Table 2 Spearman correlation between air pollutants and meteorological conditions in Ningbo, China, 2011–2015
PM2.5 | PM10 | SO2 | NO2 | Temperature (°C) | Relative humidity (%) | |
|---|---|---|---|---|---|---|
PM2.5 | 1.00 | 0.95 | 0.78 | 0.76 | −0.47 | −0.28 |
PM10 | 0.95 | 1.00 | 0.83 | 0.76 | −0.46 | −0.42 |
SO2 | 0.78 | 0.83 | 1.00 | 0.79 | −0.57 | −0.42 |
NO2 | 0.76 | 0.76 | 0.79 | 1.00 | −0.59 | −0.13 |
Temperature (°C) | −0.47 | −0.46 | −0.57 | −0.59 | 1.00 | 0.13 |
Relative humidity (%) | −0.28 | −0.42 | −0.42 | −0.13 | 0.13 | 1.00 |