Table 1 Assessment of cross-validated predictions from the daily mean PM2.5 model by year.
Year | Number of stations | Observations | R2 | SD | RMSE | MAD | MAE |
|---|---|---|---|---|---|---|---|
2004 | 8 | 2751 | 0.76 | 12.02 | 5.86 | 9.12 | 3.91 |
2005 | 8 | 2701 | 0.81 | 14.80 | 6.43 | 11.28 | 4.38 |
2006 | 8 | 2685 | 0.68 | 13.19 | 7.48 | 9.55 | 5.04 |
2007 | 9 | 2855 | 0.71 | 10.87 | 5.85 | 8.16 | 4.28 |
2008 | 9 | 3040 | 0.64 | 12.16 | 7.29 | 9.27 | 4.61 |
2009 | 9 | 2670 | 0.75 | 10.14 | 5.09 | 7.71 | 3.61 |
2010 | 9 | 2844 | 0.79 | 11.70 | 5.41 | 8.83 | 3.64 |
2011 | 12 | 3019 | 0.77 | 11.53 | 5.56 | 8.90 | 3.88 |
2012 | 13 | 4025 | 0.76 | 10.10 | 4.95 | 7.63 | 3.59 |
2013 | 13 | 4362 | 0.80 | 11.75 | 5.25 | 8.85 | 3.87 |
2014 | 14 | 4203 | 0.73 | 9.87 | 5.10 | 7.50 | 3.86 |
2015 | 19 | 5194 | 0.77 | 10.78 | 5.11 | 7.90 | 3.76 |
2016 | 17 | 5307 | 0.83 | 11.44 | 4.73 | 8.56 | 3.37 |
2017 | 17 | 4901 | 0.80 | 10.79 | 4.78 | 8.42 | 3.15 |
2018 | 17 | 4633 | 0.84 | 9.91 | 3.94 | 7.19 | 2.83 |
2019 | 20 | 5175 | 0.86 | 11.50 | 4.26 | 7.98 | 2.85 |
