Table 2 Deming regression results for \(\:(\frac{\text{O}\text{C}}{\text{E}\text{C}}{)}_{\text{p}\text{r}\text{i}}\) in different seasons.

From: Source apportionment and dynamics of PM2.5 across regions during and after the coronavirus 2019 pandemic

Area

Period

Slope/Intercept

Spring

Summer

Fall

Winter

Seoul

Pandemic

3.57/1.24

5.90/0.17

2.94/0.96

4.23/0.55

Post-pandemic

6.55/0.03

7.31/−0.96

7.34/−0.16

6.51/−0.08

Ansan–Siheung

Pandemic

6.46/−0.14

7.54/−0.08

3.15/1.72

8.01/1.01

Post-pandemic

6.36/0.73

6.31/0.76

7.15/−0.19

3.30/2.46

Wonju

Pandemic

7.40/−0.34

7.88/−0.29

10.26/−0.36

6.96/0.04

Post-pandemic

9.14/−0.20

6.13/0.65

8.17/−0.22

8.40/−0.26

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