Table 2.
The means and the standard deviations of the concentration (μg C m−3) of each source. The mean relative contribution (%) of each source to carbonaceous component of PM2.5 is in parentheses.
| Fossil fuel | C4 plants | C3 plants | |
|---|---|---|---|
| TRF | |||
| Spring (Mar.–May) | 1.5 ± 0.3 (29) | 1.2 ± 0.9 (22) | 2.5 ± 0.6 (49) |
| Summer (Jun.–Aug.) | 2.1 ± 0.5 (52) | 0.4 ± 0.1 (10) | 1.8 ± 1.2 (38) |
| Fall (Sep.–Nov.) | 1.7 ± 0.3 (44) | 0.4 ± 0.1 (12) | 1.9 ± 0.6 (44) |
| Winter (Dec.–Feb.) | 2.7 ± 0.8 (44) | 1.2 ± 0.4 (19) | 2.3 ± 1.1 (37) |
| Total | 2.1 ± 0.7 (46) | 0.8 ± 0.6 (19) | 2.1 ± 1.0 (35) |
| HUF | |||
| Fall (10/13/2020) | 2.4 (44) | 0.8 (15) | 2.2 (41) |
| Winter (02/20/2020) | 4.2 (48) | 1.6 (18) | 2.9 (34) |
| Total | 3.3 ± 0.9 (46) | 1.2 ± 0.4 (17) | 2.6 ± 0.3 (38) |
| CRI | |||
| Fall (10/14–16/2020) | 4.9 ± 0.6 (51) | 1.7 ± 0.3 (18) | 2.9 ± 0.4 (31) |
| Winter (02/21–24/2020) | 3.6 ± 0.5 (51) | 1.5 ± 0.5 (21) | 1.9 ± 0.3 (28) |
| Total | 4.2 ± 0.9 (51) | 1.6 ± 0.4 (21) | 2.4 ± 0.6 (29) |
| SNU | |||
| Spring (Mar.–May) | 4.4 ± 1.8 (43) | 3.0 ± 2.7 (25) | 3.3 ± 1.9 (32) |
| Summer (Jun.–Aug.) | 3.5 ± 1.3 (62) | 1.0 ± 0.5 (15) | 1.5 ± 0.8 (24) |
| Fall (Sep.–Nov.) | 2.5 ± 0.5 (56) | 0.8 ± 0.4 (20) | 1.1 ± 0.2 (24) |
| Winter (Dec.–Feb.) | 6.1 ± 1.9 (43) | 5.3 ± 2.9 (32) | 3.5 ± 1.6 (25) |
| Total | 4.3 ± 0.01 (51) | 2.7 ± 0.01 (21) | 2.6 ± 0.01 (27) |