 0.88) | −0.04 (0.85 / 0.43) | −0.65 (0.39 / 0.25) | −0.78 (0.54 / 0.82) | |
| Winston- Salem |
Brake Wear | 0.95 (0.98 / 0.92) | 0.31 (0.02 / 0.55) | 0.21 (0.17 / 0.57) | 0.44 (0.58 / 0.37) |
| Tire Wear | 0.39 (0.13 / 0.62) | 1.00 (1.00 / 1.00) | 0.03 (0.38 / 0.35) | 0.40 (0.28 / 0.43) | |
| Soil | 0.30 (0.47 / 0.25) | 0.30 (0.21 / 0.27) | −0.28 (0.25 / 0.42) | 0.94 (0.95 / 0.96) | |
| Fertilized Soil | 0.07 (−0.05 / 0.37) | −0.01 (0.26 / 0.31) | 0.94 (0.84 / 0.78) | −0.21 (0.07 / 0.14) | |
a
Pearson correlation coefficient between measured species concentration and predicted source contribution from baseline model; values with p <0.05 are shown in bold