CNG

compressed natural gas

is an important source of anthropogenic CH

4

emissions. In order to find out the correlation between CH

4

concentration of CNG filling station and meteorological elements

a LGR（portable greenhouse gas analyzer） and gas chromatograph were used to observe the CH

4

concentration at different refueling links of a gas filling station in Pukou District

Nanjing

and different me

teorological elements（temperature

humidity

wind speed） during the same period were measured. The results show that there is a large amount of CH

4

leakage in the gas station. The difference between the average concentration of CH

4

in the CNG filling station and the background concentration was maintained at 0.7 ×10

-6

especially at the moment when the gas gun is pulled out

the unloading gas concentration reached 422.59×10

-6

. Also

the CH

4

leakage is affected by different meteorological factors

the leakage concentration has a significant negative correlation with temperature and wind speed

and reaches a extremely significant level(|R|=0.866>|R

0.01

|)

and there is no correlation with humidity.