[Spatio-Temporal Variations and Source Apportionment of Carbonaceous Species in PM Across Multiple Sampling Locations in the Chengdu Plain].

To understand the characteristics and sources of carbonaceous aerosols, one-year PM samples were analyzed for their organic carbon (OC) and elemental carbon (EC) content, following the thermal/optical transmission protocol in three cities[Deyang (DY), Chengdu (CD), and Meishan (MS)] in the Chengdu Plain. The observed annual average concentrations (μg·m) were in the following order:MS (15.8±9.