Fig. 1. Sampling sites for NO2 passive air samplers at Yang-Jae IC.
Fig. 2. Plot of NO2 concentration (a) and δ15N-NO2 (b) by distances from expressway at near the Yang-Jae IC.
Fig. 3. Estimated to contribution of NO2 using δ15N-NO2 from Yang-Jae IC.
Table 1. Stable isotopic compositions and concentration of NO2 and NO3
Table 2. Stable isotopic compositions and concentration of NO2 from Yang-Jae IC