Table 2.
Aerosol mass concentration and chemical variables average values. Comparison between the investigated Saharan dust advections and non-Saharan (NE, NW, RG and total non-SH average) samples. Errors are given as standard deviations. Mean values for the 2014/2015 are also reported. All data in μg m−3 except when indicated.
| SH | NE | NW | RG | 2014/2015 | |
|---|---|---|---|---|---|
| PM10 | 35.1 ± 29.4 | 14.5 ± 4.2 | 7.3 ± 1.9 | 12.1 ± 5.9 | 10.6 |
| PM2.5 | 15.4 ± 9.6 | 10.1 ± 0.9 | 5.0 ± 0.5 | 9.4 ± 4.0 | 7.7 |
| PMcoarse | 19.7 ± 20.0 | 4.5 ± 3.3 | 2.3 ± 1.6 | 2.7 ± 2.2 | 3.9 |
| PM2.5/PM10 | 0.52 ± 0.2 | 0.71 ± 0.2 | 0.70 ± 0.1 | 0.81 ± 0.1 | 0.73 |
| Catot | 3.0 ± 3.0 | 0.14 ± 0.2 | 0.38 ± 0.3 | 0.66 ± 1.0 | |
| Ca2+ | 1.2 ± 0.3 | 0.3 ± 0.2 | 0.3 ± 0.2 | 0.3 ± 0.2 | 0.7 ± 1.0 |
| Fe | 1.5 ± 2.1 | 0.18 ± 0.1 | 0.19 ± 0.17 | 0.13 ± 0.05 | 0.7 ± 1.3 |
| Ti | 0.06 ± 0.07 | 0.02 ± 0.05 | 0.02 ± 0.05 | 0.1 ± 0.08 | 0.05 ± 0.01 |
| NH4+/NO3− | 0.10 ± 0.09 | 0.46 ± 0.2 | 0.39 ± 0.2 | 0.46 ± 0.8 | 0.29 ± 0.2 |
| NO3−/SO42− | 1.8 ± 0.6 | 0.64 ± 0.3 | 2.9 ± 0.2 | 0.68 ± 0.8 | 0.9 ± 0.5 |
| K+ | 0.15 ± 0.2 | 0.19 ± 0.01 | 0.05 ± 0.04 | 0.07 ± 0.1 | 0.26 ± 0.1 |
| SO42− | 1.4 ± 1.4 | 4.2 ± 0.5 | 1.2 ± 1.5 | 2.3 ± 0.9 | 1.7 ± 1.4 |
| OC | 3.3 ± 1.5 | 3.9 ± 1.7 | 1.9 ± 0.5 | 3.2 ± 1.7 | 2.8 ± 0.9 |
| EC | 0.3 ± 0.2 | 0.3 ± 0.1 | 0.12 ± 0.03 | 0.2 ± 0.1 | 0.20 ± 0.1 |
| ΣPAH (pg m−3) | 280 ± 150 | 200 ± 130 | 53 ± 14 | 440 ± 700 | 230 ± 220 |
| BaP (pg m−3) | 11 ± 8 | 7.9 ± 5 | 1.3 ± 1.3 | 16 ± 28 |