Two step PMF data from London studies

In this work, a novel method is devised and the source apportionment of a mixed unit data set (PM10 mass and Number Size Distribution NSD) is achieved using a novel two-step approach to PMF.

In the first step the PM10 data is PMF analysed using a source apportionment approach in order to provide a solution which best describes the environment and conditions considered. The time series G values (and errors) of the PM10 solution are then taken forward into the second step where they are combined with the NSD data and analysed in a second PMF analysis. This results in NSD data associated with the apportioned PM10 factors.