Abstract: In this study in-situ measurement of carbon dioxide (CO₂) and several halogenated greenhouse gases (HFC-134a, PFC-218 and HCFC-22) were chosen for the case study. We did statistical analysis and calculated concentration anomalies and loadings of each wind direction and discussed impact of city emission and transportation on greenhouse gases background observation at Shangdianzi Regional Station in different seasons. In the study period, the ratio of background concentration of CO₂was about 21.2%. The difference of non-background concentration and background concentration was (3.7±1.3)×10^-6by local and city emission and transportation. Anomalies and loadings of HFC-134a and PFC-218 reflected the difference of source characteristics of these two compounds. The seasonal trends of HCFC-22 were consistent with the emission pattern of refrigerant.