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. Author manuscript; available in PMC: 2024 Feb 26.
Published in final edited form as: Sci Total Environ. 2018 May 17;639:40–48. doi: 10.1016/j.scitotenv.2018.05.144

Table 3.

Hourly LUR model performance in different polygonal regions of the MCMA

Pollutant Region Hourly time scale Monthly time scale
R2 NSE RMSE RSR MFE R2 NSE RMSE RSR MFE
PM2.5 All 0.364 0.320 13.32 0.825 0.413 0.765 0.764 3.266 0.486 0.097
I 0.379 0.306 14.31 0.833 0.411 0.778 0.775 3.235 0.475 0.090
II 0.368 0.336 12.94 0.815 0.391 0.651 0.620 3.765 0.617 0.103
III 0.381 0.343 12.35 0.810 0.398 0.801 0.795 2.800 0.453 0.100
IV 0.259 0.242 12.22 0.871 0.447 0.711 0.708 3.019 0.541 0.099
PM10 All 0.381 0.350 27.23 0.807 0.397 0.381 0.350 27.23 0.807 0.397
I 0.368 0.339 22.60 0.813 0.347 0.695 0.599 8.559 0.633 0.140
II 0.414 0.371 27.24 0.793 0.432 0.887 0.869 6.745 0.362 0.089
III 0.413 0.355 26.55 0.803 0.381 0.826 0.782 8.880 0.466 0.145
IV 0.306 0.285 23.61 0.845 0.419 0.843 0.777 5.955 0.473 0.110
O3 All 0.653 0.610 16.77 0.625 0.488 0.719 0.718 3.952 0.532 0.110
I 0.727 0.691 15.32 0.556 0.510 0.730 0.717 3.612 0.532 0.110
II 0.727 0.699 13.73 0.549 0.482 0.632 0.570 3.856 0.655 0.111
III 0.652 0.489 17.76 0.715 0.477 0.761 0.758 3.257 0.492 0.092
IV 0.682 0.168 27.70 0.912 0.530 0.776 0.489 5.873 0.715 0.145
NO2 All 0.512 0.502 10.68 0.706 0.324 0.820 0.818 3.343 0.427 0.103
I 0.459 0.427 12.60 0.757 0.283 0.714 0.660 3.849 0.583 0.088
II 0.422 0.393 10.94 0.779 0.339 0.768 0.747 3.264 0.503 0.115
III 0.589 0.558 7.906 0.665 0.337 0.779 0.771 3.184 0.478 0.149
IV 0.302 0.159 11.79 0.917 0.388 0.859 0.794 2.353 0.454 0.081
SO2 All 0.130 0.059 10.19 0.970 0.562 0.620 0.611 1.719 0.624 0.229
I 0.165 0.063 9.990 0.968 0.544 0.637 0.608 1.625 0.626 0.189
II 0.072 −0.011 13.90 1.005 0.629 0.441 −0.295 3.088 1.138 0.379
III 0.112 0.061 8.979 0.969 0.528 0.576 0.575 1.487 0.652 0.231
IV 0.083 0.042 7.182 0.979 0.573 0.508 0.499 1.359 0.708 0.207
CO All 0.530 0.497 0.426 0.709 0.379 0.593 0.588 0.167 0.642 0.168
I 0.531 0.484 0.478 0.719 0.343 0.559 0.535 0.148 0.682 0.129
II 0.528 0.409 0.492 0.769 0.408 0.440 0.388 0.164 0.782 0.156
III 0.528 0.489 0.317 0.715 0.436 0.498 0.474 0.162 0.725 0.220
IV 0.305 0.254 0.288 0.864 0.388 0.233 −0.355 0.157 1.164 0.216

R2 = coefficient of determination, NSE = Nash-Sutcliffe efficiency, RMSE = root mean square error, RSR = RMSE-observations standard deviation ratio, and MFE = mean fractional error; performance criteria are NSE ≥ 0.5, RSR ≤ 0.7 and MFE ≤ 0.5