By using the Flux Source Area Model (FSAM)

the flux source area of suburban lawn in Zhuhai City was analyzed under different stability and different time scales. The results are shown as follows: ① The southeast wind is prevailing with a percentage of 48.36%. ② Under the 90% contribution level

the area of flux source varies with atmospheric stability

there are much larger areas of flux source

up to 155 m

in stable atmosphere. ③ The area of flux source obviously changes with the seasons. The area of flux source changes from large to small in the order of winter

autumn

spring and summer under the stable atmosphere

while it does not change in spring and autumn under the unstable atmosphere. ④ The area of flux source is smaller in day time than in the night. The minimum visual distance of 31m was obtained at 12∶00. In addition

the area of flux source could be influenced by underlying surface

observation height and contribution level (P). Therefore

FSAM was considered as model that can reflect the flux source area of the suburban lawn in Zhuhai City.