Parameter (units; all are 24 h means) | Number of observations | Arithmetic mean (SD) | Range | Interquartile range |
---|---|---|---|---|

AT, apparent temperature; BC, black carbon; PM_{2.5}, particles <2.5 μm in aerodynamic diameter, known as fine particles; SO_{4}^{2−}, sulphate. | ||||

*Particulate matter <2.5 μm in aerodynamic diameter measured by the Upright & Patashnik Tapered Element Oscillating Microbalance sampler. | ||||

†BC measured by aethalometer (Magee Scientific). | ||||

‡SO_{4}^{2−} measured by the Harvard Annular Denuder System or by ion chromatography. | ||||

AT (°C) | 92 | 7.1 (10.0) | (−7.9, 33.1) | 16.5 |

PM_{2.5}* (μg/m^{3}) | 92 | 11.4 (5.9) | (0.07, 33.7) | 7.6 |

BC† (μg/m^{3}) | 92 | 1.1 (0.8) | (0.2, 5.8) | 0.6 |

SO_{4}^{2−}‡ (μg/m^{3}) | 59 | 3.0 (2.0) | (0.5, 9.6) | 2.2 |