COPREM—A multivariate receptor model with a physical approach

A hybrid receptor model, combining the features of chemical mass balance models and non-negative factor analysis, is presented both in theoretical terms and from a more practical viewpoint. A section describes the mathematical details, and another section presents an uncomplicated set of aerosol data from Northeast Greenland and a step-to-step demonstration of how the data was analysed using the model. Since 1992 the model has proven useful in several air pollution studies of very different character.