Source apportionment of PM10, organic carbon and elemental carbon at Swiss sites: An intercomparison of different approaches

► Source apportionment results for PM10, OC and EC by PMF, MM-CMB and AeM are compared. ► Generally good agreement of source contributions as estimated with the different approaches is obtained. ► The strengths and the limitations of the different approaches are investigated. ► PMF: correlated source activities are an obstacle for a correct identification of PM source. ► MM-CMB: degradation of organic tracers can lead to an underestimation of source impacts.