Research Article
Examining the Impact of Nitrous Acid Chemistry on Ozone and PM over the Pearl River Delta Region
Table 2
Model performance of gaseous pollutant and particulate matter simulation over Hong Kong in October 2004 for case CB05.
| | | SO2 (ppb) | (ppb) | O3 (ppb) | PM2.5 (μg m−3) | ASO4 (μg m−3) | ANO3 (μg m−3) |
| | CW | Obv | 18.6 | 47.3 | 42.5 | 76.2 | 21.6 | 4.4 | | Sim | 14.9 | 50.6 | 36.4 | 40.7 | 17.3 | 0.2 | | IOA* | 0.54 | 0.68 | 0.73 | 0.48 | 0.54 | 0.30 | | RMSE* | 4.8 | 20 | 14.3 | 41.3 | 12.1 | 4.0 | | MNB* (%) | −19.3 | 7.3 | −23.6 | −44.6 | −16.9 | −95.2 | | MNE* (%) | 39.3 | 48.6 | 42.5 | 45.5 | 38.9 | 95.4 |
| | TM | Obv | 8.6 | 18.6 | 63.2 | 62.5 | — | — | | Sim | 5.0 | 9.2 | 59.3 | 38.8 | — | — | | IOA* | 0.44 | 0.44 | 0.75 | 0.51 | — | — | | RMSE* | 3.6 | 11 | 11.1 | 33.6 | — | — | | MNB* (%) | −26.9 | −50.2 | −3.9 | −39.8 | — | — | | MNE* (%) | 52.1 | 57.3 | 25.1 | 48.2 | — | — |
| | TW | Obv | 11.0 | 70.6 | 53.7 | 69.3 | — | — | | Sim | 6.8 | 62.8 | 30.2 | 35.5 | — | — | | IOA* | 0.43 | 0.59 | 0.52 | 0.50 | — | — | | RMSE* | 4.5 | 39 | 21.6 | 40.9 | — | — | | MNB* (%) | −40.3 | −10.6 | −47.6 | −40.5 | — | — | | MNE* (%) | 48.3 | 55.2 | 79.6 | 44.6 | — | — |
| | TC | Obv | 16.9 | 43.2 | 80.6 | 72.6 | — | — | | Sim | 11.2 | 36.1 | 59.1 | 44.9 | — | — | | IOA | 0.58 | 0.71 | 0.77 | 0.43 | — | — | | RMSE | 6.9 | 21 | 18.2 | 45.1 | — | — | | MNB (%) | −26.3 | −10.8 | −33.2 | −40.6 | — | — | | MNE (%) | 50.3 | 47.2 | 54.3 | 42.5 | — | — |
| | YL | Obv | 24.9 | 84.1 | 89.3 | 72.6 | 18.3 | 6.9 | | Sim | 18.6 | 47.6 | 60.2 | 45.1 | 14.3 | 1.3 | | IOA* | 0.49 | 0.65 | 0.81 | 0.56 | 0.56 | 0.29 | | RMSE* | 5.2 | 36 | 15.3 | 40.2 | 10.3 | 6.1 | | MNB* (%) | −22.1 | −40.1 | −28.1 | −45.1 | −23.5 | −81.7 | | MNE* (%) | 44.1 | 54.1 | 39.9 | 49.6 | 39.6 | 83.7 |
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*IOA: index of agreement, RMSE: root mean square error, MNB: mean normalized bias, MNE: mean normalized error.
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