Abstract:Aerosol particles were collected by an Anderson cascade impactor at Mt.Huang from June 30 to July 27, 2014 and the organic carbon (OC) and elemental carbon (EC) in these particles were determined by a DRI Model 2001 A carbon analyzer. Combined with secondary ion analyses and back trajectory model calculations, potential sources were discussed. Observations indicated that the average mass concentrations of OC and EC in PM1.1 were (2.89±1.40)μg/m3、(0.14±0.19)μg/m3, (3.76±2.05)μg/m3、(0.17±0.24)μg/m3in PM2.1and(5.60±2.96)μg/m3、(0.18±0.25)μg/m3 in PM9.0, respectively.OC and EC were mainly enriched in fine particles with sizes below 0.43μm, mass concentration accounting for 25.97% of OC and 51.10% of EC in PM9.0.EC came from external transport and OC came from both external transport and local emissions.According to backward trajectory, external transport of carbon particles was from eastern urban areas, western-north and Wuhan during the observation period.